[issue45827] Unittest - commenting passing tests cause previous failing tests to pass
New submission from Jamie Chaisson : Ubuntu Release 20.04.3 LTS (Focal Fossa) 64-bit Using unittest, testing with assertEqual on int values and known good output. Unittest produces one-off error on handful of edge-case tests causing assert to fail. Commenting out passing assertEquals tests to isolate failing tests causes previous failing tests to pass (reproducible). All input values produce output values when testing by hand, only different when using unittest. Pardon the homework. Removing the class and moving member variables into my_datetime function resolves the issue; however, the behavior as written should not be happening. -- components: Tests files: tests.py messages: 406449 nosy: nuse priority: normal severity: normal status: open title: Unittest - commenting passing tests cause previous failing tests to pass type: behavior versions: Python 3.9 Added file: https://bugs.python.org/file50446/tests.py ___ Python tracker <https://bugs.python.org/issue45827> ___ ___ Python-bugs-list mailing list Unsubscribe: https://mail.python.org/mailman/options/python-bugs-list/archive%40mail-archive.com
[issue44127] urllib.parse.ParseResult._replace() does not allow replacing username, password, hostname, port
New submission from Jamie Bliss : As it says in the title. ._replace() (inherited from namedtuple) doesn't allow changing the generated properties. While this is a natural consequence of how ParseResult is implemented, I would describe it as a deficiency of developer experience. My work-around function for this is https://gist.github.com/AstraLuma/00e511feb1f619f407d07e968d69f36b -- components: Library (Lib) messages: 393614 nosy: AstraLuma priority: normal severity: normal status: open title: urllib.parse.ParseResult._replace() does not allow replacing username, password, hostname, port versions: Python 3.10, Python 3.11, Python 3.6, Python 3.7, Python 3.8, Python 3.9 ___ Python tracker <https://bugs.python.org/issue44127> ___ ___ Python-bugs-list mailing list Unsubscribe: https://mail.python.org/mailman/options/python-bugs-list/archive%40mail-archive.com
[issue43449] multiprocessing.Pool - crash in subprocess causes deadlock in parent
Jamie Kirkpatrick added the comment: More reading around this issue and I stumbled on an existing issue which this is a dup of so it can be closed. https://bugs.python.org/issue22393 -- stage: -> resolved status: open -> closed ___ Python tracker <https://bugs.python.org/issue43449> ___ ___ Python-bugs-list mailing list Unsubscribe: https://mail.python.org/mailman/options/python-bugs-list/archive%40mail-archive.com
[issue43449] multiprocessing.Pool - crash in subprocess causes deadlock in parent
New submission from Jamie Kirkpatrick : When using multiprocessing.Pool.apply[_async] a crash in the subprocess that is assigned the work item results in a deadlock in the parent process. The parent process remains blissfully unaware of the crash in the subprocess and waits for a result forever. The parent process treats this as normal since the thread running _maintain_pool handles dead processes and repopulates the pool with a replacement subprocess. See the test-case attached. Its not clear how this case should be handled but it can be very hard to trace issues in an application where this condition arises since all information about the crashing subprocess is lost (even with debug logging for the multiprocessing module enabled). -- components: Library (Lib) files: test.py messages: 388371 nosy: jkp priority: normal severity: normal status: open title: multiprocessing.Pool - crash in subprocess causes deadlock in parent type: behavior versions: Python 3.10, Python 3.6, Python 3.7, Python 3.8, Python 3.9 Added file: https://bugs.python.org/file49860/test.py ___ Python tracker <https://bugs.python.org/issue43449> ___ ___ Python-bugs-list mailing list Unsubscribe: https://mail.python.org/mailman/options/python-bugs-list/archive%40mail-archive.com
Crashing and opening problems
I’ve downloaded python and when I try to launch a application to use with python it opens then closes fast but when I double click it it opens the installer and not python, so I have to use “Open with” Sent from [1]Mail for Windows 10 References Visible links 1. https://go.microsoft.com/fwlink/?LinkId=550986 -- https://mail.python.org/mailman/listinfo/python-list
[issue37839] makesetup Doesn't Handle Defines with Equal Sign
Jamie Bliss added the comment: Similarly, stumbled across this working on https://github.com/pyz-dispenser/cpython-static This is particularly problematic because of the SQLite module's MODULE_NAME macro. -- nosy: +astronouth7303 ___ Python tracker <https://bugs.python.org/issue37839> ___ ___ Python-bugs-list mailing list Unsubscribe: https://mail.python.org/mailman/options/python-bugs-list/archive%40mail-archive.com
[issue32604] Expose the subinterpreters C-API in Python for testing use.
Change by Jamie Stribling : -- components: +Documentation -Interpreter Core ___ Python tracker <https://bugs.python.org/issue32604> ___ ___ Python-bugs-list mailing list Unsubscribe: https://mail.python.org/mailman/options/python-bugs-list/archive%40mail-archive.com
[issue35473] Intel compiler (icc) does not fully support C11 Features, including atomics
New submission from jamie schnaitter : I am currently trying to build 3.6.7 and 3.7.1 using Intel 2019 and it is failing because Intel's implementation of C11, in particular stdatomic, is incomplete. I receive many errors similar to the following, when it cannot find 'atomic_uintptr_t', which is not including in Intel's implementation: ``` In file included from ./Include/Python.h(56), from ./Modules/_io/bufferedio.c(11): ./Include/pyatomic.h(33): error: identifier "atomic_uintptr_t" is undefined atomic_uintptr_t _value; ``` The current check in configure.ac is insufficient, as it only checks to see that the header and library exist and that it contains 'atomic_int'. The configure.ac should be changed to either check for all the atomic types it uses (or at least atomic_uintprt_t) or, when `--with-icc` is enabled, it should set 'HAVE_STD_ATOMIC' to 0/false. -- components: Build, Installation, Library (Lib), ctypes messages: 331713 nosy: jamie schnaitter priority: normal severity: normal status: open title: Intel compiler (icc) does not fully support C11 Features, including atomics type: compile error versions: Python 3.6, Python 3.7 ___ Python tracker <https://bugs.python.org/issue35473> ___ ___ Python-bugs-list mailing list Unsubscribe: https://mail.python.org/mailman/options/python-bugs-list/archive%40mail-archive.com
[issue29221] ABC Recursion Error on isinstance() with less than recursion limit class hierarchy depth
Jamie Bliss added the comment: I consider it debatable as to if this is a bug in ABC (for using recursion in a way that limits class tree depth) or in CPython (for accounting recursion in such a way you can get significantly shallower stacks). -- ___ Python tracker <rep...@bugs.python.org> <http://bugs.python.org/issue29221> ___ ___ Python-bugs-list mailing list Unsubscribe: https://mail.python.org/mailman/options/python-bugs-list/archive%40mail-archive.com
[issue29221] ABC Recursion Error on isinstance() with less than recursion limit class hierarchy depth
Changes by Jamie Bliss <astronouth7...@gmail.com>: -- nosy: +astronouth7303 ___ Python tracker <rep...@bugs.python.org> <http://bugs.python.org/issue29221> ___ ___ Python-bugs-list mailing list Unsubscribe: https://mail.python.org/mailman/options/python-bugs-list/archive%40mail-archive.com
Re: Requests for webbrowser module
Thanks for your help, I realise that what I wanted was chromes default new tab page, not a blank page. 'about:blank' worked fine but it wasn't what I wanted sorry. I'll try the CTRL+4 later and see it that works. On 14 Sep 2016 21:11, "John Gordon" <gor...@panix.com> wrote: > In <mailman.196.1473872323.2411.python-l...@python.org> Jamie < > ja9...@my.bristol.ac.uk> writes: > > > I am not sure if this is an intended consequence but when using the > > webbrowser module to open a new blank browser tab in chrome it opens it > > in a new browser window instead of using the current window. Providing > > There is an internal setting within Chrome that controls whether new pages > are opened in a new tab or a new window. Perhaps that is your issue? > > -- > John Gordon A is for Amy, who fell down the stairs > gor...@panix.com B is for Basil, assaulted by bears > -- Edward Gorey, "The Gashlycrumb Tinies" > > -- > https://mail.python.org/mailman/listinfo/python-list > -- https://mail.python.org/mailman/listinfo/python-list
Requests for webbrowser module
Hi, I am not sure if this is an intended consequence but when using the webbrowser module to open a new blank browser tab in chrome it opens it in a new browser window instead of using the current window. Providing any complete url provides different behaviour, it opening a new tab in the current browser window. Below is some code that produces the different behaviours. blank tab code: import webbrowser chrome = "C:/Program Files (x86)/Google/Chrome/Application/chrome.exe %s" url = "chrome://newtab" webbrowser.get(chrome).open_new_tab(url) webbrowser.get(chrome).open_new_tab(url) normal tab code: import webbrowser chrome = "C:/Program Files (x86)/Google/Chrome/Application/chrome.exe %s" url = "http://google.com; webbrowser.get(chrome).open_new_tab(url) webbrowser.get(chrome).open_new_tab(url) I would like to be able to open new blank tabs in the current browser window if possible. If you know of a way to do this with the webbrowser module I would appreciate your help. Also is there any chance that the ability to close browser tabs will be added to the webbrowser module soon? Kind Regards, James Ansell -- https://mail.python.org/mailman/listinfo/python-list
Proposal for new minor syntax
I would like to propose a new piece of syntax for the python language; .= In short, the operator is form of syntactic sugar, for instance consider the following code: hello = hello world hello = hello.strip() This could be written as: hello = hello world hello .= strip() In this slightly contrived example, the programmer saved (a small amount of) time when writing the code. With code with longer variable names, or lots of similar statements all in a row, this helps to keep code more concise. The operator would be constricted to one method or field on the right-hand side, which must belong to the object on the left hand side. Another example could be when using Linked Lists, instead of writing something like: loop_node = loop_node.next you could write: loop_node .= next Does this idea have any chance of acceptance if submitted as a PEP? What are the potential concerns I could consider with the syntax? Thanks, Jamie -- https://mail.python.org/mailman/listinfo/python-list
Re: Matplotlib Contour Plots
On Tuesday, August 19, 2014 10:21:48 PM UTC+1, pec...@pascolo.net wrote:
Jamie Mitchell jamiemitchell1...@gmail.com writes:
You were right Christian I wanted a shape (2,150).
Thank you Rustom and Steven your suggestion has worked.
Unfortunately the data doesn't plot as I imagined.
What I would like is:
X-axis - hs_con_sw
Y-axis - te_con_sw
Z-axis - Frequency
What I would like is for the Z-axis to contour the frequency or
amount of times that the X-axis data and Y-axis data meet at a
particular point or bin.
Does anyone know what function or graph could best show this?
in my understanding, you have 3 arrays of data that describe 3D data
points, and you want to draw a 2D contour plot...
in this case you have to interpolate the z-values on a regular grid,
that's very easy if you already know what to do ;-)
here I assume that data is in a .csv file
% cat a.csv
0 ≤ x ≤ 10, 0 ≤ y ≤ 10, z = cos(sqrt((x-5)**2_(y-5)**2))
1.922065,5.827944,-0.998953
7.582322,0.559370,0.411861
5.001753,3.279957,-0.148694
...
of course my z's are different from yours, but this shouldn't be a
real problem --- and here it is my *tested* solution (tested on python
2.7, that is), please feel free to adapt to your needs
hth, ciao
g
% cat contour.py
from numpy import loadtxt, linspace
from matplotlib.mlab import griddata
import matplotlib.pyplot as pl
# open 'a.csv', specify the delimiter, specify how many header rows,
# slurp the data
temp_array = loadtxt(open('a.csv'),delimiter=',',skiprows=1)
# the shape of temp_array is (N,3), we want its transpose
temp_array = temp_array.transpose()
# now the shape is (3,N) and we can do unpack and assignment:
x, y, z = temp_array
# now the tricky part,
# 1: create two arrays with 101 (arbitrary number) equispaced values
# between 0 and 10 --- that is the ranges of data x and data y
xi = linspace(0,10,101)
yi = linspace(0,10,101)
# 2: create, by interpolation, the 2D array that contourf so eagerly
# awaited!
print griddata.__doc__
zi = griddata(x,y,z, xi,yi)
# eventually, lets plot the stuff...
# see http://matplotlib.org/examples/pylab_examples/griddata_demo.html
# for further details and ideas
pl.contour (xi,yi,zi,11,linewidths=1,colors='black')
pl.contourf(xi,yi,zi); pl.colorbar()
# optional
pl.gca().set_aspect('equal', 'box')
pl.show()
% python contour.py
This is great and works very well - thank you!!
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Re: Matplotlib Contour Plots
You were right Christian I wanted a shape (2,150). Thank you Rustom and Steven your suggestion has worked. Unfortunately the data doesn't plot as I imagined. What I would like is: X-axis - hs_con_sw Y-axis - te_con_sw Z-axis - Frequency What I would like is for the Z-axis to contour the frequency or amount of times that the X-axis data and Y-axis data meet at a particular point or bin. Does anyone know what function or graph could best show this? Thanks for all your help, Jamie -- https://mail.python.org/mailman/listinfo/python-list
Re: Matplotlib Contour Plots
On Friday, August 15, 2014 4:13:26 PM UTC+1, Steven D'Aprano wrote: Jamie Mitchell wrote: I created the 2D array which read as: That's not a 2D array. When the amount of data you have is too big to clearly see what it happening, replace it with something smaller. Instead of 30 items per sub-array, try it with 5 items per sub-array. Instead of eight decimal places, try it with single-digit integers. Anything to make it small enough to see clearly. When I do that with your data, instead of this: array([[[ 2.0886, 2.29400015, 2.00400019, 1.8811, 2.0480001 , 2.16800022, 2.0480001 , 1.8829, 1.9586, 2.0029, 2.02800012, 1.8124, 1.9505, 1.96200013, 1.95200014, 1.99800014, 2.0717, 1.8829, 1.9849, 2.1346, 2.1148, 1.8945, 2.0519, 2.0198, 2.03400016, 2.16600013, 2.0099, 1.86200011, 2.19800019, 2.0128]], [[ 8.515 , 8.8811, 8.5519, 7.9481, 8.6066, 8.515 , 8.8019, 8.1311, 8.6858, 8.7254, 8.4754, 8.25 , 8.4085, 8.4358, 8.3839, 8.3566, 8.6339, 8.5123, 8.3689, 8.6981, 8.5273, 8.1339, 8.3689, 8.4208, 8.5547, 8.7254, 9.0915, 8.1858, 8.7623, 8.5396]]], dtype=float32) I get this: array([[[ 2, 2, 2, 1, 2]], [[ 8, 8, 8, 7, 8]]], dtype=float32) which is much easier to work with. See the difference between that smaller example, and my earlier explanation of the difference between a 1D and 2D array? One dimensional arrays are made from a single list of numbers: [...] Two dimensional arrays are made from a list of lists: [ [...], [...] ] *Three* dimensional arrays are made from a list of lists of lists: [ [ [...], [...] ] ] *Four* dimensional arrays are made from a list of lists of lists of lists: [ [ [ [...], [...] ] ] ] and so on. You have a 3D array, with dimensions 2 x 1 x 30. You can check the dimensions by storing the array into a variable like this: py a = numpy.array([[[ 2, 2, 2, 1, 2]], [[ 8, 8, 8, 7, 8]]]) py a.shape (2, 1, 5) -- Steven Thanks for your suggestions Steven. Unfortunately I still can't make the plot I'm looking for. Do you mind if I go back to the start? Sorry I'm probably not explaining what I need very well. So I have two 1D arrays: 1st array - ([8, 8.8,8.5,7.9,8.6 ...], dtype=float32) It has a shape (150,) 2nd array - ([2, 2.2, 2.5, 2.3, ...],dtype=float32) It has a shape (150,) What I want to do is create a 2D array which merges the 1st and 2nd array so that I would have: ([[8, 8.8,8.5,7.9,8.6 ...],[2,2,2,2,5,2.3, ...]], dtype=float32) that would have a shape (150,150) In this form I could then plot a 2D contour. Thanks for your patience. Jamie -- https://mail.python.org/mailman/listinfo/python-list
Re: Matplotlib Contour Plots
I forgot to mention that when I try: a=np.array([[hs_con_sw],[te_con_sw]]) I get a 3D shape for some reason - (2,1,150) which is not what I'm after. Thanks, Jamie -- https://mail.python.org/mailman/listinfo/python-list
Re: Matplotlib Contour Plots
On Thursday, August 14, 2014 5:53:09 PM UTC+1, Steven D'Aprano wrote: Jamie Mitchell wrote: Hello all, I want to contour a scatter plot but I don't know how. Can anyone help me out? Certainly. Which way did you come in? :-) Sorry, I couldn't resist. It took me literally 20 seconds to find this by googling for matplotlib contour plot, and it only took that long because I misspelled contour the first time. http://matplotlib.org/examples/pylab_examples/contour_demo.html Does this help? If not, please explain what experience you have with matplotlib, what you have tried, what you expected it to do, and what it did instead. -- Steven Yep I've seen that thanks but I can't get it to work. I don't have much experience with matplotlib or programming in general. I just want to get a contour plot of two numpy arrays. When I call plt.contour on my data I get input must be a 2D array An example of one of my arrays: array([ 2.0886, 2.29400015, 2.00400019, 1.8811, 2.0480001 , 2.16800022, 2.0480001 , 1.8829, 1.9586, 2.0029, 2.02800012, 1.8124, 1.9505, 1.96200013, 1.95200014, 1.99800014, 2.0717, 1.8829, 1.9849, 2.1346, 2.1148, 1.8945, 2.0519, 2.0198, 2.03400016, 2.16600013, 2.0099, 1.86200011, 2.19800019, 2.0128], dtype=float32) How do I get the above array in to the right format for a contour plot? Thanks, Jamie -- https://mail.python.org/mailman/listinfo/python-list
Re: Matplotlib Contour Plots
On Friday, August 15, 2014 2:23:25 PM UTC+1, Steven D'Aprano wrote: Jamie Mitchell wrote: [...] I just want to get a contour plot of two numpy arrays. When I call plt.contour on my data I get input must be a 2D array You are providing a 1D array, or possibly a 3D array. So the question you really want to ask is not How do I do contour plots but how do I make a 2D array? An example of one of my arrays: array([ 2.0886, 2.29400015, 2.00400019, 1.8811, 2.0480001 , 2.16800022, 2.0480001 , 1.8829, 1.9586, 2.0029, 2.02800012, 1.8124, 1.9505, 1.96200013, 1.95200014, 1.99800014, 2.0717, 1.8829, 1.9849, 2.1346, 2.1148, 1.8945, 2.0519, 2.0198, 2.03400016, 2.16600013, 2.0099, 1.86200011, 2.19800019, 2.0128], dtype=float32) How do I get the above array in to the right format for a contour plot? Here's an example of making a 2D array: py import numpy py a = numpy.array([1.2, 2.5, 3.7, 4.8]) # One dimensional array py a array([ 1.2, 2.5, 3.7, 4.8]) py b = numpy.array([ [1.2, 2.5, 3.7, 4.8], ... [9.5, 8.1, 7.0, 6.2] ]) # Two dimensional array py b array([[ 1.2, 2.5, 3.7, 4.8], [ 9.5, 8.1, 7. , 6.2]]) One dimensional arrays are made from a single list of numbers: [...] Two dimensional arrays are made from a list of lists: [ [...], [...] ] -- Steven Thank you Steven. I created the 2D array which read as: array([[[ 2.0886, 2.29400015, 2.00400019, 1.8811, 2.0480001 , 2.16800022, 2.0480001 , 1.8829, 1.9586, 2.0029, 2.02800012, 1.8124, 1.9505, 1.96200013, 1.95200014, 1.99800014, 2.0717, 1.8829, 1.9849, 2.1346, 2.1148, 1.8945, 2.0519, 2.0198, 2.03400016, 2.16600013, 2.0099, 1.86200011, 2.19800019, 2.0128]], [[ 8.515 , 8.8811, 8.5519, 7.9481, 8.6066, 8.515 , 8.8019, 8.1311, 8.6858, 8.7254, 8.4754, 8.25 , 8.4085, 8.4358, 8.3839, 8.3566, 8.6339, 8.5123, 8.3689, 8.6981, 8.5273, 8.1339, 8.3689, 8.4208, 8.5547, 8.7254, 9.0915, 8.1858, 8.7623, 8.5396]]], dtype=float32) Unfortunately when I called plt.contour on this, it said again Input must be a 2D array. Is there something I have missed? Thanks, Jamie -- https://mail.python.org/mailman/listinfo/python-list
Matplotlib Contour Plots
Hello all, I want to contour a scatter plot but I don't know how. Can anyone help me out? Cheers, Jamie -- https://mail.python.org/mailman/listinfo/python-list
Contouring a 2D histogram
Hi all,
I have plotted a 2D histogram like so:
python2.7
import netCDF4
import iris
import iris.palette
import numpy as np
import matplotlib as mpl
import matplotlib.cm as cm
import matplotlib.mlab as mlab
import matplotlib.pyplot as plt
from matplotlib.colors import from_levels_and_colors
fig=plt.figure()
nbins=20
nice_cmap=plt.get_cmap('brewer_RdYlBu_11')
colors=nice_cmap([5,6,7,8,9,10])
levels=[1,2,3,4,5]
cmap, norm=from_levels_and_colors(levels, colors, extend='both')
H, xedges, yedges=np.histogram2d(te_Q0_con_sw,hs_Q0_con_sw,bins=nbins)
Hmasked=np.ma.masked_where(H==0,H)
plt.pcolormesh(xedges,yedges,Hmasked,cmap=cmap,norm=norm,label='Q0 control')
# From this I get a 'scattered' 2D histogram.
Does anyone know how I can contour that scatter?
Thanks,
Jamie
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Matplotlib Colouring outline of histogram
Hi folks, Instead of colouring the entire bar of a histogram i.e. filling it, I would like to colour just the outline of the histogram. Does anyone know how to do this? Version - Python2.7 Cheers, Jamie -- https://mail.python.org/mailman/listinfo/python-list
Problem with numpy 2D Histogram
Hi folks,
I'm trying to plot a 2D histogram but I'm having some issues:
from pylab import *
import numpy as np
import netCDF4
hist,xedges,yedges=np.histogram2d(x,y,bins=10)
extent=[xedges[0],xedges[-1],yedges[0],yedges[-1]]
imshow(hist.T,extent=extent,interpolation='nearest')
colorbar()
show()
After the first line of code I get:
TypeError: Cannot cast array data from dtype('O') to dtype('float64') according
to the rule 'safe'
I'm using python2.7, x and y are type 'numpy.ndarray'
Cheers,
Jamie
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Re: Problem with numpy 2D Histogram
On Friday, June 20, 2014 10:25:44 AM UTC+1, Peter Otten wrote:
Jamie Mitchell wrote:
Hi folks,
I'm trying to plot a 2D histogram but I'm having some issues:
from pylab import *
import numpy as np
import netCDF4
hist,xedges,yedges=np.histogram2d(x,y,bins=10)
extent=[xedges[0],xedges[-1],yedges[0],yedges[-1]]
imshow(hist.T,extent=extent,interpolation='nearest')
colorbar()
show()
After the first line of code I get:
TypeError: Cannot cast array data from dtype('O') to dtype('float64')
according to the rule 'safe'
I'm using python2.7, x and y are type 'numpy.ndarray'
The error message complains about the dtype, i. e. the type of the elements
in the array, not the array itself. Make sure the elements are floating
point numbers or something compatible, not arbitrary Python objects.
As a baseline the following works
from pylab import *
import numpy as np
x, y = np.random.randn(2, 100)
print x, type(x), x.dtype
print y, type(y), y.dtype
hist, xedges, yedges = np.histogram2d(x, y, bins=10)
extent = [xedges[0], xedges[-1], yedges[0], yedges[-1]]
imshow(hist.T, extent=extent, interpolation='nearest')
colorbar()
show()
while this doesn't:
#...
x, y = np.random.randn(2, 100)
import decimal
y = np.array([decimal.Decimal.from_float(v) for v in y])
#...
Thanks Peter.
I have changed my x and y data to float64 types but I am still getting the same
error message?
Cheers,
Jamie
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Re: Problem with numpy 2D Histogram
On Friday, June 20, 2014 12:00:15 PM UTC+1, Peter Otten wrote:
Jamie Mitchell wrote:
I have changed my x and y data to float64 types but I am still getting the
same error message?
Please double-check by adding
assert x.dtype == np.float64
assert y.dtype == np.float64
If none of these assertions fail try to make a minimal script including some
data that provokes the TypeError and post it here.
OK this is my code:
swh_Q0_con_sw=netCDF4.Dataset('/data/cr1/jmitchel/Q0/swh/controlperiod/south_west/swhcontrol_swest_annavg.nc','r')
hs_Q0_con_sw=swh_Q0_con_sw.variables['hs'][:]
x=hs_Q0_con_sw.astype(float64)
# When I print the dtype of x here it says 'float64'
mwp_Q0_con_sw=netCDF4.Dataset('/data/cr1/jmitchel/Q0/mean_wave_period/south_west/controlperiod/mwpcontrol_swest_annavg1D.nc','r')
te_Q0_con_sw=mwp_Q0_con_sw.variables['te'][:]
y=te_Q0_con_sw.astype(float64)
If I try assert x.dtype == np.float64 I get:
AssertionError
hist,xedges,yedges=np.histogram2d(x,y,bins=10)
TypeError: Cannot cast array data from dtype('O') to dtype('float64') according
to the rule 'safe'
Thanks,
Jamie
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Re: Problem with numpy 2D Histogram
On Friday, June 20, 2014 9:46:29 AM UTC+1, Jamie Mitchell wrote:
Hi folks,
I'm trying to plot a 2D histogram but I'm having some issues:
from pylab import *
import numpy as np
import netCDF4
hist,xedges,yedges=np.histogram2d(x,y,bins=10)
extent=[xedges[0],xedges[-1],yedges[0],yedges[-1]]
imshow(hist.T,extent=extent,interpolation='nearest')
colorbar()
show()
After the first line of code I get:
TypeError: Cannot cast array data from dtype('O') to dtype('float64')
according to the rule 'safe'
I'm using python2.7, x and y are type 'numpy.ndarray'
Cheers,
Jamie
Thanks for your help Peter.
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Re: Matplotlib Colouring outline of histogram
On Friday, June 20, 2014 2:47:03 PM UTC+1, Jason Swails wrote:
On Fri, Jun 20, 2014 at 4:10 AM, Jamie Mitchell jamiemit...@gmail.com wrote:
Hi folks,
Instead of colouring the entire bar of a histogram i.e. filling it, I would
like to colour just the outline of the histogram. Does anyone know how to do
this?
Version - Python2.7
Look at the matplotlib.pyplot.hist function documentation:
http://matplotlib.org/api/pyplot_api.html#matplotlib.pyplot.hist
In addition to the listed parameters, you'll see the Other Parameters taken
are those that can be applied to the created Patch objects (which are the
actual rectangles). For the Patch keywords, see the API documentation on the
Patch object
(http://matplotlib.org/api/artist_api.html#matplotlib.patches.Patch). So you
can do one of two things:
1) Pass the necessary Patch keywords to effect what you want
e.g. (untested):
import matplotlib.pyplot as plt
plt.hist(dataset, bins=10, range=(-5, 5), normed=True,
edgecolor='b', linewidth=2, facecolor='none', # Patch options
)
plt.show()
2) Iterate over the Patch instances returned by plt.hist() and set the
properties you want.
e.g. (untested):
import matplotlib.pyplot as plt
n, bins, patches = plt.hist(dataset, bins=10, range=(-5, 5), normed=True)
for patch in patches:
patch.set_edgecolor('b') # color of the lines around each bin
patch.set_linewidth(2) # Set width of bin edge
patch.set_facecolor('none') # set no fill
# Anything else you want to do
plt.show()
Approach (1) is the easy way, and is there to satisfy the majority of use
cases. However, approach (2) is _much_ more flexible. Suppose you wanted to
highlight a particular region of your data with a specific facecolor or
edgecolor -- you can apply the features you want to individual patches using
approach (2). Or if you wanted to highlight a specific bin with thicker
lines.
This is a common theme in matplotlib -- you can use keywords to apply the
same features to every part of a plot or you can iterate over the drawn
objects and customize them individually. This is a large part of what makes
matplotlib nice to me -- it has a simple mode as well as a predictable API
for customizing a plot in almost any way you could possibly want.
HTH,
Jason
--
Jason M. Swails
BioMaPS,
Rutgers University
Postdoctoral Researcher
That's great Jason thanks for the detailed response, I went with the easier
option 1!
I am also trying to put hatches on my histograms like so:
plt.hist(dataset,bins=10,hatch=['*'])
When it comes to plt.show() I get the following error message:
File
/usr/local/sci/lib/python2.7/site-packages/matplotlib-1.3.1-py2.7-linux-x86_64.egg/matplotlib/backends/backend_gtk.py,
line 435, in expose_event
self._render_figure(self._pixmap, w, h)
File
/usr/local/sci/lib/python2.7/site-packages/matplotlib-1.3.1-py2.7-linux-x86_64.egg/matplotlib/backends/backend_gtkagg.py,
line 84, in _render_figure
FigureCanvasAgg.draw(self)
File
/usr/local/sci/lib/python2.7/site-packages/matplotlib-1.3.1-py2.7-linux-x86_64.egg/matplotlib/backends/backend_agg.py,
line 451, in draw
self.figure.draw(self.renderer)
File
/usr/local/sci/lib/python2.7/site-packages/matplotlib-1.3.1-py2.7-linux-x86_64.egg/matplotlib/artist.py,
line 55, in draw_wrapper
draw(artist, renderer, *args, **kwargs)
File
/usr/local/sci/lib/python2.7/site-packages/matplotlib-1.3.1-py2.7-linux-x86_64.egg/matplotlib/figure.py,
line 1034, in draw
func(*args)
File
/usr/local/sci/lib/python2.7/site-packages/matplotlib-1.3.1-py2.7-linux-x86_64.egg/matplotlib/artist.py,
line 55, in draw_wrapper
draw(artist, renderer, *args, **kwargs)
File
/usr/local/sci/lib/python2.7/site-packages/matplotlib-1.3.1-py2.7-linux-x86_64.egg/matplotlib/axes.py,
line 2086, in draw
a.draw(renderer)
File
/usr/local/sci/lib/python2.7/site-packages/matplotlib-1.3.1-py2.7-linux-x86_64.egg/matplotlib/artist.py,
line 55, in draw_wrapper
draw(artist, renderer, *args, **kwargs)
File
/usr/local/sci/lib/python2.7/site-packages/matplotlib-1.3.1-py2.7-linux-x86_64.egg/matplotlib/patches.py,
line 429, in draw
renderer.draw_path(gc, tpath, affine, rgbFace)
File
/usr/local/sci/lib/python2.7/site-packages/matplotlib-1.3.1-py2.7-linux-x86_64.egg/matplotlib/backends/backend_agg.py,
line 145, in draw_path
self._renderer.draw_path(gc, path, transform, rgbFace)
File
/usr/local/sci/lib/python2.7/site-packages/matplotlib-1.3.1-py2.7-linux-x86_64.egg/matplotlib/backend_bases.py,
line 1010, in get_hatch_path
return Path.hatch(self._hatch, density)
File
/usr/local/sci/lib/python2.7/site-packages/matplotlib-1.3.1-py2.7-linux-x86_64.egg/matplotlib/path.py,
line 888, in hatch
hatch_path = cls._hatch_dict.get((hatchpattern, density))
TypeError: unhashable type: 'list'
Traceback (most recent call
Re: Matplotlib Colouring outline of histogram
On Friday, June 20, 2014 9:10:58 AM UTC+1, Jamie Mitchell wrote: Hi folks, Instead of colouring the entire bar of a histogram i.e. filling it, I would like to colour just the outline of the histogram. Does anyone know how to do this? Version - Python2.7 Cheers, Jamie Great thanks again Jason. -- https://mail.python.org/mailman/listinfo/python-list
Re: Matplotlib - specifying bin widths
On Thursday, June 5, 2014 4:54:16 PM UTC+1, Jamie Mitchell wrote: Hello all! Instead of setting the number of bins I want to set the bin width. I would like my bins to go from 1.7 to 2.4 in steps of 0.05. How do I say this in the code? Cheers, Jamie That's great thanks Mark. -- https://mail.python.org/mailman/listinfo/python-list
Overlaying a boxplot onto a time series figure
Hi there,
I would like to overlay some boxplots onto a time series.
I have tried pylab.hold(True) in between the two plots in my code but this
hasn't worked.
The problem is that the x-axes of the boxplots and the time series are not the
same.
Code for time series:
python2.7
import netCDF4
import matplotlib.pyplot as plt
import numpy as np
swh_Q0_con_sw=netCDF4.Dataset('/data/cr1/jmitchel/Q0/swh/controlperiod/south_west/swhcontrol_swest_annavg1D.nc','r')
hs_Q0_con_sw=swh_Q0_con_sw.variables['hs'][:]
year_con=swh_Q0_con_sw.variables['year'][:]
swh_Q3_con_sw=netCDF4.Dataset('/data/cr1/jmitchel/Q3/swh/controlperiod/south_west/swhcontrol_swest_annavg1D.nc','r')
hs_Q3_con_sw=swh_Q3_con_sw.variables['hs'][:]
swh_Q4_con_sw=netCDF4.Dataset('/data/cr1/jmitchel/Q4/swh/controlperiod/south_west/swhcontrol_swest_annavg1D.nc','r')
hs_Q4_con_sw=swh_Q4_con_sw.variables['hs'][:]
swh_Q14_con_sw=netCDF4.Dataset('/data/cr1/jmitchel/Q14/swh/controlperiod/south_west/swhcontrol_swest_annavg1D.nc','r')
hs_Q14_con_sw=swh_Q14_con_sw.variables['hs'][:]
swh_Q16_con_sw=netCDF4.Dataset('/data/cr1/jmitchel/Q16/swh/controlperiod/south_west/swhcontrol_swest_annavg1D.nc','r')
hs_Q16_con_sw=swh_Q16_con_sw.variables['hs'][:]
swh_Q0_fut_sw=netCDF4.Dataset('/data/cr1/jmitchel/Q0/swh/2050s/south_west/swh2050s_swest_annavg1D.nc','r')
hs_Q0_fut_sw=swh_Q0_fut_sw.variables['hs'][:]
year_fut=swh_Q0_fut_sw.variables['year'][:]
swh_Q3_fut_sw=netCDF4.Dataset('/data/cr1/jmitchel/Q3/swh/2050s/south_west/swh2050s_swest_annavg1D.nc','r')
hs_Q3_fut_sw=swh_Q3_fut_sw.variables['hs'][:]
swh_Q4_fut_sw=netCDF4.Dataset('/data/cr1/jmitchel/Q4/swh/2050s/south_west/swh2050s_swest_annavg1D.nc','r')
hs_Q4_fut_sw=swh_Q4_fut_sw.variables['hs'][:]
swh_Q14_fut_sw=netCDF4.Dataset('/data/cr1/jmitchel/Q14/swh/2050s/south_west/swh2050s_swest_annavg1D.nc','r')
hs_Q14_fut_sw=swh_Q14_fut_sw.variables['hs'][:]
swh_Q16_fut_sw=netCDF4.Dataset('/data/cr1/jmitchel/Q16/swh/2050s/south_west/swh2050s_swest_annavg1D.nc','r')
hs_Q16_fut_sw=swh_Q16_fut_sw.variables['hs'][:]
fit_Q0_con_sw=np.polyfit(year_con,hs_Q0_con_sw,1)
fit_fn_Q0_con_sw=np.poly1d(fit_Q0_con_sw)
plt.plot(year_con,hs_Q0_con_sw,'g.')
plt.plot(year_con,fit_fn_Q0_con_sw(year_con),'g',label='Q0 no pert')
fit_Q3_con_sw=np.polyfit(year_con,hs_Q3_con_sw,1)
fit_fn_Q3_con_sw=np.poly1d(fit_Q3_con_sw)
plt.plot(year_con,hs_Q3_con_sw,'b.')
plt.plot(year_con,fit_fn_Q3_con_sw(year_con),'b',label='Q3 low sens')
fit_Q4_con_sw=np.polyfit(year_con,hs_Q4_con_sw,1)
fit_fn_Q4_con_sw=np.poly1d(fit_Q4_con_sw)
plt.plot(year_con,hs_Q4_con_sw,'y.')
plt.plot(year_con,fit_fn_Q4_con_sw(year_con),'y',label='Q4 low sens')
fit_Q14_con_sw=np.polyfit(year_con,hs_Q14_con_sw,1)
fit_fn_Q14_con_sw=np.poly1d(fit_Q14_con_sw)
plt.plot(year_con,hs_Q14_con_sw,'r.')
plt.plot(year_con,fit_fn_Q14_con_sw(year_con),'r',label='Q14 high sens')
fit_Q16_con_sw=np.polyfit(year_con,hs_Q16_con_sw,1)
fit_fn_Q16_con_sw=np.poly1d(fit_Q16_con_sw)
plt.plot(year_con,hs_Q16_con_sw,'c.')
plt.plot(year_con,fit_fn_Q16_con_sw(year_con),'c',label='Q16 high sens')
fit_Q0_fut_sw=np.polyfit(year_fut,hs_Q0_fut_sw,1)
fit_fn_Q0_fut_sw=np.poly1d(fit_Q0_fut_sw)
plt.plot(year_fut,hs_Q0_fut_sw,'g.')
plt.plot(year_fut,fit_fn_Q0_fut_sw(year_fut),'g')
fit_Q3_fut_sw=np.polyfit(year_fut,hs_Q3_fut_sw,1)
fit_fn_Q3_fut_sw=np.poly1d(fit_Q3_fut_sw)
plt.plot(year_fut,hs_Q3_fut_sw,'b.')
plt.plot(year_fut,fit_fn_Q3_fut_sw(year_fut),'b')
fit_Q4_fut_sw=np.polyfit(year_fut,hs_Q4_fut_sw,1)
fit_fn_Q4_fut_sw=np.poly1d(fit_Q4_fut_sw)
plt.plot(year_fut,hs_Q4_fut_sw,'y.')
plt.plot(year_fut,fit_fn_Q4_fut_sw(year_fut),'y')
fit_Q14_fut_sw=np.polyfit(year_fut,hs_Q14_fut_sw,1)
fit_fn_Q14_fut_sw=np.poly1d(fit_Q14_fut_sw)
plt.plot(year_fut,hs_Q14_fut_sw,'r.')
plt.plot(year_fut,fit_fn_Q14_fut_sw(year_fut),'y')
fit_Q16_fut_sw=np.polyfit(year_fut,hs_Q16_fut_sw,1)
fit_fn_Q16_fut_sw=np.poly1d(fit_Q16_fut_sw)
plt.plot(year_fut,hs_Q16_fut_sw,'c.')
plt.plot(year_fut,fit_fn_Q16_fut_sw(year_fut),'c')
plt.legend(loc='best')
plt.xlabel('Year')
plt.ylabel('Significant Wave Height annual averages SW England')
plt.title('Time series of Significant Wave Height')
plt.show()
Code for boxplots:
python2.7
from pylab import *
import netCDF4
data=(hs_Q0_con_sw,hs_Q3_con_sw,hs_Q4_con_sw,hs_Q14_con_sw,hs_Q16_con_sw)
figure(1)
boxplot(data)
labels=('QO no pert','Q3 low sens','Q4 low sens','Q14 high sens','Q16 high
sens')
xticks(range(1,6),labels,rotation=15)
xlabel('Ensemble Member')
ylabel('Significant Wave Height Annual Average')
title('Significant Wave Height SW England 1981-2010')
show()
If anybody knows how I could integrate these two plots I would be eternally
grateful!
Thanks,
Jamie
--
https://mail.python.org/mailman/listinfo/python-list
Matplotlib - specifying bin widths
Hello all! Instead of setting the number of bins I want to set the bin width. I would like my bins to go from 1.7 to 2.4 in steps of 0.05. How do I say this in the code? Cheers, Jamie -- https://mail.python.org/mailman/listinfo/python-list
Re: Adding R squared value to scatter plot
On Wednesday, May 21, 2014 1:30:16 PM UTC+1, Jason Swails wrote:
On Wed, May 21, 2014 at 7:59 AM, Jamie Mitchell jamiemit...@gmail.com wrote:
I have made a plot using the following code:
python2.7
import netCDF4
import matplotlib.pyplot as plt
import numpy as np
swh_Q0_con_sw=netCDF4.Dataset('/data/cr1/jmitchel/Q0/swh/controlperiod/south_west/swhcontrol_swest_annavg1D.nc','r')
hs_Q0_con_sw=swh_Q0_con_sw.variables['hs'][:]
swh_Q3_con_sw=netCDF4.Dataset('/data/cr1/jmitchel/Q3/swh/controlperiod/south_west/swhcontrol_swest_annavg1D.nc','r')
hs_Q3_con_sw=swh_Q3_con_sw.variables['hs'][:]
swh_Q4_con_sw=netCDF4.Dataset('/data/cr1/jmitchel/Q4/swh/controlperiod/south_west/swhcontrol_swest_annavg1D.nc','r')
hs_Q4_con_sw=swh_Q4_con_sw.variables['hs'][:]
swh_Q14_con_sw=netCDF4.Dataset('/data/cr1/jmitchel/Q14/swh/controlperiod/south_west/swhcontrol_swest_annavg1D.nc','r')
hs_Q14_con_sw=swh_Q14_con_sw.variables['hs'][:]
swh_Q16_con_sw=netCDF4.Dataset('/data/cr1/jmitchel/Q16/swh/controlperiod/south_west/swhcontrol_swest_annavg1D.nc','r')
hs_Q16_con_sw=swh_Q16_con_sw.variables['hs'][:]
swh_Q0_fut_sw=netCDF4.Dataset('/data/cr1/jmitchel/Q0/swh/2050s/south_west/swh2050s_swest_annavg1D.nc','r')
hs_Q0_fut_sw=swh_Q0_fut_sw.variables['hs'][:]
swh_Q3_fut_sw=netCDF4.Dataset('/data/cr1/jmitchel/Q3/swh/2050s/south_west/swh2050s_swest_annavg1D.nc','r')
hs_Q3_fut_sw=swh_Q3_fut_sw.variables['hs'][:]
swh_Q4_fut_sw=netCDF4.Dataset('/data/cr1/jmitchel/Q4/swh/2050s/south_west/swh2050s_swest_annavg1D.nc','r')
hs_Q4_fut_sw=swh_Q4_fut_sw.variables['hs'][:]
swh_Q14_fut_sw=netCDF4.Dataset('/data/cr1/jmitchel/Q14/swh/2050s/south_west/swh2050s_swest_annavg1D.nc','r')
hs_Q14_fut_sw=swh_Q14_fut_sw.variables['hs'][:]
swh_Q16_fut_sw=netCDF4.Dataset('/data/cr1/jmitchel/Q16/swh/2050s/south_west/swh2050s_swest_annavg1D.nc','r')
hs_Q16_fut_sw=swh_Q16_fut_sw.variables['hs'][:]
fit_Q0_sw=np.polyfit(hs_Q0_con_sw,hs_Q0_fut_sw,1)
fit_fn_Q0_sw=np.poly1d(fit_Q0_sw)
plt.plot(hs_Q0_con_sw,hs_Q0_fut_sw,'g.')
plt.plot(hs_Q0_con_sw,fit_fn_Q0_sw(hs_Q0_con_sw),'g',label='Q0 no pert')
fit_Q3_sw=np.polyfit(hs_Q3_con_sw,hs_Q3_fut_sw,1)
fit_fn_Q3_sw=np.poly1d(fit_Q3_sw)
plt.plot(hs_Q3_con_sw,hs_Q3_fut_sw,'b.')
plt.plot(hs_Q3_con_sw,fit_fn_Q3_sw(hs_Q3_con_sw),'b',label='Q3 low sens')
fit_Q4_sw=np.polyfit(hs_Q4_con_sw,hs_Q4_fut_sw,1)
fit_fn_Q4_sw=np.poly1d(fit_Q4_sw)
plt.plot(hs_Q4_con_sw,hs_Q4_fut_sw,'y.')
plt.plot(hs_Q4_con_sw,fit_fn_Q4_sw(hs_Q4_con_sw),'y',label='Q4 low sens')
fit_Q14_sw=np.polyfit(hs_Q14_con_sw,hs_Q14_fut_sw,1)
fit_fn_Q14_sw=np.poly1d(fit_Q14_sw)
plt.plot(hs_Q14_con_sw,hs_Q14_fut_sw,'r.')
plt.plot(hs_Q14_con_sw,fit_fn_Q14_sw(hs_Q14_con_sw),'r',label='Q14 high sens')
fit_Q16_sw=np.polyfit(hs_Q16_con_sw,hs_Q16_fut_sw,1)
fit_fn_Q16_sw=np.poly1d(fit_Q16_sw)
plt.plot(hs_Q16_con_sw,hs_Q16_fut_sw,'c.')
plt.plot(hs_Q16_con_sw,fit_fn_Q16_sw(hs_Q16_con_sw),'c',label='Q16 high sens')
plt.legend(loc='best')
plt.xlabel('Significant Wave Height annual averages NW Scotland 1981-2010')
plt.ylabel('Significant Wave Height annual averages NW Scotland 2040-2069')
plt.title('Scatter plot of Significant Wave Height')
plt.show()
--
What I would like to do is display the R squared value next to the line of
best fits that I have made.
Does anyone know how to do this with matplotlib?
You can add plain text or annotations with arrows using any of the API
functions described here: http://matplotlib.org/1.3.1/users/text_intro.html
(information specifically regarding the text call is here:
http://matplotlib.org/1.3.1/api/pyplot_api.html#matplotlib.pyplot.text)
You can also use LaTeX typesetting here, so you can make the text something
like r'$R^2$' to display R^2 with nice typesetting. (I typically use raw
strings for matplotlib text strings with LaTeX formulas in them since LaTeX
makes extensive use of the \ character.)
The onus is on you, the programmer, to determine _where_ on the plot you want
the text to appear. Since you know what you are plotting, you can write a
quick helper function that will compute the optimal (to you) location for the
label to occur based on where things are drawn on the canvas. There is a
_lot_ of flexibility here so you should be able to get your text looking
exactly how (and where) you want it.
Hope this helps,
Jason
--
Jason M. Swails
BioMaPS,
Rutgers University
Postdoctoral Researcher
Hi Jason,
Thank you for your swift response - you solved my problem!
Sorry I took a while to get back to you.
Thanks again,
Jamie
--
https://mail.python.org/mailman/listinfo/python-list
Adding R squared value to scatter plot
I have made a plot using the following code:
python2.7
import netCDF4
import matplotlib.pyplot as plt
import numpy as np
swh_Q0_con_sw=netCDF4.Dataset('/data/cr1/jmitchel/Q0/swh/controlperiod/south_west/swhcontrol_swest_annavg1D.nc','r')
hs_Q0_con_sw=swh_Q0_con_sw.variables['hs'][:]
swh_Q3_con_sw=netCDF4.Dataset('/data/cr1/jmitchel/Q3/swh/controlperiod/south_west/swhcontrol_swest_annavg1D.nc','r')
hs_Q3_con_sw=swh_Q3_con_sw.variables['hs'][:]
swh_Q4_con_sw=netCDF4.Dataset('/data/cr1/jmitchel/Q4/swh/controlperiod/south_west/swhcontrol_swest_annavg1D.nc','r')
hs_Q4_con_sw=swh_Q4_con_sw.variables['hs'][:]
swh_Q14_con_sw=netCDF4.Dataset('/data/cr1/jmitchel/Q14/swh/controlperiod/south_west/swhcontrol_swest_annavg1D.nc','r')
hs_Q14_con_sw=swh_Q14_con_sw.variables['hs'][:]
swh_Q16_con_sw=netCDF4.Dataset('/data/cr1/jmitchel/Q16/swh/controlperiod/south_west/swhcontrol_swest_annavg1D.nc','r')
hs_Q16_con_sw=swh_Q16_con_sw.variables['hs'][:]
swh_Q0_fut_sw=netCDF4.Dataset('/data/cr1/jmitchel/Q0/swh/2050s/south_west/swh2050s_swest_annavg1D.nc','r')
hs_Q0_fut_sw=swh_Q0_fut_sw.variables['hs'][:]
swh_Q3_fut_sw=netCDF4.Dataset('/data/cr1/jmitchel/Q3/swh/2050s/south_west/swh2050s_swest_annavg1D.nc','r')
hs_Q3_fut_sw=swh_Q3_fut_sw.variables['hs'][:]
swh_Q4_fut_sw=netCDF4.Dataset('/data/cr1/jmitchel/Q4/swh/2050s/south_west/swh2050s_swest_annavg1D.nc','r')
hs_Q4_fut_sw=swh_Q4_fut_sw.variables['hs'][:]
swh_Q14_fut_sw=netCDF4.Dataset('/data/cr1/jmitchel/Q14/swh/2050s/south_west/swh2050s_swest_annavg1D.nc','r')
hs_Q14_fut_sw=swh_Q14_fut_sw.variables['hs'][:]
swh_Q16_fut_sw=netCDF4.Dataset('/data/cr1/jmitchel/Q16/swh/2050s/south_west/swh2050s_swest_annavg1D.nc','r')
hs_Q16_fut_sw=swh_Q16_fut_sw.variables['hs'][:]
fit_Q0_sw=np.polyfit(hs_Q0_con_sw,hs_Q0_fut_sw,1)
fit_fn_Q0_sw=np.poly1d(fit_Q0_sw)
plt.plot(hs_Q0_con_sw,hs_Q0_fut_sw,'g.')
plt.plot(hs_Q0_con_sw,fit_fn_Q0_sw(hs_Q0_con_sw),'g',label='Q0 no pert')
fit_Q3_sw=np.polyfit(hs_Q3_con_sw,hs_Q3_fut_sw,1)
fit_fn_Q3_sw=np.poly1d(fit_Q3_sw)
plt.plot(hs_Q3_con_sw,hs_Q3_fut_sw,'b.')
plt.plot(hs_Q3_con_sw,fit_fn_Q3_sw(hs_Q3_con_sw),'b',label='Q3 low sens')
fit_Q4_sw=np.polyfit(hs_Q4_con_sw,hs_Q4_fut_sw,1)
fit_fn_Q4_sw=np.poly1d(fit_Q4_sw)
plt.plot(hs_Q4_con_sw,hs_Q4_fut_sw,'y.')
plt.plot(hs_Q4_con_sw,fit_fn_Q4_sw(hs_Q4_con_sw),'y',label='Q4 low sens')
fit_Q14_sw=np.polyfit(hs_Q14_con_sw,hs_Q14_fut_sw,1)
fit_fn_Q14_sw=np.poly1d(fit_Q14_sw)
plt.plot(hs_Q14_con_sw,hs_Q14_fut_sw,'r.')
plt.plot(hs_Q14_con_sw,fit_fn_Q14_sw(hs_Q14_con_sw),'r',label='Q14 high sens')
fit_Q16_sw=np.polyfit(hs_Q16_con_sw,hs_Q16_fut_sw,1)
fit_fn_Q16_sw=np.poly1d(fit_Q16_sw)
plt.plot(hs_Q16_con_sw,hs_Q16_fut_sw,'c.')
plt.plot(hs_Q16_con_sw,fit_fn_Q16_sw(hs_Q16_con_sw),'c',label='Q16 high sens')
plt.legend(loc='best')
plt.xlabel('Significant Wave Height annual averages NW Scotland 1981-2010')
plt.ylabel('Significant Wave Height annual averages NW Scotland 2040-2069')
plt.title('Scatter plot of Significant Wave Height')
plt.show()
--
What I would like to do is display the R squared value next to the line of best
fits that I have made.
Does anyone know how to do this with matplotlib?
Thanks,
Jamie
--
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Saving a file as netCDF4 in Python
Dear all,
Apologies as this sounds like a very simple question but I can't find an answer
anywhere.
I have loaded a netCDF4 file into python as follows:
swh=netCDF4.Dataset('path/to/netCDFfile,'r')
I then isolate the variables I wish to plot:
hs=swh.variables['hs']
year=swh.variables['year']
I would then like to save these hs and year variables so that I don't have to
isolate them every time I want to plot them.
Any help would be much appreciated.
Cheers,
Jamie
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len() of unsized object - ks test
Hello all,
I am trying to perform a Kolmogorov-Smirnov test in Python but I'm having a few
difficulties.
# My files are netCDF so I import them as follows:
control=netCDF4.Dataset('/data/cr1/jmitchel/Q0/swh/controlperiod/south_west/swhcontrol_swest_concatannavg_1D.nc','r')
# The string is simply a 1D array
# Then performing the ks test:
kstest(control,'norm')
# I then get the following error:
File stdin, line 1, in module
File /usr/local/sci/lib/python2.7/site-packages/scipy/stats/stats.py, line
3413, in kstest
N = len(vals)
TypeError: len() of unsized object
Any ideas on why this isn't working would be great.
Thanks,
Jamie
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Re: len() of unsized object - ks test
On Friday, April 25, 2014 3:07:54 PM UTC+1, Jamie Mitchell wrote:
Hello all,
I am trying to perform a Kolmogorov-Smirnov test in Python but I'm having a
few difficulties.
# My files are netCDF so I import them as follows:
control=netCDF4.Dataset('/data/cr1/jmitchel/Q0/swh/controlperiod/south_west/swhcontrol_swest_concatannavg_1D.nc','r')
# The string is simply a 1D array
# Then performing the ks test:
kstest(control,'norm')
# I then get the following error:
File stdin, line 1, in module
File /usr/local/sci/lib/python2.7/site-packages/scipy/stats/stats.py,
line 3413, in kstest
N = len(vals)
TypeError: len() of unsized object
Any ideas on why this isn't working would be great.
Thanks,
Jamie
Thanks for your help.
Steven your right I wasn't reading in the file on netCDF4.Dataset, I was just
opening it. I have rectified it now - a silly mistake!
Thanks again,
Jamie
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Line of best fit
I am new to python so apologies for the ignorance with this question.
How would I apply a line of best fit to a plot?
My data are netCDF4 data files and this is essentially what I have done so far:
swh1=netCDF4.Dataset('filename','r')
hs1=swh1.variables['hs']
swh2=netCDF4.Dataset('filename'.'r')
hs2=swh2.variables['hs']
plt.plot(hs1,hs2,'.')
Cheers,
Jamie
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Memory error
Hello all,
I'm afraid I am new to all this so bear with me...
I am looking to find the statistical significance between two large netCDF data
sets.
Firstly I've loaded the two files into python:
swh=netCDF4.Dataset('/data/cr1/jmitchel/Q0/swh/controlperiod/averages/swh_control_concat.nc',
'r')
swh_2050s=netCDF4.Dataset('/data/cr1/jmitchel/Q0/swh/2050s/averages/swh_2050s_concat.nc',
'r')
I have then isolated the variables I want to perform the pearson correlation on:
hs=swh.variables['hs']
hs_2050s=swh_2050s.variables['hs']
Here is the metadata for those files:
print hs
type 'netCDF4.Variable'
int16 hs(time, latitude, longitude)
standard_name: significant_height_of_wind_and_swell_waves
long_name: significant_wave_height
units: m
add_offset: 0.0
scale_factor: 0.002
_FillValue: -32767
missing_value: -32767
unlimited dimensions: time
current shape = (86400, 350, 227)
print hs_2050s
type 'netCDF4.Variable'
int16 hs(time, latitude, longitude)
standard_name: significant_height_of_wind_and_swell_waves
long_name: significant_wave_height
units: m
add_offset: 0.0
scale_factor: 0.002
_FillValue: -32767
missing_value: -32767
unlimited dimensions: time
current shape = (86400, 350, 227)
Then to perform the pearsons correlation:
from scipy.stats.stats import pearsonr
pearsonr(hs,hs_2050s)
I then get a memory error:
Traceback (most recent call last):
File stdin, line 1, in module
File /usr/local/sci/lib/python2.7/site-packages/scipy/stats/stats.py, line
2409, in pearsonr
x = np.asarray(x)
File /usr/local/sci/lib/python2.7/site-packages/numpy/core/numeric.py, line
321, in asarray
return array(a, dtype, copy=False, order=order)
MemoryError
This also happens when I try to create numpy arrays from the data.
Does anyone know how I can alleviate theses memory errors?
Cheers,
Jamie
--
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Re: Memory error
On Monday, March 24, 2014 11:32:31 AM UTC, Jamie Mitchell wrote:
Hello all,
I'm afraid I am new to all this so bear with me...
I am looking to find the statistical significance between two large netCDF
data sets.
Firstly I've loaded the two files into python:
swh=netCDF4.Dataset('/data/cr1/jmitchel/Q0/swh/controlperiod/averages/swh_control_concat.nc',
'r')
swh_2050s=netCDF4.Dataset('/data/cr1/jmitchel/Q0/swh/2050s/averages/swh_2050s_concat.nc',
'r')
I have then isolated the variables I want to perform the pearson correlation
on:
hs=swh.variables['hs']
hs_2050s=swh_2050s.variables['hs']
Here is the metadata for those files:
print hs
type 'netCDF4.Variable'
int16 hs(time, latitude, longitude)
standard_name: significant_height_of_wind_and_swell_waves
long_name: significant_wave_height
units: m
add_offset: 0.0
scale_factor: 0.002
_FillValue: -32767
missing_value: -32767
unlimited dimensions: time
current shape = (86400, 350, 227)
print hs_2050s
type 'netCDF4.Variable'
int16 hs(time, latitude, longitude)
standard_name: significant_height_of_wind_and_swell_waves
long_name: significant_wave_height
units: m
add_offset: 0.0
scale_factor: 0.002
_FillValue: -32767
missing_value: -32767
unlimited dimensions: time
current shape = (86400, 350, 227)
Then to perform the pearsons correlation:
from scipy.stats.stats import pearsonr
pearsonr(hs,hs_2050s)
I then get a memory error:
Traceback (most recent call last):
File stdin, line 1, in module
File /usr/local/sci/lib/python2.7/site-packages/scipy/stats/stats.py,
line 2409, in pearsonr
x = np.asarray(x)
File /usr/local/sci/lib/python2.7/site-packages/numpy/core/numeric.py,
line 321, in asarray
return array(a, dtype, copy=False, order=order)
MemoryError
This also happens when I try to create numpy arrays from the data.
Does anyone know how I can alleviate theses memory errors?
Cheers,
Jamie
Just realised that obviously pearson correlation requires two 1D arrays and
mine are 3D, silly mistake!
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[issue16885] SQLite3 iterdump ordering
New submission from Jamie Spence: After dumping a database with iterdump, trying to execute the dumped SQL sometimes results in an error because the statement order may be wrong. In my case, it is a view that is being created before the view it is referencing. Would ordering the sqlite_master table view query in dump.py by ID fix this issue? -- messages: 179267 nosy: Jamie.Spence priority: normal severity: normal status: open title: SQLite3 iterdump ordering type: behavior versions: Python 2.7 ___ Python tracker rep...@bugs.python.org http://bugs.python.org/issue16885 ___ ___ Python-bugs-list mailing list Unsubscribe: http://mail.python.org/mailman/options/python-bugs-list/archive%40mail-archive.com
Re: New to python, do I need an IDE or is vim still good enough?
* Yuvraj Sharma aleast...@gmail.com [2012-12-28 01:37:23 -0800]: Use IDLE -- http://mail.python.org/mailman/listinfo/python-list The OP is already a proficient C, C++, perl, ... hacker using console based tools and hardcore UNIX editors like vi(1) - I doubt he'll stay with IDLE for very long - once you've got accustomed to the UNIX environment and the command-line it's difficult and undesirable, in my experience, to switch to GUI stuff. Stick with what you've been using for the last couple of decades. These tools have stood the test of time for a good reason: they're powerful, efficient and made for the task of programming. Jamie -- Primary Key: 4096R/1D31DC38 2011-12-03 Key Fingerprint: A4B9 E875 A18C 6E11 F46D B788 BEE6 1251 1D31 DC38 -- http://mail.python.org/mailman/listinfo/python-list
Re: New to python, do I need an IDE or is vim still good enough?
* mogul morten.gulda...@gmail.com [2012-12-27 12:01:16 -0800]: 'Aloha! I'm new to python, got 10-20 years perl and C experience, all gained on unix alike machines hacking happily in vi, and later on in vim. Now it's python, and currently mainly on my kubuntu desktop. Do I really need a real IDE, as the windows guys around me say I do, or will vim, git, make and other standalone tools make it the next 20 years too for me? Oh, by the way, after 7 days I'm completely in love with this python thing. I should have made the switch much earlier! /mogul %-) If these are the tools you're used to, stick with them. I have a tmux session with however many terminals open I need. I use the traditional vi editor (not vim) and the python shell/interpreter as well as the UNIX tools I need. A web browser and a separate urxvt window for my mutt client when I need to mail a list for some help. That's it. The benefit of the tmux client (terminal multiplexer) is that I can see all the screens at the same time and quickly switch between them. I believe Linux has screen(1) which does the same thing. -- http://mail.python.org/mailman/listinfo/python-list
Re: Brython - Python in the browser
* Ian Kelly ian.g.ke...@gmail.com [2012-12-19 17:54:44 -0700]: On Wed, Dec 19, 2012 at 5:07 PM, Terry Reedy tjre...@udel.edu wrote: That says that my browser, Firefox 17, does not support HTML5. Golly gee. I don't think any browser support5 all of that moving target, and Gecko apparently supports about as large a subset as most. https://en.wikipedia.org/wiki/Comparison_of_layout_engines_%28HTML5%29 It is possible the FF still does not support the particular feature needed for the clock, but then the page should say just that. Has the latest FF (17) actually been tested? It works for me using FF 17.0.1. I'm using FF 13 on OpenBSD and it works for me too. -- http://mail.python.org/mailman/listinfo/python-list
Re: Obnoxious postings from Google Groups
/ ru...@yahoo.com wrote on Fri 2.Nov'12 at 11:39:10 -0700 / (I also hope I haven't just been suckered by a troll attempt, windows/unix is better then unix/windows being an age-old means of trolling.) No, i'm not a troll. I was just adding my opinion to the thread, I assumed that was allowed. I didn't say UNIX is better than Windows, did I; I just feel that Windows is not -- for me anyway -- the most suitable plaform for learning about the science of computing and coding, etc... being a computer science student that's the view i have and share with those I learn with and from. Why must people be accused of trolling everytime they make a statement that conveys a preference over one platform or language, for example, than the other. Provoking someone by labeling them a troll or implying they might be is a bit childish really. -- http://mail.python.org/mailman/listinfo/python-list
Re: Obnoxious postings from Google Groups
/ ru...@yahoo.com wrote on Thu 1.Nov'12 at 15:08:26 -0700 / On 11/01/2012 03:55 AM, Jamie Paul Griffin wrote: Anybody serious about programming should be using a form of UNIX/Linux if you ask me. It's inconceivable that these systems should be avoided if you're serious about Software Engineering and Computer Science, etc. For UNIX there are loads of decent news reading software and mail user agents to learn and use. slrn is a good one and point it at gmane.org as someone else pointed out. I can't even imagine using a browser or Google Groups, etc. now. Are you saying that this group is only for serious programmers? I don't see where my comments suggested that this group is only for serious programmers. I simply believe that the UNIX platform, in whatever form, is better placed and designed for all sorts of computing and engineering projects. The history of UNIX speaks for itself. Many Universities that offer respected and credible science based degree programmes, namely engineering and computing programmes, strongly encourage students to become competent with UNIX systems. Windows in my opinion is really for those who use the internet on a casual basis or in a commercial environment where its staff are not necessarily computer literate and therefore need a platform that they can use which doesn't require them to learn more complex techniques and protocols. But, having said that, I'm not against Windows at all. I use it frequently and enjoy using it most of the time. serious is also a matter of opinion. I have some serious programmer friends who maintain, in complete sincerity, that serious programmers should not waste time on slow, script-kiddie languages like Python, but should be developing their skills with serious professional languages like Java, C#, etc. That is a narrow minded approach. different languages serve different purposes and it's down to the developer to use which language she needs to achieve what it is they've set out to do. Sometimes, basic shell scripts can be extremely powerful for certain tasks; other needs will require something different. I certainly wouldn't describe Python as a script-kiddie language. It's extremely powerful and modern. So there ;-P lol -- http://mail.python.org/mailman/listinfo/python-list
Re: datetime issue
/ ru...@yahoo.com wrote on Thu 1.Nov'12 at 15:00:48 -0700 / * In Search dialog clicked on the Search in folder dropdown after an earlier search and TB crashed (disappeared along with the new message I was editing.) [3.0.1] * Search for japanese text in body no longer works (never finds text even when it exists). [3.0.1] Used to work. * Each mail message displays useless header info that uses 25% of the available vertical space. * When editing a reply message, typing a return at eol results in two blank lines inserted. * When editing message, siometimes edit cursor disappears tho editing still seems to work normally. * Requires voodoo to create hmtl new message when default is plain text or visa versa. Have to hold shift key while clicking write button. Shift while choosing new, reply, etc in menu doesn't work. * Frequently, clinking on a usenet newsgroup results in TB freeze. Only solution is to remove group and re-add later. (Problem since 2.x days.) * Frequently after an apparently normal shutdown, attempt to restart results in TB is already running error. * Some folders in the folder tree view are greyed out and not selectable even though they have no visible different properties than selectable ones. Don't know how they got that way. * Clicking on a folder in the folder tree pane results in a pop- up dialog this folder is not selectable that has to be dismissed, even though one is trying to get it's properties, or is selecting it to create a subfolder. * Messages change from read to unread in folders at random when folder is accessed, or even when it is not accessed. [gone in 3.0.3?] * Interminttently, when I click a usenet message to view it, the contents pane remains blank. Contents of that message remain blank foreever. [new with 3.0.1]. * When TB main window closed while editing an email, can no longer save the email, even if the TB main window is reopened. * Counts of new messages in usenet groups are often wildly high. * When opening up a usenet server, status bar reports no new messages on server even though TB then updates the groups with the new messages that *are* on the server. [new in 3.0.1] * After upgrade to TB-3.0, opening a usenet server results not only in the group being scanned for new messages in each group (as before) but also the headers for all those new messages being downloaded (slow on a dialup connection and a waste of time if I don't intend to read anything in that group). No obvious way to revert to original behaviour. * Even tho the number of unread messages listed beside a usenet group in the folder pane is less than the download limit, I sometimes get pop-up asking how many messages to download, when I access the group. (side effect of above problem I think.) * Sometimes TB downloads two copies of each header. * When I compress folders, get a series of several dozen pop- up messages (each requiring a click on OK) telling me that foplder xx is not selectable. * Copy-paste from TB to other app fails if TB is closed before the paste -- the paste buffer appears empty [TB-3.0b4] * Copy paste fails by removing text (forgot if it is just the copied text or other text) in the TB message when pasted somewhere else. [TB-2?] * After upgrade to TB-3.0x, i no longer see a way to create a new imap subfolder. Had to create it using MSOE. * After upgrade to TB-3.0x double clicking on attached .jpg image no longer opens it -- only option is to save and open outside of TB. phfft. * HTF do you change the font size for plain text message composition? Prefs has a setting for html but... * search of body for multiple anded text never ends if one of the search boxes is empty. * Search stop button doesn't stop search. * One group frequently, without any action on my part, read thousands of old articles, showing them as unread, and when I choose one, responds with article expired message. (tb-3.0.4) [ ... ] With a list of problems like that maybe the time spent on learning how to use a Usenet client or mua that is properly written would be worthwhile. Personally I haven't used the Google Groups interface, and most likely never will so I can't really comment on how it performs or how nice it is to use but if you're happy with it that's the main thing. But you can't deny that it does cause irritating problems for other people trying to read information sent from it. -- http://mail.python.org/mailman/listinfo/python-list
Re: Obnoxious postings from Google Groups
/ Robert Miles wrote on Wed 31.Oct'12 at 0:39:02 -0500 / For those of you running Linux: You may want to look into whether NoCeM is compatible with your newsreader and your version of Linux. It checks newsgroups news.lists.filters and alt.nocem.misc for lists of spam posts, and will automatically hide them for you. Not available for other operating systems, though, except possibly Unix. Anybody serious about programming should be using a form of UNIX/Linux if you ask me. It's inconceivable that these systems should be avoided if you're serious about Software Engineering and Computer Science, etc. For UNIX there are loads of decent news reading software and mail user agents to learn and use. slrn is a good one and point it at gmane.org as someone else pointed out. I can't even imagine using a browser or Google Groups, etc. now. -- http://mail.python.org/mailman/listinfo/python-list
Re: Obnoxious postings from Google Groups
/ Steven D'Aprano wrote on Wed 31.Oct'12 at 22:33:16 + / On Wed, 31 Oct 2012 12:32:57 -0700, rurpy wrote: I don't killfile merely for posting from Gmail or Google Groups, but regarding your second point, it has seemed to me for some years now that Gmail is the new Hotmail, which was the new AOL. Whenever there is an inane, lazy, mind-numbingly stupid question or post, chances are extremely high that the sender has a Gmail address. That's a bit harsh but then, sadly there's some truth in it. I subscribe to a number of technical mailing lists, like that of my OS OpenBSD and the problem doesn't exist there whether they use Gmail or Hotmail, etc, or not. This and the tutor python list are the two I have the most problems with formatting. Some people just don't seem to give a shit about sending horrid html and other irritating formatted mail in spite of being asked not to do so. -- http://mail.python.org/mailman/listinfo/python-list
Re: Functional way to compare things inside a list
[ Ian Kelly wrote on Sat 22.Sep'12 at 0:22:43 -0600 ] On Fri, Sep 21, 2012 at 7:25 PM, Steven D'Aprano steve+comp.lang.pyt...@pearwood.info wrote: On Fri, 21 Sep 2012 14:49:55 -0600, Ian Kelly wrote: On Fri, Sep 21, 2012 at 1:54 PM, 8 Dihedral dihedral88...@googlemail.com wrote: I don't think functional aspects are only marked as lazy programming. He wrote lazy evaluation, not lazy programming. Two entirely different things. For the record, the consensus here is that 8 Dihedral is probably a bot. It appears to be a pretty good bot, I haven't spotted it making any egregious or obvious grammatical mistakes, but the semantics of its posts don't seem quite human. I'm aware of that, although sometimes the posts seem coherent enough that I think maybe it's not. Especially the ones where it posts almost-working code snippets, complete with obvious typos. Then it posts a complete non sequitur like the reply to my reply in this thread, and the illusion is shattered. I find this intriguing, I had no idea bots existed to post to mailing lists in this way. What's the point of them? -- http://mail.python.org/mailman/listinfo/python-list
Re: Obnoxious postings from Google Groups (was: datetime issue)
[ Joel Goldstick wrote on Sun 16.Sep'12 at 11:57:56 -0400 ] email client to python-list@python.org If using Windows I would certainly use Thunderbird or even slrn news reader - I believe there is a version for Windows. Or you could install Interix subsystem which provides UNIX tools for Windows 7 Ultimate or Professional. You'd then have some more choice of MUA client or newsreader client in that environment. Cygwin is another alternative. UNIX systems just use whatever email client you like and subscribe to the list as explained several times by others. Fortunately for me I've got procmail deleting double posts because they are annoying. -- http://mail.python.org/mailman/listinfo/python-list
Re: Which Version of Python?
[ Ramchandra Apte wrote on Tue 11.Sep'12 at 19:58:29 -0700 ] On Tuesday, 11 September 2012 22:19:08 UTC+5:30, Charles Hottel wrote: I have a lot of programming experience in many different languages and now I want to learn Python. Which version do you suggest I download, Python 2.x or Python 3.x ? Also why should I prefer one over the other? Right now I am thinkng Python 3.x as it has been out since 2008, but I have some concerns about backward compatibility with older packages that I might want to use. Thanks for your ideas and help. Use Python 3 because most packages support Python 3. Python 2.7 has many features that Python 3 has so it will require minimal effort to write Python 2.x code. When I first started to learn Python - about a year ago - I got myself a book which focuses on version 3 but is does also include Version 2. The author wrote that because a number of supporting libraries have not been updated to work in Python 3, and where it is felt that the theory still needs to be expounded upon Python 2.x will be used in lieu of Python 3. I personally, as a beginner, have found this approach helpful. Although, when this book was published Python 3.1 was the latest release, so of course since then said libraries most probably have been updated. So, as a fellow beginner i'd go for version 3.x. Jamie. -- http://mail.python.org/mailman/listinfo/python-list
Re: Books?
[ Virgil Stokes wrote on Wed 22.Aug'12 at 16:34:40 +0200 ] On 22-Aug-2012 16:04, Steven D'Aprano wrote: On Tue, 21 Aug 2012 18:36:50 -0700, Anonymous Group wrote: What books do you recomend for learning python? Preferably free and/or online. Completely by coincidence, I have just discovered, and I mean *literally* just a few minutes ago, this book: http://www.springer.com/mathematics/computational+science+%26+engineering/book/978-3-642-30292-3 http://codingcat.com/knjige/python/A%20Primer%20on%20Scientific%20Programming%20with%20Python.pdf I wish it had existed when I was a beginner! I haven't read the whole thing, but dammit it looks like exactly the sort of book I would have adored as a newbie. (Your mileage may vary.) I second this --- this is a very good book IMHO. I have the first edition (2009) and have found it very useful. Good tip! absolutely. I've been reading it most of last night, certainly a great learning resource. -- http://mail.python.org/mailman/listinfo/python-list
Re: Books?
[ Mark Lawrence wrote on Wed 22.Aug'12 at 8:43:58 +0100 ] On 22/08/2012 02:36, Anonymous Group wrote: What books do you recomend for learning python? Preferably free and/or online. Search for the Alan Gauld tutorial. I've never used it myself, but OTOH I've never heard anybody complain about it!!! As someone else has already mentioned it, I'd highly recommend Dive Into Python I bought Beginning Python - Using Python 2.6 and 3.1 by James Payne, published by Wrox www.wrox.com. I've found it quite good so far, it's pretty comprehensive. -- http://mail.python.org/mailman/listinfo/python-list
Re: [ANNC] pybotwar-0.8
[ Ramchandra Apte wrote on Sat 18.Aug'12 at 19:21:03 +0530 ] I'll be using Google Groups (hopefully it won't top-post by default) to post stuff. You are encouraged to get used to it i'm afraid as any mailing list you use, its users will prefer you to use the correct formatting of responses. You can change the settings in Gmail web interface or use an MUA and configure that. -- http://mail.python.org/mailman/listinfo/python-list
[issue10539] Regular expression not checking 'range' element on 1st char in string.
New submission from Jamie Murray txr...@gmail.com: The first char in a word is omitted from being checked against the 'range' element of the 1st part of this expression. The second char is properly checked to see if it's in range # Desired safe string to expect goodString = f42e6be1-29bf-4f3c-ba58-1ae1d9ca5f88 # Test string to return False if it's not within reg ex range. # but still returns a false positive even though the g at the start is outside of a-f range. badString = g42e6be1-29bf-4f3c-ba58-1ae1d9ca5f88 # 2nd test string which does return a false result correctly. otherBadString = fg2e6be1-29bf-4f3c-ba58-1ae1d9ca5f88 See attached file for example. Python 2.5.4 (r254:67916, Dec 23 2008, 15:19:34) [MSC v.1400 64 bit (AMD64)] on win32 -- components: Regular Expressions files: RegExPyBug.py messages: 122461 nosy: TxRxFx priority: normal severity: normal status: open title: Regular expression not checking 'range' element on 1st char in string. type: behavior versions: Python 2.5 Added file: http://bugs.python.org/file19823/RegExPyBug.py ___ Python tracker rep...@bugs.python.org http://bugs.python.org/issue10539 ___ ___ Python-bugs-list mailing list Unsubscribe: http://mail.python.org/mailman/options/python-bugs-list/archive%40mail-archive.com
[issue10539] Regular expression not checking 'range' element on 1st char in string.
Jamie Murray txr...@gmail.com added the comment: Apologies, sincere and most humble apolgies doh! On 26 Nov 2010 18:51, Georg Brandl rep...@bugs.python.org wrote: Georg Brandl ge...@python.org added the comment: I don't think so; closing as invalid. -- nosy: +georg.brandl resolution: - invalid status: open - closed ___ Python tracker rep...@bugs.python.org http://bugs.python.org/issue10539 ___ -- Added file: http://bugs.python.org/file19829/unnamed ___ Python tracker rep...@bugs.python.org http://bugs.python.org/issue10539 ___pApologies, sincere and most humble apolgies doh!/p div class=gmail_quoteOn 26 Nov 2010 18:51, quot;Georg Brandlquot; lt;a href=mailto:rep...@bugs.python.org;rep...@bugs.python.org/agt; wrote:br type=attributiongt; brgt; Georg Brandl lt;a href=mailto:ge...@python.org;ge...@python.org/agt; added the comment:br gt; brgt; I don#39;t think so; closing as invalid.brgt; brgt; --brgt; nosy: +georg.brandlbrgt; resolution: -gt; invalidbrgt; status: open -gt; closedbrgt; brgt; ___br gt; Python tracker lt;a href=mailto:rep...@bugs.python.org;rep...@bugs.python.org/agt;brgt; lt;a href=http://bugs.python.org/issue10539;http://bugs.python.org/issue10539/agt;brgt; ___br /div ___ Python-bugs-list mailing list Unsubscribe: http://mail.python.org/mailman/options/python-bugs-list/archive%40mail-archive.com
[issue7140] imp.new_module does not function correctly if the module is returned from a function and used directly
New submission from Jamie Kirkpatrick j...@kirkconsulting.co.uk: See the testcase included. If you instead assign the result of the get_module() call to a variable and then make the call to the function defined in that module it works as expected. -- components: Library (Lib) files: testcase.py messages: 94082 nosy: jkp severity: normal status: open title: imp.new_module does not function correctly if the module is returned from a function and used directly type: behavior versions: Python 2.5, Python 2.6 Added file: http://bugs.python.org/file15133/testcase.py ___ Python tracker rep...@bugs.python.org http://bugs.python.org/issue7140 ___ ___ Python-bugs-list mailing list Unsubscribe: http://mail.python.org/mailman/options/python-bugs-list/archive%40mail-archive.com
[issue7140] imp.new_module does not function correctly if the module is returned from a function and used directly
Jamie Kirkpatrick j...@kirkconsulting.co.uk added the comment: Updated the testcase to show that the __dict__ for the module is incorrect unless the module is assigned to a temp variable. -- Added file: http://bugs.python.org/file15134/testcase.py ___ Python tracker rep...@bugs.python.org http://bugs.python.org/issue7140 ___ ___ Python-bugs-list mailing list Unsubscribe: http://mail.python.org/mailman/options/python-bugs-list/archive%40mail-archive.com
Remote uptime with win32pdh
I'm new to python and I'm trying to write a script which takes the computer name from the variable 'name' and gets the uptime. What I have so far: query = win32pdh.OpenQuery() counter = win32pdh.AddCounter(query, r'\System\System Up Time') win32pdh.CollectQueryData(query) var1, val = win32pdh.GetFormattedCounterValue(counter, win32pdh.PDH_FMT_LONG) uptime = val / 3600 print -- Uptime: %s hours % uptime That works just fine for the local system, but I'm at a loss figuring out how to make it gater that data from a remote system. Any help would be much appreciated! -- http://mail.python.org/mailman/listinfo/python-list
Re: Remote uptime with win32pdh
On Sep 29, 1:08 pm, Jamie jamie.iva...@gmail.com wrote: I'm new to python and I'm trying to write a script which takes the computer name from the variable 'name' and gets the uptime. What I have so far: query = win32pdh.OpenQuery() counter = win32pdh.AddCounter(query, r'\System\System Up Time') win32pdh.CollectQueryData(query) var1, val = win32pdh.GetFormattedCounterValue(counter, win32pdh.PDH_FMT_LONG) uptime = val / 3600 print -- Uptime: %s hours % uptime That works just fine for the local system, but I'm at a loss figuring out how to make it gater that data from a remote system. Any help would be much appreciated! Oh, and I can't use WMI because WMI doesn't seem to work in Portable Python (long story) -- http://mail.python.org/mailman/listinfo/python-list
Re: Remote uptime with win32pdh
On Sep 29, 1:19 pm, Jamie jamie.iva...@gmail.com wrote: On Sep 29, 1:08 pm, Jamie jamie.iva...@gmail.com wrote: I'm new to python and I'm trying to write a script which takes the computer name from the variable 'name' and gets the uptime. What I have so far: query = win32pdh.OpenQuery() counter = win32pdh.AddCounter(query, r'\System\System Up Time') win32pdh.CollectQueryData(query) var1, val = win32pdh.GetFormattedCounterValue(counter, win32pdh.PDH_FMT_LONG) uptime = val / 3600 print -- Uptime: %s hours % uptime That works just fine for the local system, but I'm at a loss figuring out how to make it gater that data from a remote system. Any help would be much appreciated! Oh, and I can't use WMI because WMI doesn't seem to work in Portable Python (long story)- Hide quoted text - - Show quoted text - path = win32pdh.MakeCounterPath((name, r'System', None, None, 0, System Up Time)) query = win32pdh.OpenQuery() handle = win32pdh.AddCounter(query, path) win32pdh.CollectQueryData(query) seconds = win32pdh.GetFormattedCounterValue(handle, win32pdh.PDH_FMT_LONG | win32pdh.PDH_FMT_NOSCALE )[ 1 ] uptime = seconds / 3600 that works! ;) -- http://mail.python.org/mailman/listinfo/python-list
detmining name during an assignment
I have an app that uses Python scripting. When a user creates a new object: objName = newObject() I'd like the newObject be able to use objName as its internal name. So, if a user says: cube1 = Cube() A cube1 object should apear in the scene list. I believe this means I need to determine that a namespace assignment is going on from inside the object's init code or by using properties. I've searched the web but can't find a simple answer. Is there some way to use the inspect module get source code functoins? How would I get the code for the current interpreter line causing the init code to execute? Thanks very much in advance, Jamie Riotto -- http://mail.python.org/mailman/listinfo/python-list
Re: detmining name during an assignment
On Fri, Sep 18, 2009 at 1:10 PM, Gabriel Genellina gagsl-...@yahoo.com.ar wrote: En Fri, 18 Sep 2009 14:38:08 -0300, Christian Heimes li...@cheimes.de escribió: Jamie Riotto schrieb: I have an app that uses Python scripting. When a user creates a new object: objName = newObject() I'd like the newObject be able to use objName as its internal name. As the others already explained to you there is no way to archive your goal with an assignment to a local or global variable. But you can follow a different approach: class Scene(object): def __setattr__(self, name, value): super(Scene, self).__setattr__(name value) if isinstance(value, SceneObject): value.name = name value.scene = self class SceneObject(object): pass class Cube(SceneObject): pass scene = Scene() scene.cube1 = Cube() As the OP said it's being used for scripting some application, presumably the application can control the environment on which the script is run. One may use the Scene class above as the globlal scope when executing the script: scene = Scene() code = cube1 = Cube(); print cube1.name exec code in Scene (well, not exactly, Scene should inherit from dict and override __setitem__ instead, but you get the idea) -- Gabriel Genellina -- http://mail.python.org/mailman/listinfo/python-list Thanks for the detailed clarifications and suggestions. I understand the problem a lot better now. However, I'll have to keep looking for a more elegant solution. Telling a user that typing: cube1 = Cube(name = cube1) is a good thing because its pythonic is somehow unsatisfying. Also, in the last suggestion about execution the script in the Scene Handler global scope, well thats exactly what I do, and yes, cube1=Cube, print cube1.name works great. The issue is say perhaps that cube then collides with something called sphere1. How does cube1 know that it hit sphere1 and not just a sphere object. Since I can execute the scripts one line at a time, I suppose I could search dictionaries for new names pointing to the same object after every execution, but Yuck. Perhaps the best approach is a preprossesor that looks for lines of the form name = class() and adds in the class(name = name) behind the scenes. Thanks again - jamie -- http://mail.python.org/mailman/listinfo/python-list
Problem with winreg - The object is not a PyHKEY object
My goal is to remotely remove the registry keys for McAfee. I don't
know how winreg handles an exception if a key doesn't exist, but I
setup my script to skip the exception. But it doesn't seem to work
right.. I think the script should be self explanitory, please help!
Please forgive me, but I'm a python newbie.
## SCRIPT ##
import _winreg
print Removing McAfee registry entries
hkey = _winreg.ConnectRegistry(r'\
\00439140PC',_winreg.HKEY_LOCAL_MACHINE)
try:
_winreg.DeleteKey('SYSTEM\CurrentControlSet\Enum
\Root','LEGACY_MFEAPFK')
except:
pass
#try:
_winreg.DeleteKey('\SYSTEM\CurrentControlSet\Enum
\Root','LEGACY_MFEAVFK')
#except:
# pass
try:
_winreg.DeleteKey('\SYSTEM\CurrentControlSet\Enum
\Root','LEGACY_MFEBOPK')
except:
pass
try:
_winreg.DeleteKey('\SYSTEM\CurrentControlSet\Enum
\Root','LEGACY_MFEHIDK')
except:
pass
try:
_winreg.DeleteKey('\SYSTEM\CurrentControlSet\Enum
\Root','LEGACY_MFEHIDK01')
except:
pass
try:
_winreg.DeleteKey('\SYSTEM\CurrentControlSet\Enum
\Root','LEGACY_MFERKDK')
except:
pass
try:
_winreg.DeleteKey('\SYSTEM\CurrentControlSet\Enum
\Root','LEGACY_MFETDIK')
except:
pass
try:
_winreg.DeleteKey('\SYSTEM\CurrentControlSet\Enum
\Root','LEGACY_NAIAVFILTER1')
except:
pass
try:
_winreg.DeleteKey('\SYSTEM\CurrentControlSet\Enum
\Root','LEGACY_NAIAVFILTER101')
except:
pass
try:
_winreg.DeleteKey('\SYSTEM\CurrentControlSet\Enum
\Root','LEGACY_MCSHIELD')
except:
pass
try:
_winreg.DeleteKey('\SYSTEM\CurrentControlSet\Enum
\Root','MCTASKMANAGER')
except:
pass
try:
_winreg.DeleteKey('\SOFTWARE','McAfee')
except:
pass
try:
_winreg.DeleteKey('\SOFTWARE','Network Associates')
except:
pass
try:
_winreg.DeleteKey('\SYSTEM\CurrentControlSet\Services','AlertManager')
except:
pass
try:
_winreg.DeleteKey('\SYSTEM\CurrentControlSet
\Services','McAfeeFramework')
except:
pass
try:
_winreg.DeleteKey('\SYSTEM\CurrentControlSet\Services','McShield')
except:
pass
try:
_winreg.DeleteKey('\SYSTEM\CurrentControlSet
\Services','McTaskManager')
except:
pass
try:
_winreg.DeleteKey('\SYSTEM\CurrentControlSet\Services','mfeapfk')
except:
pass
try:
_winreg.DeleteKey('\SYSTEM\CurrentControlSet\Services','mfeavfk')
except:
pass
try:
_winreg.DeleteKey('\SYSTEM\CurrentControlSet\Services','mfebopk')
except:
pass
try:
_winreg.DeleteKey('\SYSTEM\CurrentControlSet\Services','mfehidk')
except:
pass
try:
_winreg.DeleteKey('\SYSTEM\CurrentControlSet\Services','mfehidk01')
except:
pass
try:
_winreg.DeleteKey('\SYSTEM\CurrentControlSet\Services','mferkdk')
except:
pass
try:
_winreg.DeleteKey('\SYSTEM\CurrentControlSet\Services','mfetdik')
except:
pass
try:
_winreg.DeleteKey('\SYSTEM\CurrentControlSet\Services','NaiAvFilter1')
except:
pass
try:
_winreg.DeleteKey('\SYSTEM\CurrentControlSet
\Services','NaiAvFilter101')
except:
pass
## END SCRIPT ##
## OUTPUT ##
Removing McAfee registry entries
Traceback (most recent call last):
File uninstallMcafee.py, line 11, in module
_winreg.DeleteKey('\SYSTEM\CurrentControlSet\Enum
\Root','LEGACY_MFEAVFK')
TypeError: The object is not a PyHKEY object
## END OUTPUT ##
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wxPython BoxSizer
Simple question, i just can't make it work. I need to center a StaticText component in its parent (Panel). I want to do this with BoxSizer(s). if i use: box = wx.BoxSizer(wx.VERTICAL) #or wx.HORIZONTAL box.Add(myText,0,wx.ALIGN_CENTER) parentPanel.Sizer = box i can get it to center either vertically or horizontally, but not both (i.e. the center). I've tried myText.CenterOnParent but i need to handle to Size event to move the text when the panel is resized and i don't want to have to do this. thanks, Jamie -- http://mail.python.org/mailman/listinfo/python-list
Re: wxPython BoxSizer
Try the style=wx.CENTER like this: box.Add(myText,0,wx.CENTER) tried but i still get the same result. The text is either at the top of the panel (centered) or in the middle (on the left side). If i manually call CenterOnParent when the panel is resized it goes to the center but i want to get the sizers to work correctly for this. FYI: There's a great wxPython mailing list too. Check it out here:http://wxpython.org/maillist.php thanks, i will take a look. Jamie -- http://mail.python.org/mailman/listinfo/python-list
Re: wxPython BoxSizer
FYI: There's a great wxPython mailing list too. Check it out here:http://wxpython.org/maillist.php thanks, i will take a look. Here is the answer i got from the mailing list (and it works) Try adding a spacer on both sides of text. i.e) box.AddStretchSpacer() box.Add(myText, 0, wx.ALIGN_CENTER) box.AddStretchSpacer() jamie -- http://mail.python.org/mailman/listinfo/python-list
[issue2211] Cookie.Morsel interface needs update
Jamie Bliss added the comment: Sure, I'll do that. __ Tracker [EMAIL PROTECTED] http://bugs.python.org/issue2211 __ ___ Python-bugs-list mailing list Unsubscribe: http://mail.python.org/mailman/options/python-bugs-list/archive%40mail-archive.com
[issue2211] Cookie.Morsel interface needs update
Jamie Bliss added the comment: * Should be backwards compatible with people who actually use Morsel * Didn't even attempt to document it * Instead of having the Morsel dict being filled initially, unset attributes are, well, unset * .key, .value, and .coded_value are now property()s * .value is considered the actual value (eg, .coded_value is ignore for __eq__()) __ Tracker [EMAIL PROTECTED] http://bugs.python.org/issue2211 __ ___ Python-bugs-list mailing list Unsubscribe: http://mail.python.org/mailman/options/python-bugs-list/archive%40mail-archive.com
[issue2212] Cookie.BaseCookie has ambiguous unicode handling
New submission from Jamie Bliss: The primary offender is in BaseCookie.load(), which uses the test: type(rawdata) == type() which should be: isinstance(rawdata, basestring) -- components: Library (Lib) messages: 63145 nosy: astronouth7303 severity: normal status: open title: Cookie.BaseCookie has ambiguous unicode handling type: behavior versions: Python 2.5, Python 2.6 __ Tracker [EMAIL PROTECTED] http://bugs.python.org/issue2212 __ ___ Python-bugs-list mailing list Unsubscribe: http://mail.python.org/mailman/options/python-bugs-list/archive%40mail-archive.com
[issue1728] distutils.cmd breaks inspect
Jamie Bliss added the comment: depending on the use case, updatecache() will be passed 'distutils/cmd.py', but still turn that into '/usr/lib/python2.5/cmd.py'. I have not messed with my stock Python modules. My sys.path is: * /usr/lib/python2.5/site-packages/recaptcha_client-1.0.1-py2.5.egg * /usr/lib/python25.zip * /usr/lib/python2.5/lib-dynload * /usr/lib/python2.5/site-packages/Numeric * /usr/lib/python2.5/site-packages/PIL * /usr/lib/python2.5/site-packages/wx-2.8-gtk2-unicode * /usr/lib/python2.5/site-packages * /usr/lib/python2.5 * /usr/lib/python2.5/plat-linux2 * /usr/lib/python2.5/lib-tk * /usr/local/lib/python2.5/site-packages * /usr/lib/python2.5/site-packages/gst-0.10 * /var/lib/python-support/python2.5/pyinotify * /var/lib/python-support/python2.5 * /usr/lib/python2.5/site-packages/gtk-2.0 * /var/lib/python-support/python2.5/gtk-2.0 * /usr/lib/site-python I've also attached the script I used to discover the bug originally. (Much larger than the snippets I've been pasting here.) Just be warned that it writes a large number of files and produces considerable output. Added file: http://bugs.python.org/file9053/regen __ Tracker [EMAIL PROTECTED] http://bugs.python.org/issue1728 __ ___ Python-bugs-list mailing list Unsubscribe: http://mail.python.org/mailman/options/python-bugs-list/archive%40mail-archive.com
[issue1728] distutils.cmd breaks inspect
Jamie Bliss added the comment: They might be the same bug, with different manifestations. That bug is starting to get rather annoying. (At first, I thought it wasn't. Surprise, surprise.) __ Tracker [EMAIL PROTECTED] http://bugs.python.org/issue1728 __ ___ Python-bugs-list mailing list Unsubscribe: http://mail.python.org/mailman/options/python-bugs-list/archive%40mail-archive.com
Re: I am giving up perl because of assholes on clpm -- switching to Python
In [EMAIL PROTECTED], [EMAIL PROTECTED] mentions: Python is a better language, with php support, anyway, but I am fed up with attitudes of comp.lang.perl.misc. Assholes in this newsgroup ruin Perl experience for everyone. Instead of being helpful, snide remarks, back-biting, scare tactings, and so on proliferate and self reinforce. All honest people have left this sad newsgroup. Buy bye, assholes, I am not going to miss you!!! Martha I've heard people tell the same story, that perl folks are... rude. Actually, I've pretty much heard (and noticed) that about linux, too. Yet, linux is still a good operating environment, so is perl. You'll find rude people everywhere you look. While it may be true that there is a higher percentage of hard-core tech folks who might lack social skills, at least they don't err.. well, maybe they do.. byte. :-) Seriously, it is one of the problems facing perl (and linux) people ARE turned away by the attitude. It is rather embarassing/unflattering when someone is critical of your work. I see a lot of ideas about things should be made easier but I think thats the wrong course. We really just need to be nicer to new folks. Jamie -- http://www.geniegate.comCustom web programming Perl * Java * UNIXUser Management Solutions -- http://mail.python.org/mailman/listinfo/python-list
PIL problems
I am trying to allow JPEG's to be used for portraits inside of Plone. I have Googled and found I need to install the Pytphon Imaging Library (PIL); after that all should be good. I did that, but I an error that tells me there is a missing library. The below is a log of what I did. From what I can tell Python sees the library but .. (I'm used to Perl so I have no idea). I am working on a RHEL v4 x64 system. Thank you in advance for your time. Error Value decoder jpeg not availableHere is the log of me installing PIL: $ sudo /opt/python/bin/python setup.py install running install running build running build_py running build_ext PIL 1.1.6 BUILD SUMMARY version 1.1.6 platform linux2 2.4.3 (#1, Jan 30 2007, 15:38:40) [GCC 3.4.6 20060404 (Red Hat 3.4.6-3)] *** TKINTER support not available --- JPEG support ok --- ZLIB (PNG/ZIP) support ok *** FREETYPE2 support not available *** Warning: zlib 1.2.1.2 may contain a security vulnerability. *** Consider upgrading to zlib 1.2.3 or newer. *** See: http://www.kb.cert.org/vuls/id/238678 http://www.kb.cert.org/vuls/id/680620 http://www.gzip.org/zlib/advisory-2002-03-11.txt To add a missing option, make sure you have the required library, and set the corresponding ROOT variable in the setup.py script. To check the build, run the selftest.py script. running build_scripts running install_lib running install_scripts changing mode of /opt/python/bin/pilprint.py to 755 changing mode of /opt/python/bin/pilconvert.py to 755 changing mode of /opt/python/bin/pilfont.py to 755 changing mode of /opt/python/bin/pildriver.py to 755 changing mode of /opt/python/bin/pilfile.py to 755 creating /opt/python/lib/python2.4/site-packages/PIL.pth $ $ sudo /opt/python/bin/python selftest.py * Failure in example: _info(Image.open(Images/lena.jpg)) from line #24 of selftest.testimage Exception raised: Traceback (most recent call last): File ./doctest.py, line 499, in _run_examples_inner exec compile(source, string, single) in globs File string, line 1, in ? File ./selftest.py, line 22, in _info im.load() File PIL/ImageFile.py, line 180, in load d = Image._getdecoder( self.mode, d, a, self.decoderconfig) File PIL/Image.py, line 375, in _getdecoder raise IOError(decoder %s not available % decoder_name) IOError: decoder jpeg not available 1 items had failures: 1 of 57 in selftest.testimage ***Test Failed*** 1 failures. *** 1 tests of 57 failed. $ $ /opt/python/bin/python -vv -c import PIL._imaging 21 | less # PIL/__init__.pyc matches PIL/__init__.py import PIL # precompiled from PIL/__init__.pyc # trying PIL/_imaging.so dlopen(PIL/_imaging.so, 2); import PIL._imaging # dynamically loaded from PIL/_imaging.so # clear __builtin__._ # clear sys.path -- Jamie Bohr -- http://mail.python.org/mailman/listinfo/python-list
How would I create an class with a Person.Address.City property?
I'm very new to the world of Python and am trying to wrap my head around
it's OOP model. Much of my OOP experience comes from VB.Net, which is
very different.
Let's say I wanted to create an object that simply outputted something
like this:
import employees
person = employee(joe) # Get Joe's employment file
print employee.Title # What does Joe do?
Developer
print person.Address.City # Which city does Joe live in?
Detroit
print person.Address.State # Which state?
Michigan
To do this would I create nested Address class within the employee
class? Would it make more sense to just use print
person.Address('City') instead?
Thanks for your help!
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Re: Pythot doc problem: lambda keyword...
Pisin Bootvong [EMAIL PROTECTED] wrote: Xah Lee ?: [...] Fuck the Python liers and ignorant fuckheads. Motherfucking don't know shit and yet lying thru their teeth with fanfare. [...] Xah [EMAIL PROTECTED] ? http://xahlee.org/ [elided] PB BTW, you post to the wrong group. No, I think c.l.l is exactly the place to discuss how to play many trumpets through one set of teeth. In fact, I have a box of trumpets lying around somewhere... Open wide, Xah! Jamie -- http://mail.python.org/mailman/listinfo/python-list
Injecting a C side object into the local dict
Hello, How do you go about taking a variable which was declared in C and pass that through to a Python script? I have tried doing this by adding a simple string which is a PyObject from C into the local dictionary and retrieving it from script via a locals()[myCvar] print statement. This however does not seem to work. It would seem that when the scripts are ran the local dictionary with the added item is wiped clean and a new local dictionary is instead used. Any direction or help would be appreciated. Cheers, Jamie. -- http://mail.python.org/mailman/listinfo/python-list
Re: socket.makefile AF_UNIX
If you're trying to create a Unix socket then mknod() isn't what you need. You probably want to create a socket and bind() it to the log file: filename = 'snort_alert' s = socket(AF_UNIX, SOCK_DGRAM) s.bind(filename) Interesting - I tried this with a local test_log and it worked, creating: srwxr-xr-x 1 field users 0 Dec 10 19:26 test_log= which looks like my /dev/log device. The call to bind() will probably fail if the socket file already exists, Indeed it does. If it's binary then you might need to use s.recv(). Makes sense. Thanks Michael. I'd expect socket.makefile is probably less encountered than most aspects of socket (according to google, it sure seemed so!). Jamie -- http://mail.python.org/mailman/listinfo/python-list
socket.makefile AF_UNIX
I think I'm overlooking something assumed in socket's makefile method.
Googling several hours and digging thru the python reference didn't help - I
think I'm overlooking an assumption between Python and UNIX socket objects
neither is explicitely discussing. I think my mknod
In the makefile operation on socket (pydoc socket.socket.makefile... using
AF_UNIX, allowing you to create a file object to correspond to a socket) I've
got an sample program (goal: open up unix file socket object for snort's
alert_unixsock output mode to dump to. later, take data written into file
object and process) as follows:
###3
#!/usr/bin/python
## socketfile.py
## for socket file object to collect snort data via alert_unixsock output
makes file interface to socket. demo application takes data written to file
and prints it.
from socket import *
import os
FILE = 'snort_alert'
#FILE = '/dev/log'
if not os.path.exists(FILE):
print Creating file...
os.mknod(FILE)
s = socket(AF_UNIX, SOCK_DGRAM)
# SOCK_DGRAM for UDP compatibility with /dev/log - errors
# on SOCK_STREAM reference for /dev/log
s.connect(FILE)
f = s.makefile('rw')
while 1:
print Data: %s % f.readline(1024)
f.flush()
###3
If I guess correctly, socket.makefile might be wanting to use a block or
character file, which I may not be setting up properly. pydoc on os.mknod
refers to os.makedev which is even sparser on explanation. Part of the reason
for my guess is that:
- permissions on my snort_alert file don't look right:
-rw--- 1 sysadmin users 0 Dec 10 02:58 snort_alert
compared to:
srw-rw-rw- 1 root root 0 Dec 10 01:14 /dev/log=
And when I use /dev/log instead (which exists), it connects to the file object
and runs (though snort does not want to dump to /dev/log and the limitations
of the alert_unixsock output method limit it to /var/log/snort/snort_alert
only). Any thoughts from the socket savvy would be *greatly* appreciated!
Jamie
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