Python-pickle error

Hello, I am experincing problems with the pickle moducle the folowing code was working before, import pickle number=2 my_pickeld_object=pickle.dumps(number) print("this is my pickled object",{my_pickeld_object},) with open('file.pkl', 'rb') as file: number=pickle.load(file) my_unpickeled_objec

Re: new sorting algorithm

On 5/1/2022 7:45 PM, Chris Angelico wrote: On Mon, 2 May 2022 at 09:20, Dan Stromberg wrote: On Sun, May 1, 2022 at 1:44 PM Chris Angelico wrote: On Mon, 2 May 2022 at 06:43, Dan Stromberg wrote: On Sun, May 1, 2022 at 11:10 AM Chris Angelico wrote: On Mon, 2 May 2022 at 01:53, Nas Ba

Re: on writing a while loop for rolling two dice

On 9/7/2021 9:20 PM, Avi Gross wrote: Greg, Yes, a smart person may come up with such tricks but a really smart person, in my view, adjusts. With some exceptions, such as when trying to port existing code to a new language quickly, someone who is not too obsessive will try to pick up the goals a

Re: Importing modules with arguments

First off, thanks for the answer. I don't see the cached module as a problem here. If you provide arguments to a module, the goal is "most likely" to alter/parameterize the behavior of the first import. Now, I agree that behavior becomes unpredictable because passing different parameters on subs

Importing modules with arguments

I have found myself wanting to import module and provide arguments to them. There's two main reason I could think of for this. First is to prevent a circular import, though most of circular imports can be prevented by changing the design. The second reason is to invert dependencies between two m

Unable to set up Python correctly

I have a problem going to one(1) week now. Our instructor told us that we can check if our Python is well installed or well set up correctly by typing Control-Shift- P on Windows OS while in VS Code Editor. We cut out the path enclosed within the Quotation Marks, then we type "Select Interpreter" a

Installation Error

Hi, I have been learning and using Python to create a program to play Mah Jongg and it was going well until my windows 10 computer started receiving an update. My computer restarted and Python was gone. I have attempted to reinstall with a message that the install was successful. When I started to

Re: Why exception from os.path.exists()?

On 06/07/2018 12:45 AM, Chris Angelico wrote: On Thu, Jun 7, 2018 at 1:55 PM, Steven D'Aprano wrote: On Tue, 05 Jun 2018 23:27:16 +1000, Chris Angelico wrote: And an ASCIIZ string cannot contain a byte value of zero. The parallel is exact. Why should we, as Python programmers, care one whit

Fwd: Fwd: ftplib sending data out of order

considerably faster than they did with storline. So we've continued to use our new function. On Mon, Jul 10, 2017 at 7:23 AM, Charles Wilt wrote: > I downloaded the 3.6.1 source and added some debug logging to > sock_sendall() and sock_send_impl() in socketmodule.c. > > As I un

possible bug in while loop test

python3 --version Python 3.5.3 Running on Debian stretch In this code s is a string parameter while (j < k and \ (s[j].isalnum()) or \ (s[j] in seps and s[j+1].isalnum()) ): j = j + 1 print ("i = {0}, j = {1}, k = {2}, len[s] = {3}". \ format(i,

Fwd: ftplib sending data out of order

still seeing data being sent out of order. Honestly, I suspect some sort of Windows issue; as Windows is the only thing that's changed recently. But I'm running Win10 and another developer that's seeing it is running Win8. I'd appreciate any guidance you may have. Thank you, Charles Wilt -- https://mail.python.org/mailman/listinfo/python-list

Re: help with an error msg please

On Sun, 14 May 2017 15:30:52 +0200, Pavol Lisy wrote: > On 5/14/17, Charles T. Smith wrote: >> I'm stumped by this: ... > Did you create getopt.py in your working directory? If so then try to > rename it. > > PL. That was it! Not in my working directory, but in th

help with an error msg please

I'm stumped by this: $ PYTHONPATH= python except Traceback (most recent call last): File "except", line 7, in except getopt.error, msg: AttributeError: 'module' object has no attribute 'error' The program is: $ cat except #!/usr/bin/env python import getopt try: opts, args = get

PyDictObject to NSDictionary

Hello, I'm embedding python in to my Objective-C app and I need to know how do I convert a PyDictObject (PyObject) to a NSDictionary? Thanks! -- https://mail.python.org/mailman/listinfo/python-list

Embedding python, run a function and get it's result

Hello, I'm messing around with the embedded python and I can get parts to work. What I'm having a hard time is getting my head around calling a function in the python string and getting it's result. Question, how do I load the python script and call runMe() and get it's value? Thanks! Example

MySQL schema sync or diff

Hello, I have a MySQL database that is not managed (yet) and I would like to get an output or diff against my new model file. I'm using flask-sqlalchemy. Are there any modules that would help me discover the differences so that I can script a migration to begin using flask-migrate? Thanks! --

MySQL schema sync or diff

Hello, I have a MySQL database that is not managed (yet) and I would like to get an output or diff against my new model file. I'm using flask-sqlalchemy. Are there any modules that would help me discover the differences so that I can script a migration to begin using flask-migrate? Thanks! --

Re: Multiprocessing queues receiving from wrong process

On 12/23/2016 01:56 PM, Charles Hixson wrote: I was looking to avoid using a upd connection to transfer messages between processes, so I thought I'd use multiprocessing (which I expect would be faster), but...I sure would appreciate an explanation of this problem. When I run the

Multiprocessing queues receiving from wrong process

I was looking to avoid using a upd connection to transfer messages between processes, so I thought I'd use multiprocessing (which I expect would be faster), but...I sure would appreciate an explanation of this problem. When I run the code (below) instead of messages receiving messages from th

Multiprocessing interactive processes with connections

I want to process a bunch of processes that all talk to each other. I've figured out how to do this using queues with the main process as the mail handler, but I'd rather have them talk directly. If I use connections, then I can pass the pipes to the processes, but there doesn't seem to be anythin

Multiprocessing interactive processes with connections

I want to process a bunch of processes that all talk to each other. I've figured out how to do this using queues with the main process as the mail handler, but I'd rather have them talk directly. If I use connections, then I can pass the pipes to the processes, but there doesn't seem to be an

How to get Read the Docs to generate py-modindex.html?

Since I appear to be experiencing one of the few times that Stack Overflow hasn’t provided any quick answers to a problem (http://stackoverflow.com/questions/39197037/how-to-get-read-the-docs-to-generate-py-modindex-html

Meta Python Chapter 3 Available

I’ve completed a first draft of Chapter 3: Modules (and Packages) of the Meta Python book. Feedback from novices and experts alike would be welcome. https://github.com/chivalry/meta-python Thanks, Chuck -- https://mail.python.org/mailman/listinfo/pytho

Re: Call for Assistance

Well, I’ve been convinced. The license for the book is now Creative Commons Attribution-ShareAlike. https://github.com/chivalry/meta-python/blob/master/LICENSE.md Thanks, Chuck > On Aug 9, 2016, at 3:00 PM, Charles Ross wrote: > >> CC-BY-NC-SA is not a license for free (as in spe

Re: Call for Assistance

> CC-BY-NC-SA is not a license for free (as in speech) content. Is that > what you want? I really appreciate all the conversation about the license. Perhaps I made a mistake with requiring noncommercial in the license, I don’t know, but I’ll look at the links provided about free documentation an

Re: Call for Assistance

gt; On Tuesday 09 August 2016 11:52, Charles Ross wrote: > >> I’ve begun a new book called Meta Python that I’m looking for assistance >> with. > > Are you looking for people to be co-authors? Are you offering payment, or > credit? A free copy of the book? A kick to t

Call for Assistance

I’ve begun a new book called Meta Python that I’m looking for assistance with. The book is one I wish was out there, and so am writing. The book is targeted at experienced programmers who are novice Python users and want to move from that point to one where they have published to PyPI. I’m spec

Re: recursive methods require implementing a stack?

On Wed, 06 Apr 2016 20:28:47 +, Rob Gaddi wrote: > Charles T. Smith wrote: > >> I just tried to write a recursive method in python - am I right that local >> variables are only lexically local scoped, so sub-instances have the same >> ones? Is there a way out of that

recursive methods require implementing a stack?

I just tried to write a recursive method in python - am I right that local variables are only lexically local scoped, so sub-instances have the same ones? Is there a way out of that? Do I have to push and pop my own simulated stack frame entry? -- https://mail.python.org/mailman/listinfo/python

Re: sobering observation, python vs. perl

On Thu, 17 Mar 2016 21:18:43 +0530, srinivas devaki wrote: > please upload the log file, Sorry, it's work stuff, can't do that, but just take any big set of files and change the strings appropriately and the numbers should be equivalent. > > and global variables in python are slow, so just ke

Re: sobering observation, python vs. perl

On Thu, 17 Mar 2016 15:29:47 +, Charles T. Smith wrote: And for completeness, and also surprising: time sed -n -e '/ is ready/{s///;h}' -e '/release_req/{g;p}' *.out | sort -u TestCase_F_00_P TestCase_F_00_S TestCase_F_01_S TestCase_F_02_M real0m10.998s u

Re: sobering observation, python vs. perl

On Thu, 17 Mar 2016 19:08:58 +0200, Marko Rauhamaa wrote: > "Charles T. Smith" : > > > Compare Perl (http://www.perlmonks.org/?node_id=98357>): > >my $str = "I have a dream"; >my $find = "have"; >my $replace = "h

Re: sobering observation, python vs. perl

On Thu, 17 Mar 2016 10:52:30 -0500, Tim Chase wrote: >> Not saying this will make a great deal of difference, but these two > items jumped out at me. I'd even be tempted to just use string > manipulations for the isready aspect as well. Something like > (untested) well, I don't want to forgo RE

Re: sobering observation, python vs. perl

On Thu, 17 Mar 2016 18:30:29 +0200, Marko Rauhamaa wrote: > "Charles T. Smith" : > >> I need the second check to also be a RE because it's not >> separate tokens. > > The string "in" check doesn't care about tokens. > > > Marko

Re: sobering observation, python vs. perl

On Thu, 17 Mar 2016 10:26:12 -0700, Ethan Furman wrote: > On 03/17/2016 09:36 AM, Charles T. Smith wrote: > >> Yes, your point was to forgo REs despite that they are useful. >> I could have thought the search would have been better as: >> >> 'release[

Re: sobering observation, python vs. perl

On Thu, 17 Mar 2016 18:07:12 +0200, Marko Rauhamaa wrote: > "Charles T. Smith" : > Ok. The LANG=C setting has a tremendous effect on the performance of > textutils. > > > Marko Good to know, thank you... -- https://mail.python.org/mailman/listinfo/python-list

Re: sobering observation, python vs. perl

On Thu, 17 Mar 2016 17:48:54 +0200, Marko Rauhamaa wrote: > "Charles T. Smith" : > >> On Thu, 17 Mar 2016 15:29:47 +, Charles T. Smith wrote: >> >> And for completeness, and also surprising: >> >> time sed -n -e '/ is ready

Re: sobering observation, python vs. perl

On Thu, 17 Mar 2016 09:21:51 -0700, Ethan Furman wrote: >> well, I don't want to forgo REs in order to have python's numbers be >> better > > The issue is not avoiding REs, but using Python's strengths and idioms. > Write the code in Python's style, get the same results, then compare > t

Re: sobering observation, python vs. perl

On Thu, 17 Mar 2016 17:47:55 +0200, Marko Rauhamaa wrote: > Can't comment on the numbers but the code segments are not quite > analogous. What about this one: > > #!/usr/bin/env python > # vim: tw=0 > import sys > import re > > isready = re.compile("(.*) is ready") > for

Re: sobering observation, python vs. perl

On Thu, 17 Mar 2016 18:34:06 +0200, Marko Rauhamaa wrote: > n-vs-perl-performance Okay, that was interesting. Actually, I saw a study some years ago that concluded that python could be both slower and faster than perl, but that perl had much less deviation than python. I took that and accepted

sobering observation, python vs. perl

I've really learned to love working with python, but it's too soon to pack perl away. I was amazed at how long a simple file search took so I ran some statistics: $ time python find-rel.py ./find-relreq *.out | sort -u TestCase_F_00_P TestCase_F_00_S TestCase_F_01_S TestCa

Re: hasattr() or "x in y"?

On Fri, 11 Mar 2016 22:00:41 +, Grant Edwards wrote: > Since they behave differently, perhaps the question ought to be "which > does what you want to do?" For parsed msgs, I had this: elif hasattr (msg.msgBody, 'request'): It occurred to me that this was less abstruse:

Re: hasattr() or "x in y"?

On Fri, 11 Mar 2016 21:44:27 +, Charles T. Smith wrote: > From the performance point of view, which is better: - hasattr() > - x in y > > TIA > cts I just realized that "in" won't look back through the class hierarchy... that clearly makes them not interc

hasattr() or "x in y"?

>From the performance point of view, which is better: - hasattr() - x in y TIA cts -- https://mail.python.org/mailman/listinfo/python-list

Re: a clarification on the "global" statement sought

On Fri, 11 Mar 2016 08:31:22 +, Mark Lawrence wrote: > Never. Hopefully this > http://www.python-course.eu/python3_global_vs_local_variables.php can > explain it better than I can :) The article is good, I'm glad to have confirmed what I have so empirical stumbled over. ... Irrespective of t

Re: a clarification on the "global" statement sought

On Fri, 11 Mar 2016 19:29:20 +1100, Chris Angelico wrote: > Usefully? Never. > > Simple question - simple answer :) > > ChrisA Right, that was the expected answer as well. I just ran into that in legacy code, checked out the documentation and couldn't really make that out. So I figured I bet

a clarification on the "global" statement sought

When might a "global" statement be used in the outermost level of a module? (whereby, I assume a module is equivalent to a python file, correct?) TIA for any thoughts. cts -- https://mail.python.org/mailman/listinfo/python-list

Re: How a module is being marked as imported?

ted. On Thursday, February 4, 2016 at 11:20:05 AM UTC+1, Jean-Charles Lefebvre wrote: > Hi all, > > The short version: How CPython marks a module as being fully imported, if it > does, so that the same import statement ran from another C thread at the same > time does not co

How a module is being marked as imported?

Hi all, The short version: How CPython marks a module as being fully imported, if it does, so that the same import statement ran from another C thread at the same time does not collide? Or, reversely, does not think the module is not already fully imported? The full version: I'm running CPytho

Re: Refactoring in a large code base

On Fri, 22 Jan 2016 12:19:50 +0200, Marko Rauhamaa wrote: > We need similar code sanity management. Developers are given much too > much power to mess up the source code. That's why "legacy" is considered > a four-letter word among developers. When I started in this business, in the mid-70s, ther

Re: importing: what does "from" do?

On Thu, 21 Jan 2016 16:30:30 +, Charles T. Smith wrote: >> Side observation: 'int' is a bad name for a package, because it will >> shadow the name of the 'int' built-in. > > > Boy oh boy have I experienced that now! :) (it wasn't me! ;)

Re: importing: what does "from" do?

On Thu, 21 Jan 2016 08:59:39 -0700, Ian Kelly wrote: > What happens if you just do 'import utilities'. Can you then call > utilities.hexdump? Can you see anything in the utilities module? Yes, that works! That's what I'm doing as a work around. I was trying to avoid doing that because I figured

Re: importing: what does "from" do?

On Thu, 21 Jan 2016 15:44:43 +, John Gordon wrote: > In that case, the problem is most likely a circular import issue, as you > mentioned. The only way to fix it is to reorganize your modules. > > How did this error come up? Did the code work previously? If so, what > changed? What I nee

Re: importing: what does "from" do?

On Thu, 21 Jan 2016 15:44:43 +, John Gordon wrote: > How did this error come up? Did the code work previously? If so, what > changed? The developers of this legacy code had this as well as other functions duplicated throughout the system, in order to avoid confronting these issues. I'm tr

Re: importing: what does "from" do?

On Thu, 21 Jan 2016 15:31:45 +, John Gordon wrote: > The most likely explanation here is that the 'utilities' module simply > does not contain something named 'hexdump'. > > Have you inspected the 'utilities' module? Does it, in fact, contain > something named 'hexdump'? Yes -- https://ma

Re: importing: what does "from" do?

On Thu, 21 Jan 2016 07:52:17 -0700, Ian Kelly wrote: >> I have no idea what was imported before. I just want to import >> hexdump(). Unfortunately, this does not work: >> >> from utilities import hexdump >> >> ImportError: cannot import name hexdump > > What is utilities? Is it a module on

importing: what does "from" do?

What does "from (module) import (func)" do? Please don't tell me that I shouldn't ask because real programmers know not to have circular dependencies ... I have no idea what was imported before. I just want to import hexdump(). Unfortunately, this does not work: from utilities import hexdump

Re: When is an int not an int? Who can explain this?

On Tue, 19 Jan 2016 03:19:59 +1100, Chris Angelico wrote: > On Tue, Jan 19, 2016 at 3:11 AM, Charles T. Smith > wrote: >> $ python >> Python 2.6.5 (r265:79063, Apr 16 2010, 13:09:56) [GCC 4.4.3] on linux2 >> Type "help", "copyright", "credits&quo

When is an int not an int? Who can explain this?

$ python Python 2.6.5 (r265:79063, Apr 16 2010, 13:09:56) [GCC 4.4.3] on linux2 Type "help", "copyright", "credits" or "license" for more information. >>> type(0) is int True ... (PDB)type(0) is int False (PDB)type(1) is int False (PDB)p 5 + 0 5 (PDB)class c (object): pass (PDB)type (c()) is c T

Re: Powerful perl paradigm I don't find in python

On Fri, 15 Jan 2016 14:20:17 +0100, Wolfgang Maier wrote: > pattern = pattern_str.compile() > try: > matches = pattern.findall(some_str, endpos=some_str.index(tail)) > except ValueError: > # do something if tail is not found > pass Oh! I think that's it! matches = findall (patte

Re: Powerful perl paradigm I don't find in python

On Fri, 15 Jan 2016 11:42:24 +0100, Wolfgang Maier wrote: > On 15.01.2016 10:43, Peter Otten wrote: >> Charles T. Smith wrote: >> >>> while ($str != $tail) { >>> $str ~= s/^(head-pattern)//; >>> use ($1); >>> } >> >

Re: Powerful perl paradigm I don't find in python

On Fri, 15 Jan 2016 11:04:32 +, Charles T. Smith wrote: > capability, somehow, but that was apparently overlooked. For example, > by storing string state in the match object and having a *sub* method without > a string parameter. -- https://mail.python.org/mailman/listinfo/python-list

Powerful perl paradigm I don't find in python

while ($str != $tail) { $str ~= s/^(head-pattern)//; use ($1); } -- https://mail.python.org/mailman/listinfo/python-list

Re: using __getitem()__ correctly

On Thu, 31 Dec 2015 12:12:43 +, Oscar Benjamin wrote: > When you write x.attr the name 'attr' is looked up on the object x. This > calls x.__getattribute__('attr'). In turn this checks the dict > associated with the object x i.e. x.__dict__['attr']. This in turn calls > x.__dict__.__getitem__

Re: using __getitem()__ correctly

On Wed, 30 Dec 2015 17:31:11 -0700, Ian Kelly wrote: >> In any case, I thought that class attributes were, in fact, items of >> __dict__? > > That's correct, but as I said in my previous message, self.attrs and > self.attrs.__dict__ are two different dicts, and you're confusing one > for the othe

Re: using __getitem()__ correctly

On Thu, 31 Dec 2015 11:21:59 +1100, Ben Finney wrote: > Steven D'Aprano writes: > >> On Thu, 31 Dec 2015 10:13 am, Ben Finney wrote: >> >> > You may be familiar with other languages where the distinction >> > between “attribute of an object” is not distinct from “item in a >> > dictionary”. Pyth

Re: using __getitem()__ correctly

On Thu, 31 Dec 2015 10:50:53 +1100, Steven D'Aprano wrote: > I'm not sure what distinction you're referring to, can you explain? Ian Kelly had said: >> How precisely are you trying to store these: as an attribute, or as a >> dict item? If it's supposed to be in the dict, then why is your >> __ge

Re: how to get names of attributes

On Thu, 31 Dec 2015 10:58:17 +1100, Steven D'Aprano wrote: (some very good information) Thank you. -- https://mail.python.org/mailman/listinfo/python-list

Re: using __getitem()__ correctly

On Thu, 31 Dec 2015 10:13:53 +1100, Ben Finney wrote: > "Charles T. Smith" writes: > >> I don't understand this distinction between an "attribute" and a "dict >> item". > > When did you most recently work through the Python tutorial &

Re: using __getitem()__ correctly

On Wed, 30 Dec 2015 22:54:44 +, Charles T. Smith wrote: > But I concede I must be doing something fundamentally wrong because this > assert is triggering: > def __getattr__ (self, name): > print "attrdict:av:__getattr__: entered for ", name > ass

Re: using __getitem()__ correctly

On Wed, 30 Dec 2015 13:40:44 -0700, Ian Kelly wrote: > On Wed, Dec 30, 2015 at 9:58 AM, Charles T. Smith >> The problem is that then triggers the __getitem__() method and I don't >> know how to get to the attributes without triggering __getattr__(). >> >> It&#

Re: using __getitem()__ correctly

On Wed, 30 Dec 2015 08:35:57 -0700, Ian Kelly wrote: > On Dec 30, 2015 7:46 AM, "Charles T. Smith" > wrote: >> As is so often the case, in composing my answer to your question, I >> discovered a number of problems in my class (e.g. I was calling >> __getitem__()

Re: how to get names of attributes

On Wed, 30 Dec 2015 14:10:14 +, Mark Lawrence wrote: > On 30/12/2015 11:51, Charles T. Smith wrote: >> Hi, >> >> Does anyone know *why* the __members__ method was deprecated, to be >> replaced by dir(), which doesn't tell the truth (if only it took an &

Re: using __getitem()__ correctly

On Thu, 31 Dec 2015 00:11:24 +1100, Chris Angelico wrote: > On Wed, Dec 30, 2015 at 11:57 PM, Charles T. Smith > wrote: >> Hello, >> >> I thought __getitem__() was invoked when an object is postfixed with an >> expression in brackets: >> >> - abc[n] &

Re: how to get names of attributes

On Wed, 30 Dec 2015 23:50:03 +1100, Chris Angelico wrote: > On Wed, Dec 30, 2015 at 11:40 PM, Charles T. Smith > wrote: >> Oh! >> >> Although the referenced doc says: >> >> "For compatibility reasons, classes are still old-style by default." >

using __getitem()__ correctly

Hello, I thought __getitem__() was invoked when an object is postfixed with an expression in brackets: - abc[n] and __getattr__() was invoked when an object is postfixed with an dot: - abc.member but my __getitem__ is being invoked at this time, where there's no subscript (going into a s

Re: how to get names of attributes

On Wed, 30 Dec 2015 11:51:19 +, Charles T. Smith wrote: > Hi, > > How can I get *all* the names of an object's attributes? I have legacy > code with mixed new style classes and old style classes and I need to > write methods which deal with both. That's the imm

Re: how to get names of attributes

On Wed, 30 Dec 2015 11:51:19 +, Charles T. Smith wrote: > Hi, > > How can I get *all* the names of an object's attributes? I have legacy > code with mixed new style classes and old style classes and I need to > write methods which deal with both. That's the imm

how to get names of attributes

Hi, How can I get *all* the names of an object's attributes? I have legacy code with mixed new style classes and old style classes and I need to write methods which deal with both. That's the immediate problem, but I'm always running into the need to understand how objects are linked, in par

asyncio, coroutines, etc. and simultaneous execution

If I understand correctly asyncio, coroutines, etc. (and, of course, Threads) are not simultaneously executed, and that if one wants that one must still use multiprocessing. But I'm not sure. The note is still there at the start of threading, so I'm pretty sure about that one. The requiremen

404 Error when using local CGI Server

I am running a local cgi server from python on a windows 7 computer. Whenever I try to serve the output of a cgi file by entering the following into my browser: http://localhost:8080/filename.py , I get a 404 error message that the file was not found. I'm positive that the files I am trying to serv

Re: Sort list of dictionaries

On Monday, March 2, 2015 at 11:23:37 AM UTC-8, Peter Otten wrote: > Charles Heizer wrote: > > > Never mind, the light bulb finally went off. :-\ > > > > sortedlist = sorted(mylist , key=lambda elem: "%s %s" % ( elem['name'], > > (&

Re: Sort list of dictionaries

Never mind, the light bulb finally went off. :-\ sortedlist = sorted(mylist , key=lambda elem: "%s %s" % ( elem['name'], (".".join([i.zfill(5) for i in elem['version'].split(".")])) ), reverse=True) On Monday, March 2, 2015 at 10:40:30 AM UTC

Re: Sort list of dictionaries

quot;40.0.2214.111" is higher than "40.0.2214.91" but in the end result it's not sorting it that way. Thanks, Charlie On Monday, March 2, 2015 at 10:32:40 AM UTC-8, Emile van Sebille wrote: > On 3/2/2015 10:17 AM, Charles Heizer wrote: > > Hello, > > I'm ne

Sort list of dictionaries

Hello, I'm new to python and I'm trying to find the right way to solve this issue I have. I'm trying to sort this list by name and then by version numbers. The problem I'm having is that I can not get the version numbers sorted with the highest at the top or sorted properly. mylist = [{'name'

Re: Group by interval time

Thank you Peter, I was doing wrong at get_key function... Thnak you so much! -- https://mail.python.org/mailman/listinfo/python-list

Group by interval time

Hello there! I`m trying to group by a list of Row() objects in 12days interval and sum(). values. Here is an example of the list [Row(time=datetime.datetime(2013, 1, 1, 0, 0), sum=4676557380615), Row(time=datetime.datetime(2013, 1, 2, 0, 0), sum=6549630855895), Row(time=datetime.datetime(2013,

Re: __next__ and StopIteration

On 02/09/2015 08:46 PM, Chris Angelico wrote: On Tue, Feb 10, 2015 at 3:33 PM, Charles Hixson wrote: The proper version of the "hard way" is: 1) The __iter__ method of the iterable constructs a new iterator instance and returns it. 2) The __iter__ method of the *iterator* simp

Re: __next__ and StopIteration

On 02/09/2015 03:56 PM, Ian Kelly wrote: On Mon, Feb 9, 2015 at 4:30 PM, Steven D'Aprano wrote: The way you write iterators is like this: Method 1 (the hard way): - Give your class an __iter__ method which simply returns self: def __iter__(self): return self - Give your clas

__next__ and StopIteration

I'm trying to write a correct iteration over a doubly indexed container, and what I've got so far is:def __next__ (self): for rowinrange(self._rows): for col in range(self._cols): if self._grid[row][col]: yieldself._grid[row]

Design and Build Software Engineer Opportunity

My name is Charles Weitzer. I do recruiting for machine learning teams worldwide. One of my clients is a startup quantitative hedge fund located in Northern, California. The founders previous worked together at one of the most successful quantitative hedge funds in the world in New York City

Machine Learning Startup Hiring

Hello, My name is Charles Weitzer. I do recruiting with a focus on quantitative sciences. One of my clients is a machine learning startup located in Northern California. The founders include a successful veteran entrepreneur with a PhD in CS from Stanford, while the other founder is on the

Re: Multiprocessing process termination

On 12/31/2014 01:18 PM, MRAB wrote: On 2014-12-31 19:33, Charles Hixson wrote: In order to allow multiple processes to access a database (currently SQLite) I want to run the process in a separate thread. Because it will be accessed from multiple processes I intent to use Queues for shifting

Multiprocessing process termination

In order to allow multiple processes to access a database (currently SQLite) I want to run the process in a separate thread. Because it will be accessed from multiple processes I intent to use Queues for shifting messages back and forth. But none of the individuals processes will know when al

Re: caught in the import web again

On Tue, 18 Nov 2014 00:00:42 -0700, Michael Torrie wrote: > On 11/17/2014 03:45 PM, Steven D'Aprano wrote: > >> Circular dependencies are not just a problem in Python, they are a >> problem throughout most of software design. > > Personally I find that duck typing eliminates a lot of the circula

Re: caught in the import web again

On Mon, 17 Nov 2014 08:08:40 +0100, dieter wrote: > "Charles T. Smith" writes: >> ... >> Are others equally frustrated by this or is there a trick or principle >> that I'm missing. At this point, I guess the way I'll have to proceed >> is to put e

Re: caught in the import web again

On Sun, 16 Nov 2014 08:14:05 +0100, dieter wrote: > "Charles T. Smith" writes: >> Now, I'm getting these errors: >> >> ImportError: cannot import name ... >> >> and >> >> AttributeError: 'module' object has no attrib

caught in the import web again

Now, I'm getting these errors: ImportError: cannot import name ... and AttributeError: 'module' object has no attribute ... (what is 'module'?) Is there a way to resolve this without having to restructure my code every couple of days? I thought using imports of the form: from module i

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