Goal: turn off an audible alarm without
terminating the program. For example,
suppose a console program is running::
while True:
sys.stdout.write('\a')
sys.stdout.flush()
time.sleep(0.5)
I want to add code to allow me to turn off
this
Paul Rubin wrote:
a = Event()
Thread(target=f, args=(a,)).start()
raw_input('hit return when done: ')
a.set()
Simple and elegant.
Thank you.
Alan
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used it,
some tinkering was required. You could work
on adding features.
http://docutils.sourceforge.net/sandbox/rst2wordml/readme.html
If you get good enough a docutils, provide an option
to have the number for the note be superscripted, like
the note reference can be.
fwiw,
Alan Isaac
:
someNewList = list( elementDerivedFrom(smthg)
for smthg in someSequence
if condition(smthg) )
Tastes vary of course.
Cheers,
Alan Isaac
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On April 12th, 2007 at 10:05 PM Alan Isaac wrote:
The avoidance of tuples, so carefully defended in other
terms, is often rooted (I claim) in habits formed from
need for list methods like ``index`` and ``count``.
Indeed, I predict that Python tuples will eventually have
these methods
Paul Boddie wrote:
Here's the tracker item that may have made it happen:
http://bugs.python.org/issue1696444
I think you need to thank Raymond Hettinger for championing the
cause. ;-)
Yes indeed!
Alan Isaac
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Nathan Pinno wrote:
Is it possible to return a variable and then use it
I think you are asking about the ``global`` statement.
URL:http://docs.python.org/ref/global.html
like the following:
Presumably not. ;-)
Cheers,
Alan Isaac
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Cruxic wrote:
people = set( [Person(1, 'Joe'), Person(2, 'Sue')] )
...
p = people.get_equivalent(2) #method doesn't exist as far as I know
print p.name #prints Sue
def get_equivalent(test, container):
for p in container:
if p == test:
return p
hth,
Alan Isaac
/pipermail/python-3000/2008-January/011764.html
Is that going anywhere?
Also, what is the core motivation for removing this functionality?
Alan Isaac
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``:
this is already possible when it is convenient,
but it is not always convenient. (Even aside
from memory considerations.)
By the way, I even saw mention of even removing the
``cmp`` built-in.
Cheers,
Alan Isaac
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...
how is this supposed to work if __cmp__ is no longer
being called? (Which was my understanding.)
Thank you,
Alan Isaac
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Dan Bishop wrote:
def cmp_key(cmp_fn):
class CmpWrapper(object):
def __init__(self, obj):
self.obj = obj
def __cmp__(self, other):
return cmp_fn(self.obj, other.obj)
return CmpWrapper
On Mar 13, 12:38 pm, Alan Isaac wrote:
how
representing the absolute
value of the integer. So
Does this do it? ::
key= lambda x: (-x[1],int(x2))
Here I am depending on the lexicographic sorting of tuples.
Without that there would be real trouble.
Cheers,
Alan Isaac
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uncomfortable?
Thanks,
Alan Isaac
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Cheers,
Alan Isaac
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aeneng wrote:
WHAT IS WRONG WITH MY CODE?
def cross(u,v)
Missing colon.
hth,
Alan Isaac
--
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/Python/Recipe/131499).
Is anything lost by not maintaining this reference (other
than error checking ...)? If I feel the observer needs
access to the subject, what is wrong with just having the
subject pass itself as part of the notification?
Thank you,
Alan Isaac
--
http
,
Alan Isaac
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Alan Isaac [EMAIL PROTECTED] writes:
Is anything lost by not maintaining this reference (other
than error checking ...)? If I feel the observer needs
access to the subject, what is wrong with just having the
subject pass itself as part of the notification?
Ville M. Vainio wrote
Ville M. Vainio wrote:
in case of stocks, you are probably monitoring several
stock objects, so the stock should probably pass itself to
the observer
OK. This is related to my question #2 (in a separate
thread), where I'd also appreciate your comments.
analogous to a typical
analog.
https://svn.enthought.com/svn/sandbox/grin/trunk/
hth,
Alan Isaac
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.
Is this sensible enough? What are standard and better ways?
Thank you,
Alan Isaac
PS I am drawing on the description of the observer pattern at
URL:http://www.dofactory.com/Patterns/PatternObserver.aspx#_self1
The real world aspects are just to add some concreteness.
--
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,
Alan Isaac
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://docs.python.org/ref/metaclasses.html
but it seems right.
Thank you,
Alan Isaac
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'
position.
Why dont the ``find`` or ``index`` methods work for you?
http://docs.python.org/lib/string-methods.html
Cheers,
Alan Isaac
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Anand Patil wrote:
If you're using IPython, you can do svd?? .
http://www.scipy.org/doc/numpy_api_docs/numpy.linalg.linalg.html
hth,
Alan Isaac
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differently.
I am confident that you could get a lot of guidance on the
NumPy list if you were interested in taking this on.
Cheers,
Alan Isaac
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One other possibility:
SimpleParse (for speed).
URL:http://simpleparse.sourceforge.net/
It is very nice.
Alan Isaac
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On Jun 7, 1:20 pm, Hans Nowak
[user() for i in range(n)]
Kalibr wrote:
or does it somehow work? how would I address them if they all have the
name 'u'?
users = list(User() for i in range(n))
for user in users:
user.do_something()
hth,
Alan Isaac
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library?
You could use SimPy.
Also see:
http://gnosis.cx/publish/programming/charming_python_b10.html
http://www.mech.kuleuven.be/lce2006/147.pdf
If you plan to share you efforts, please post updates here.
Alan Isaac
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Daniel Fetchinson wrote:
Is there a way to do similar things on linux?
NJSModule?
http://en.wikipedia.org/wiki/NJS
Alan Isaac
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/listinfo/users
2. Did you try to compile it?
Is there anything obviously 2.5 incompatible?
Cheers,
Alan Isaac
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Not Python, but maybe relevant:
http://www.scriptaworks.com/cgi-bin/wiki.sh/NoSQL/HomePage
Alan Isaac
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on the user having done this?
Thank you,
Alan Isaac
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is still unclear, I
would appreciate any leads on how to clarify it.
Thank you,
Alan Isaac
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My thanks to Gabriel and Josiah.
Alan
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as expected. Use `is`.
http://docs.python.org/ref/comparisons.html
This is good behavior.
Cheers,
Alan Isaac
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** identical,
in the sense of having the same conceptual reference.
In contrast, two equal cars are generally not identical
in this sense. Of course you can make them so if you wish,
but it is odd. So *nothing* is wrong here, imo.
Btw:
a = 12
b = 12
a == b
True
a is b
True
Cheers,
Alan Isaac
there is not one. (?)
How about allowing a `scripts.pth` file in such a `scripts`
directory, to work like a path configuration file?
(But to be used only when __name__==__main__.)
Drawbacks?
Alan Isaac
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On Jul 3, 7:35 am, Alan Isaac [EMAIL PROTECTED] wrote:
Suppose I have a directory `scripts`.
I'd like the scripts to have access to a package
that is not installed, i.e., it is not on sys.path.
On this list, various people have described a variety
of tricks they use, but nobody has proposed
Once upon a time, `coerce` was documented
with the other built-ins.
http://pydoc.org/1.5.2/__builtin__.html
Now it is not.
http://docs.python.org/lib/built-in-funcs.html
Reason?
Thanks,
Alan Isaac
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On 2007-07-05, Alan Isaac [EMAIL PROTECTED] wrote:
Once upon a time, `coerce` was documented
with the other built-ins.
Neil Cerutti wrote:
It's now documented in Library Reference 2.2 Non-essential
Built-in Functions.
Apparently it is no longer needed or useful, but only kept for
backward
Is there any discussion of having real booleans
in Python 3000? Say something along the line
of the numpy implementation for arrays of type 'bool'?
Hoping the bool type will be fixed will be fixed,
Alan Isaac
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that wanted to import it.
Right.
I'm curious whether you think that the OP's use of .pth was a typo,
and whether you have read this:
http://docs.python.org/lib/module-site.html
You seem to understand what I'm getting at.
Thanks John.
Alan Isaac (the OP above)
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Stargaming wrote:
I think Bjoern just wanted to point out that all those binary
boolean operators already work *perfectly*.
bool(False-True)
True
But reread Steven.
Cheers,
Alan Isaac
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Bjoern Schliessmann wrote:
Is there any type named bool in standard Python?
type(True)
type 'bool'
Cheers,
Alan Isaac
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arguments,
not proposing an implementation.
Cheers,
Alan Isaac
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arithmetic.
I mentioned Python 3000 since that is an opportunity for an ideal world.
Cheers,
Alan Isaac
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On Jul 13, 9:54 am, Matimus [EMAIL PROTECTED] wrote:
num = 255
numlist = [num i 1 for i in range(8)]
Godzilla wrote:
Thanks matimus! I will look into it...
Watch out for the order, which might
or might not match your intent.
Cheers,
Alan Isaac
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Alan Isaac skrev:
http://www.python.org/dev/peps/pep-0285/
Nis Jørgensen wrote:
You forgot to quote this bit: [4)]
Actually not. That is a different point.
Ben seems bothered by this, but not me.
I do not mind that True+1 is 2.
I won't do it, but I do not object to it
being possible.
I do
,
Alan Isaac
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I suppose my question should have been,
is there an obviously faster way?
Anyway, of the four ways below, the
first is substantially fastest. Is
there an obvious reason why?
Thanks,
Alan Isaac
PS My understanding is that the behavior
of the last is implementation dependent
and not guaranteed
that it.next() will be performed from left to right,
so there is no risk that e.g. pairs4([1, 2, 3, 4]) returns [(2, 1),
(4, 3)].
Is there anything else that I am overlooking?
[1] http://docs.python.org/lib/itertools-functions.html
URL:http://bugs.python.org/issue1121416
fwiw,
Alan Isaac
Arnaud Delobelle wrote:
pairs4 wins.
Oops. I see a smaller difference,
but yes, pairs4 wins.
Alan Isaac
import time
from itertools import islice, izip
x = range(51)
def pairs1(x):
return izip(islice(x,0,None,2),islice(x,1,None,2))
def pairs2(x):
xiter = iter(x)
while True
John Deas wrote:
My problem is that f.read() outputs nothing
Since ``open`` did not give you an IOError,
you did get a handle to the files,
so this suggests that the files you read
are empty...
Alan Isaac
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[EMAIL PROTECTED] wrote:
I'd use the first solution.
It can be speeded up a bit with
a try/except:
for k,v in kv:
try:
if d[k] v:
d[k] = v
except KeyError:
d[k] = v
Cheers,
Alan Isaac
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Alan Isaac wrote:
#sort by id and then value
kv_sorted = sorted(kv, key=lambda x: (id(x[0]),x[1]))
#groupby: first element in each group is object and its min value
d =dict( g.next() for k,g in groupby( kv_sorted, key=lambda x: x[0] ) )
Yes, that appears to be fastest and is
pretty easy
Steven Bethard wrote:
[3rd approach] Seems pretty enough to me. ;-)
I find it most attractive of the lot.
But its costs would rise if the number
of values per object were large.
Anyway, I basically agree.
Thanks,
Alan
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I have a small set of objects associated with a larger
set of values, and I want to map each object to its
minimum associated value. The solutions below work,
but I would like to see prettier solutions...
Thank you,
Alan Isaac
Paul Rubin wrote:
How about something like:
kv_sorted = sorted(kv, key=lambda x: (id(x[0]), x[1]))
You mean like this?
#sort by id and then value
kv_sorted = sorted(kv, key=lambda x: (id(x[0]),x[1]))
#groupby: first element in each group is object and its min value
d =dict( g.next() for
none wrote:
Is there some package to calculate combinatorical stuff like (n over
k), i.e., n!/(k!(n - k!) ?
Yes, in SciPy.
Alan Isaac
from scipy.misc.common import comb
help(comb)
Help on function comb in module scipy.misc.common:
comb(N, k, exact=0)
Combinations of N things
Is the behavior below expected?
If so, why is the exception not caught?
Thanks,
Alan Isaac
x,y='',''
try: x/y
... except TypeError: print 'oops'
...
Traceback (most recent call last):
File stdin, line 1, in module
TypeError: unsupported operand type(s) for /: 'str' and 'str'
--
http
Tim Chase wrote:
It works for me(tm)...
Python 2.4.3
Sorry to have left out that detail.
Yes, it works for me in Python 2.4,
but not in 2.5.1.
The code I posted was copyied from the interpreter.
Alan Isaac
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False alarm.
Fresh start of interpreter and all is well.
Apologies.
Still tracking.
Alan
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Gabriel Genellina wrote:
Perhaps you reassigned TypeError?
Yes, that was it.
Sheesh.
Thanks!
Alan
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result1.
I execute it again; I get result2.
From then on I get result2,
unless I delete module.pyc again,
in which case I once again get result1.
Can someone explain this to me?
Thank you,
Alan Isaac
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is unlikely.
Alan Isaac
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a minimum case.
But surely I am not the first to notice this!
Alan Isaac
PS I'll send you the files off list.
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does not
address the common need of playing with a package in progress
or a package under consideration without installing it.
Cheers,
Alan Isaac
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!!
Cheers,
Alan Isaac
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!= result2)
Do you see something different than this if you run the
test as I suggested? If not, how can in not involve the
.pyc file (in some sense)?
Cheers,
Alan Isaac
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Peter Otten [EMAIL PROTECTED] wrote in message
news:[EMAIL PROTECTED]
Alan Isaac wrote:
There is nothing wrong with the random module -- you get the same numbers
on
every run. When there is no pyc-file Python uses some RAM to create it and
therefore your GridPlayer instances are located
think the docs
for sets and dicts should include a red flag: do not use
these as iterators if you want replicable results.
(Side note to Carsten: this does not require listing every little thing.)
Cheers,
Alan Isaac
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Robert Kern [EMAIL PROTECTED] wrote in message
news:[EMAIL PROTECTED]
Actually, the root cause of Peter's specific example is the fact that the
default implementation of __hash__() and __eq__() rely on identity
comparisons.
Two separate invocations of the same script give different objects by
did not claim that *that* phrase was adequate.
I note that you cut off which is non-random!
Alan Isaac
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over a set returns elements in an arbitrary order,
which may depend on the memory location of the elements.
fwiw,
Alan Isaac
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Alan Isaac requested:
http://docs.python.org/lib/typesmapping.html: to footnote (3), add phrase
http://docs.python.org/lib/types-set.html: append a new sentence to 2nd
paragraph
Hamilton, William [EMAIL PROTECTED] wrote in message
news:[EMAIL PROTECTED]
Keys and values are listed
.
Iteration over a set returns elements in an indeterminate order,
which
generally depends on factors outside the scope of the containing
program.
Alan Isaac
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/lib/types-set.html: append a new sentence to 2nd par.
Iteration over a set returns elements in an indeterminate
order,which
generally depends on factors outside the scope of the containing
program.
Alan Isaac
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of the
containing program.
Alan Isaac
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I submitted the language based on Bill and Carsten's proposals:
https://sourceforge.net/tracker/?func=detailatid=105470aid=1721372group_id=5470
That language has been rejected.
You many want to read the discussion and see if
acceptible language still seems discoverable.
Alan Isaac
--
http
, and in fact I just used the proposals of others.
I just wanted there to be some clue for users who read the docs.
If you prefer to leave such users baffled, so be it.
My effort is exhausted.
Cheers,
Alan Isaac
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to process these files?
Someone can. ;-)
However if the file is structured,
awk may be faster, since this sounds
like the kind of report generation it
was designed for.
Alan Isaac
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of
inserting the package location into sys.path and have
test.py rely on the user having done this?
What is the recommended handling of demo or test scripts
for a package?
Thank you,
Alan Isaac
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your code, so you get to license it.
But if you wish to solicit patches,
a more Pythonic license is IMHO more likely
to prove fruitful.
Alan Isaac
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)
Cheers,
Alan Isaac
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the value the object get by calling the wrapped
generator.
A reasonable approach?
Thanks,
Alan Isaac
PS Here is a useless class to illustrate the basic idea
that you could have both attribute access and a
generator-connected ``next`` method.
class Start2Stop:
def __init(start,stop
have a fixed order.
A tuple is natural. Now for a player you want to
construct the opponents. If I had the index i it wd
be p[:i]+p[i+1:], but how to get the index?
Cheers,
Alan Isaac
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of a
response is that?? This sounds to me like I do not
really see the point of immutability, which is no
response at all.
Cheers,
Alan Isaac
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we will be allowed to treat sequences that are naturally immutable
as immutable or will be forced for no real reason (I believe the
code maintenance issue has been dealt with) to treat them
differently.
Cheers,
Alan Isaac
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Terry Reedy [EMAIL PROTECTED] wrote in message
news:[EMAIL PROTECTED]
The main point of immutability is hashability by value (rather than by
id).
You are treating an effect as a cause.
This is the main point *because*
of an artifical constraint on tuples.
Cheers,
Alan Isaac
--
http
http://matplotlib.sourceforge.net/screenshots.html
esp
http://matplotlib.sourceforge.net/screenshots/axes_demo.py
hth,
Alan Isaac
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than any object, and the current
behavior does not seem to be guaranteed.
Is that about right?
Cheers,
Alan Isaac
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than any object, and the current
behavior does not seem to be guaranteed.
Is that about right?
Cheers,
Alan Isaac
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Steve Holden [EMAIL PROTECTED] wrote in message
news:[EMAIL PROTECTED]
Steven Howe wrote:
Alan Isaac wrote: [type comparison stuff]
I love scripting languages ... but sometimes an explicit evaluation that
one would find in
a compiled language is better.
Actually all that language
.
Indeed, that was the basis of my original question.
I wondered why no exception was raised.
Thanks,
Alan Isaac
PS Note that the change you mention will conflict with
currently documented behavior:
objects of different types always compare unequal.
So this seems like a large change.
--
http
Running test.py will print False.
Is this expected/desirable?
Thanks,
Alan Isaac
%%% test.py %%%
from random import seed, getstate
seed(217)
x = getstate()
from test2 import Trivial
y = getstate()
print x == y
% test2.py %
from random import seed
seed(314)
class
be able to use seed
to set a global state? (See for contrast
numpy.random, for which my appreciation
has just increased yet again.)
Cheers,
Alan Isaac
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James Stroud [EMAIL PROTECTED] wrote in message
news:[EMAIL PROTECTED]
if __name__ == __main__:
seed(314)
Thanks for this suggestion.
Alan Isaac
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Alex Martelli said:
What do you mean? Just instantiate the random.Random class and you can
call .seed on it as well as anything else, and no other module will
infringe on your module's Random instance. The global functions of
module random exist for those who *SPECIFICALLY* want globally
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