Gabriel Genellina wrote:
If you want a "frozen" function (that is, a function already set-up with
the parameters taken from the current values of x.a, x.b) use
functools.partial:
OK, that's also a nice idea.
Thanks!
Alan
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Terry Reedy wrote:
You are now describing a function closure. Here is an example that
might help.
It does.
Thanks,
Alan
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the
time it is manufactured). I do not care if this
function is attached to `x` or not.
I have a feeling that I am turning something simple
into something complex, perhaps for lack of an
afternoon coffee or lack of CS training. Suggestions
appreciated.
Alan Isaac
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Attributes are data attributes or callable attributes.
Data attributes are variables or properties.
Callable attributes are usually method attributes.
This seemed about right to me, but a better
(or "official") taxonomy would be welcome.
Thanks,
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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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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other 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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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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One other possibility:
SimpleParse (for speed).
http://simpleparse.sourceforge.net/>
It is very nice.
Alan Isaac
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e indexing 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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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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characters'
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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om
http://docs.python.org/ref/metaclasses.html>
but it seems right.
Thank you,
Alan Isaac
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illed".
Cheers,
Alan Isaac
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rtreceived`` values.
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
http://www.dofactory.com/Patterns/PatternObserver.aspx#_self1>
The real world aspects are just to add some concrete
mance grep analog.
https://svn.enthought.com/svn/sandbox/grin/trunk/
hth,
Alan Isaac
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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 U
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.
s, which are only for
illustration.
Thank you,
Alan Isaac
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m/ASPN/Cookbook/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
aeneng wrote:
> WHAT IS WRONG WITH MY CODE?
> def cross(u,v)
Missing colon.
hth,
Alan Isaac
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value):
self._value = value
Cheers,
Alan Isaac
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case that is really uncomfortable?
Thanks,
Alan Isaac
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1 for
> negative) and i is a string 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
not as bad as I feared. What are some use
cases that will clearly be harder (i.e., at least require
a slightly elaborate wrapper) after this change?
Cheers,
Alan Isaac
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27;m overlooking something obvious ...
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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gestion to use ``key``:
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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/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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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
Nathan Pinno wrote:
> Is it possible to return a variable and then use it
I think you are asking about the ``global`` statement.
http://docs.python.org/ref/global.html>
> like the following:
Presumably not. ;-)
Cheers,
Alan Isaac
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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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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 ha
alent generator expressions:
someNewList = list( elementDerivedFrom(smthg)
for smthg in someSequence
if condition(smthg) )
Tastes vary of course.
Cheers,
Alan Isaac
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when I last 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
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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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 alarm
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
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() fo
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
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 T
http://bugs.python.org/issue1121416>
fwiw,
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
,
Alan Isaac
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Gabriel Genellina wrote:
> Perhaps you reassigned TypeError?
Yes, that was it.
Sheesh.
Thanks!
Alan
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False alarm.
Fresh start of interpreter and all is well.
Apologies.
Still tracking.
Alan
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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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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 "", line 1, in
TypeError: u
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=
is also unpickles just fine on my machine,
but in addition the urllib download of this
file unpickles just fine.
Alan Isaac
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ects for an exercise,
and I need not to worry about their directory structure.)
Can you explain the differences I see?
Thank you,
Alan Isaac
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Marc 'BlackJack' Rintsch wrote:
> Pickles are *binary* files, not text files
Actually not:
http://docs.python.org/lib/node316.html
These were created with protocol 0.
But my question is about the different outcomes
I observed.
Thank you,
Alan Isaac
--
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change the filetype to unix. I upload again.
I try to unpickle from the URL. Now it works. Try it:
x1, x2 =
pickle.load(urllib.urlopen('http://www.american.edu/econ/notes/hw/example2'))
Why the difference?
Thank you,
Alan Isaac
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OpenOpt and GenericOpt
==
Introducing two new optimization packages.
OpenOpt and GenericOpt are 100% Python
with a single dependency: NumPy.
For more detail see below and also
https://projects.scipy.org/scipy/scikits/wiki/Optimization>
OpenOpt
---
OpenOpt is new open sour
t pass a "self"
> parameter to them.
http://www.kylev.com/2004/10/13/fun-with-python-properties/
fwiw,
Alan Isaac
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Well, my needs were very limited so the
result is too, but in case someone else
just needs to get started:
http://econpy.googlecode.com/svn/trunk/utilities/mso.py
Comments, suggestions, additions welcom.
Alan Isaac
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>>How about chart creation (in Ppt 2003)?
>>I do not see how to do this with Python.
[EMAIL PROTECTED] wrote:
> You probably need to browse the COM object using PythonWin, which is a
> part of the ActiveState distro. You can also use Python's builtin
> function, dir, to find out various methods of
[EMAIL PROTECTED] wrote:
>
OK, creating bulleted lists, or tables,
or adding pictures is all straightforward.
How about chart creation (in Ppt 2003)?
I do not see how to do this with Python.
Thanks,
Alan
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[EMAIL PROTECTED] wrote:
> Hope that helps!
Yes indeed.
Thanks!
Alan
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Can someone point me to a simple example
or better yet tutorial for creating
a Powerpoint using Python.
Thanks,
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,
Ala
> 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
b
arithmetic.
I mentioned Python 3000 since that is an opportunity for an ideal world.
Cheers,
Alan Isaac
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ce of certain arguments,
not proposing an implementation.
Cheers,
Alan Isaac
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Bjoern Schliessmann wrote:
> Is there any type named "bool" in standard Python?
>>> type(True)
Cheers,
Alan Isaac
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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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s the script
> 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.
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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> 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
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 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 describe
assuming 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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lly 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
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once told me.
Then your math teacher misspoke.
You have two different cars in the set,
just as expected. Use `is`.
http://docs.python.org/ref/comparisons.html
This is good behavior.
Cheers,
Alan Isaac
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My thanks to Gabriel and Josiah.
Alan
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uestion in an unhelpful way. If my question is still unclear, I
would appreciate any leads on how to clarify it.
Thank you,
Alan Isaac
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test.py rely on the user having done this?
Thank you,
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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ser to take the step 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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nstructs that Python can use 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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s surprised as I was. As I said, I am not attached to any
language, 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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I submitted the language based on Bill and Carsten's proposals:
https://sourceforge.net/tracker/?func=detail&atid=105470&aid=1721372&group_id=5470
That language has been rejected.
You many want to read the discussion and see if
acceptible language still seems discoverable.
Alan
the scope of the
containing program.
Alan Isaac
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python.org/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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d 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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>> 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
set.html: append a new sentence to 2nd
paragraph
Iteration 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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trary
> order." If this wording is not present for sets, something to this
> effect should be added.
Even Robert did not claim that *that* phrase was adequate.
I note that you cut off "which is non-random"!
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 objec
an ordinary users.
Did this thread not demonstrate that even sophisticated users
do not see into this "implication" immediately? Replicability
of results is a huge deal in some circles. I think the docs
for sets and dicts should include a red flag: do not use
these as iterators if you w
"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 y
outcome (result2)
- the two outcomes are different (result1 != 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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files.
Explanation welcome!!
Cheers,
Alan Isaac
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ully-pure module as a
> script")
I'm not going to call this a bad practice, since it has clear virtues.
I will say that it does not seem to be a common practice, although that
may be my lack of exposure to other's code. And it still 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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The files are not appropriate for posting.
I do not yet have 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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unlikely.
Alan Isaac
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he shell.
I get 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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t; """
To change my question somewhat, can you give me an example
where this behavior (when __name__ is '__main__') would
be useful for a script? (I.e., more useful than importing relative
to the directory holding the script, as indicated by __file__.)
Thanks,
Alan Isaac
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