On 1/28/2010 2:24 PM, Joan Miller wrote:
On 28 ene, 19:16, Josh Holland wrote:
On 2010-01-28, Joan Miller wrote:
I've to call to many functions with the format:
run("cmd")
Check the docs on os.system().
No. I've a function that uses subprocess to run commands on the same
shell and so s
On 1/28/2010 3:45 PM, Joan Miller wrote:
On 28 ene, 20:34, Joan Miller wrote:
On 28 ene, 20:20, Peter wrote:
On Jan 29, 6:58 am, John Posner wrote:
On 1/28/2010 2:24 PM, Joan Miller wrote:
On 28 ene, 19:16, Josh Hollandwrote:
On 2010-01-28, Joan Millerwrote:
I've to
On 1/28/2010 6:52 PM, elsa wrote:
Hi guys,
I've got a problem with my program, in that the code just takes too
long to run. Here's what I'm doing. If anyone has any tips, they'd be
much appreciated!
So, say I have a list of lists that looks something like this (I'm
using a list of lists, rather
On 1/30/2010 6:08 PM, elsa wrote:
Hello again,
Thanks for the tips r.e random.ranint(). This improved matters
somewhat, however my program is still too slow. If anyone has any
further tips on how to speed it up, they would be much appreciated!
So, I'm calling evolve(L,limit) from the interactiv
If you can enumerate the language of possible inputs you could
generate a unique binary representation. Against a language of size
l that would only take you O(l*n) to build the repr for a dict
and for certain repr sizes the comparison could be O(1), making
the entire operation O(l*n+l*m) vs O(n
Duncan Booth wrote:
/ class CallableOnlyOnce(object):
/def __init__(self, func):
self.func = func
def __call__(self):
f = self.func
if f:
self.func = None
return f()
/ def callonce(func):
/ return CallableOnlyOnce(func)
/ @callonce
/
Mensenator said:
c = '001110'
c.split('0')
['', '', '1', '', '', '', '11', '']
Ok, the consecutive delimiters appear as empty strings for
reasons unknown (except for the first one). Except when they
start or end the string in which case the first one is included.
Maybe there's a r
Carl Banks wrote:
s.split() and s.split(sep) do different things, and there is no string
sep that can make s.split(sep) behave like s.split(). That's not
unheard of but it does go against our typical expectations. It would
have been a better library design if s.split() and s.split(sep) were
d
Mensanator wrote:
That's interesting. If string.splitfields(delim) was equivalent to
str.split(sep), it would have been useful to add the phrase
"str.split(sep) is equivalent to the old string.splitfields(delim)
which no longer exists." to the docs. That way, a search on
"splitfields" would direc
[resend, with Subject line corrected and formatting crud deleted]
Mensanator wrote:
That's interesting. If string.splitfields(delim) was equivalent to
str.split(sep), it would have been useful to add the phrase
"str.split(sep) is equivalent to the old string.splitfields(delim)
which no longer ex
linda.s wrote:
When I click "quit" button, why the following code has problem?
from Tkinter import *
colors = ['red', 'green', 'yellow', 'orange', 'blue', 'navy']
def gridbox(parent):
r = 0
for c in colors:
l = Label(parent, text=c, relief=RIDGE, width=25)
e = Entry(pa
Ronn Ross wrote:
I'm attempting to add a menu bar to my Tkinter app. I can't figure out the
correct syntax. Can someone help? I get this error when I run the app:
Traceback (most recent call last):
File "tkgrid.py", line 26, in
app = App(root)
File "tkgrid.py", line 10, in __init__
Robert P. J. Day said:
the ubiquitous sieve of eratosthenes requires you to pre-specify
your maximum value, after which -- once the sieve completes -- all you
know is that you have all of the prime numbers up to n. whether
you'll have 1000 of them isn't clear, which means that you might have
t
King wrote:
class MyFloat(object):
def __init__(self, value=0.):
self.value = value
def set(self, value):
self.value = value
def get(self):
return self.value
class MyColor(object):
def __init__(self, value=(0,0,0)):
self.value = (MyFloat(value[0
> I'm on Python 2.5, but using the updated turtle.py Version 1.0.1 -
24. 9. 2009.
> The following script draws 5 circles, which it is supposed to, but then
> doesn't draw the second turtle which is supposed to simply move forward.
> Any ideas?
Try commenting out this statement:
self.turtle.t
On 2/5/2010 9:21 AM, mk wrote:
if isinstance(cmd, str):
self.cmd = cmd.replace(r'${ADDR}',ip)
else:
self.cmd = cmd
or
self.cmd = cmd
if isinstance(cmd, str):
self.cmd = cmd.replace(r'${ADDR}',ip)
(lunatic fringe?)
Last August [1], I offered this alternative:
self.cmd = (cmd
On 2/5/2010 11:06 AM, Gerald Britton wrote:
[snip]
Last August [1], I offered this alternative:
self.cmd = (cmd.replace(r'${ADDR}',ip)
if isinstance(cmd, str) else
cmd)
But it didn't get much love in this forum!
I'd probably go for that one as well though I mig
On 2/5/2010 11:26 AM, Gerald Britton wrote:
sure, but it will fit nicely on one line if you like
On Fri, Feb 5, 2010 at 11:22 AM, John Posner wrote:
On 2/5/2010 11:06 AM, Gerald Britton wrote:
[snip]
Last August [1], I offered this alternative:
self.cmd = (cmd.replace
On 2/5/2010 11:53 AM, Gerald Britton wrote:
Also, I'm contractually obligated to
admonish you not to "top post".
Contract?
Joke. (I know it's hard to tell.)
At any rate, I proposed the 3-line format specifically because it separates
the data values from the if-then-else machinery, mak
On 2/6/2010 6:48 AM, Steven D'Aprano wrote:
class MyStaticMethod(object):
"""Emulate built-in staticmethod descriptor."""
def __init__(self, f):
self.f = f
def __get__(self, obj, objtype=None):
return self.f
How about using a function, instead of a class, to imp
On 2/10/2010 9:36 AM, Steven D'Aprano wrote:
On Wed, 10 Feb 2010 05:59:41 -0800, Muhammad Alkarouri wrote:
Hi everyone,
What is the simplest way to access the attributes of a function from
inside it, other than using its explicit name? In a function like f
below:
def f(*args):
f.args = a
On 2/10/2010 10:24 AM, Bruno Desthuilliers wrote:
They didn't break immediately for me -- what am I missing?:
The fact that in the OP's snippet, code inside f's body refers to f by
its name.
Of course! Tx. -John
--
http://mail.python.org/mailman/listinfo/python-list
On 2/10/2010 2:57 PM, Grant Edwards wrote:
On 2010-02-10, [email protected] wrote:
[regardning "picture" output format specifiers]
I was thinking that there was a built-in function for this
common(?) use case
I haven't seen that paradigm since my one-and-only exposure to
COBOL in a class I
On 2/10/2010 1:38 PM, Ethan Furman wrote:
After all is said and done - if you had a truly good grasp of Python, I
might buy your book even if you still had -- ummm -- a less than winning
presence on the mailing list; but right now your understanding is not
worth paying for.
Alf, here's my sug
On 2/12/2010 12:45 PM, R (Chandra) Chandrasekhar wrote:
Dear Folks,
I have lines of values like so:
14, [25, 105, 104]
10, [107, 106, 162]
21, [26, 116, 165]
I need to sort them in two ways:
(a) By the numeric value of the first column; and
(b) by the sum of the elements of the second item i
On 2/12/2010 12:14 PM, Steven D'Aprano wrote:
On Fri, 12 Feb 2010 06:45:31 -0800, Jeremy wrote:
You also confirmed what I thought was true that all variables are passed
"by reference" so I don't need to worry about the data being copied
(unless I do that explicitly).
No, but yes.
No, variabl
On 2/15/2010 7:35 AM, R (Chandra) Chandrasekhar wrote:
Dear Folks,
I want to execute a command from within python using the subprocess module.
Coming from a Perl background, I thought I could use variable
interpolation in strings, but found that this is neither supported
Yes, it is: see the u
Alf said (2/13/2010 8:34 PM):
Names in Python refer to objects.
Those references can be copied via assignment.
That's (almost) all.
And it provides a very short and neat way to describe pass by sharing.
Alf also said (2/13/2010 8:43 PM):
* Steve Howell:
> This thread is interesting on man
On 2/15/2010 6:09 PM, Steven D'Aprano wrote:
On Mon, 15 Feb 2010 21:25:23 +, Arnaud Delobelle wrote:
John Posner writes: [...]
x = s[0]
[...]
assigns the name *x* to the object that *s[0]* refers to
s[0] does not refer to an object, it *is* an object (once evaluated of
c
On 2/17/2010 1:10 PM, Andrej Mitrovic wrote:
Hi,
I couldn't figure out a better description for the Subject line, but
anyway, I have the following:
_num_frames = 32
_frames = range(0, _num_frames) # This is a list of actual objects,
I'm just pseudocoding here.
_values = [0, 1, 2, 3, 4]
I want
On 2/17/2010 2:44 PM, Bruno Desthuilliers wrote:
Mmmm... Let's try to explain the whole damn thing. It's really (and IMHO
beautifully) simple once you get it, but I agree it's a bit peculiar
when compared to most mainstream OO languages.
Very nice writeup, Bruno -- thanks!
class method(ob
On 2/18/2010 12:28 PM, mk wrote:
Sorry to bother everyone again, but I have this problem bugging me:
#!/usr/bin/python -i
class Foo(object):
def nostat(self,val):
print val
nostat.__orig_get__ = nostat.__get__
@staticmethod
def nostatget(*args, **kwargs):
print 'args:', args, 'kwargs:', kwa
On 2/19/2010 2:25 PM, Terry Reedy wrote:
On 2/19/2010 12:44 PM, Stephen Hansen wrote:
Much to my embarrassment, sometime last night I realized I was being a
complete idiot, and the 'correct' way to handle this in my scenario is
really just:
def initialize():
# do one time processing here
retu
On 2/19/2010 3:02 PM, MRAB wrote:
Is this any better?
def read_data_file(filename):
reader = csv.reader(open(filename, "U"),delimiter='\t')
data = []
for row in reader:
if '[MASKS]' in row:
break
data.append(row)
As noted in another thread recently, you
On 2/22/2010 4:29 PM, Bryan wrote:
Sorry about the sorted != ordered mix up. I want to end up with a
*sorted* dict from an unordered list. *Sorting the list is not
practical in this case.* I am using python 2.5, with an ActiveState
recipe for an OrderedDict.
Have you looked at this:
htt
On 2/23/2010 1:25 PM, Michael Rudolf wrote:
Just a quick question about what would be the most pythonic approach in
this.
In Java, Method Overloading is my best friend, but this won't work in
Python:
>>> def a():
pass
>>> def a(x):
pass
>>> a()
Traceback (most recent call last):
File "", lin
On 2/24/2010 9:07 AM, Steve Holden wrote:
John Posner wrote:
Note that the Py2.6.4 documentation is inconsistent. AFAICT, it conforms
to Terry's definitions above in most places. But the Glossary says:
generator
A function which returns an iterator.<... more ...>
generator
An iterator produced by a generator function or a generator
expression.
-John
+1. Can someone submit a documentation patch, please?
Will do. -John
[sorry if this is a dup]
Done: #8012 "Revise generator-related Glossary entries"
-John
--
http://mail.python.org/mailman/listinfo/
On 2/24/2010 12:39 PM, Abigail wrote:
Yesterday I downloaded and installed Python 3.1 and working through some
examples but I have hit a problem
a = raw_input("Enter a number" )
Traceback (most recent call last):
File "", line 1, in
a = raw_input("Enter a number" )
NameError: name 'raw
On 2/24/2010 4:54 PM, Jonathan Gardner wrote:
On Wed, Feb 24, 2010 at 12:23 PM, Andreas Waldenburger
wrote:
Hi all,
a company that works with my company writes a lot of of their code in
Python (lucky jerks). I've seen their code and it basically looks like
this:
"""Function that does stuff""
On 2/26/2010 4:21 PM, qtrimble wrote:
fileIN = open(r"C:\testing.txt", "r")
for line in fileIN:
year = line[3:7]
day = line[7:10]
print year, day
This is good since i can get the year and day of year into a variable
but I haven't gotten any further.
That's an excellent start.
On 2/26/2010 6:32 PM, Raphael Mayoraz wrote:
Hello,
I'd like to define variables with some specific name that has a common
prefix.
Something like this:
varDic = {'red': 'a', 'green': 'b', 'blue': 'c'}
for key, value in varDic.iteritems():
'myPrefix' + key = value
No trick, just swap a new ke
On 2/26/2010 10:20 PM, Steven D'Aprano wrote:
On Fri, 26 Feb 2010 20:15:16 -0500, John Posner wrote:
On 2/26/2010 6:32 PM, Raphael Mayoraz wrote:
Hello,
I'd like to define variables with some specific name that has a common
prefix.
Something like this:
varDic = {'red
On 3/1/2010 1:07 PM, Raphael Mayoraz wrote:
John Posner wrote:
On 2/26/2010 6:32 PM, Raphael Mayoraz wrote:
Hello,
I'd like to define variables with some specific name that has a common
prefix.
Something like this:
varDic = {'red': 'a', 'green':
On 3/1/2010 2:59 PM, Bruno Desthuilliers wrote:
Answer here:
http://groups.google.com/group/comp.lang.python/tree/browse_frm/thread/bd71264b6022765c/3a77541bf9d6617d#doc_89d608d0854dada0
I really have to put this in the wiki :-/
Bruno, I performed a light copy-edit of your writeup and put i
thod object: in the call method, it should inject self.im_self as
first arg, not self.im_func. This had been spotted by someone named John
Posner, IIRC !-)
Fixed (oops!).
I've updated the text at this location:
> http://cl1p.net/bruno_0301.rst/
I think the ball is back in your court,
On 3/2/2010 10:19 AM, Roy Smith wrote:
Somewhat sadly, in my case, I can't even machine process the header
file. I don't, strictly speaking, have a header file. What I have is
a PDF which documents what's in the header file, and I'm manually re-
typing the data out of that. Sigh.
Here's an
On 3/3/2010 5:56 AM, Bruno Desthuilliers wrote:
Eike Welk a écrit :
John Posner wrote:
I've updated the text at this location:
> http://cl1p.net/bruno_0301.rst/
I think this is a very useful writeup!
It would be perfect with a little bit of introduction that says:
1. - What it
On 3/3/2010 9:58 AM, John Posner wrote:
Film at 11,
John
Done -- see http://wiki.python.org/moin/FromFunctionToMethod
-John
--
http://mail.python.org/mailman/listinfo/python-list
On 3/3/2010 10:48 AM, Bruno Desthuilliers wrote:
I spotted this:
http://www.python.org/doc/faq/programming/#what-is-a-method
http://www.python.org/doc/faq/general/#why-must-self-be-used-explicitly-in-method-definitions-and-calls
Our text is probably a bit too long for a direct inclusion in t
On 3/3/2010 6:33 PM, Eike Welk wrote:
I have two small ideas for improvement:
- Swap the first two paragraphs. First say what it is, and then give the
motivation.
No problem -- since this is a Wiki, you can perform the swap yourself!
(If you haven't done it in a day or so, I'll do the deed.)
On 3/4/2010 5:59 AM, Bruno Desthuilliers wrote:
I have two small ideas for improvement: - Swap the first two
paragraphs. First say what it is, and then give the motivation.
Mmm... As far as I'm concerned, I like it the way its. John ?
I think it doesn't make very much difference. But in the
On 3/3/2010 6:56 PM, John Posner wrote:
... I was thinking
today about "doing a Bruno", and producing similar pieces on:
* properties created with the @property decorator
* the descriptor protocol
I'll try to produce something over the next couple of days.
Starting t
On 3/5/2010 7:15 AM, Bruno Desthuilliers wrote:
John Posner a écrit :
On 3/3/2010 6:56 PM, John Posner wrote:
... I was thinking
today about "doing a Bruno", and producing similar pieces on:
* properties created with the @property decorator
* the descriptor protocol
I'll
On 3/7/2010 10:05 AM, vsoler wrote:
Hello,
My script starts like this:
book=readFromExcelRange('book')
house=readFromExcelRange('house')
table=readFromExcelRange('table')
read=readFromExcelRange('read')
...
But I would like to have something equivalent, like...
ranges=['book','house','table',
On 3/7/2010 10:59 AM, vsoler wrote:
Thank you for your help. Perhaps the solution you are suggesting is
not exactly what I was looking for, but helped anyway.
Oops, I was thinking list, not dict. Too fast, and not enough coffee!
-John
--
http://mail.python.org/mailman/listinfo/python-list
On 3/8/2010 5:34 PM, dimitri pater - serpia wrote:
Hi,
I have two related lists:
x = [1 ,2, 8, 5, 0, 7]
y = ['a', 'a', 'b', 'c', 'c', 'c' ]
what I need is a list representing the mean value of 'a', 'b' and 'c'
while maintaining the number of items (len):
w = [1.5, 1.5, 8, 4, 4, 4]
I have looke
On 3/8/2010 9:39 PM, John Posner wrote:
# gather data
tally_dict = defaultdict(Tally)
for i in range(len(x)):
obj = tally_dict[y[i]]
obj.id = y[i] <--- statement redundant, remove it
obj.total += x[i]
obj.count += 1
-John
--
http://mail.python.org/mailman/listinfo/pyt
On 3/8/2010 9:43 PM, John Posner wrote:
On 3/8/2010 9:39 PM, John Posner wrote:
obj.id = y[i] <--- statement redundant, remove it
Sorry for the thrashing! It's more correct to say that the Tally class
doesn't require an "id" attribute at all. So the code bec
On 3/8/2010 11:55 PM, Gary Herron wrote:
The form of import you are using
from helpers import mostRecent
makes a *new* binding to the value in the module that's doing the
import.
What you can do, is not make a separate binding, but reach into the
helpers module to get the value there. Like
On 3/9/2010 9:48 AM, Bruno Desthuilliers wrote:
John Posner a écrit :
On 3/8/2010 11:55 PM, Gary Herron wrote:
The form of import you are using
from helpers import mostRecent
makes a *new* binding to the value in the module that's doing the
import.
What you can do, is not m
[ cross-posting to edu-sig ]
Bruno (and anyone else interested) --
As I promised/threatened, here's the *start* of a write-up on
properties, aimed at non-advanced Python programmers:
http://www.jjposner.net/media/python-properties-0310.pdf
I'm interested in corrections, of course. But I'm
On 3/11/2010 6:16 PM, gundlach wrote:
I *know* this already exists, but I can't remember where:
def pivot(func, seq):
# I know, a good implementation shouldn't call func() twice per item
return ( (x for x in seq if func(x)), (x for x in seq if not
func(x)) )
I feel like I read a thread in
On 3/10/2010 8:37 PM, Gabriel Genellina wrote:
En Wed, 10 Mar 2010 11:45:38 -0300, John Posner
escribió:
As I promised/threatened, here's the *start* of a write-up on
properties, aimed at non-advanced Python programmers:
http://www.jjposner.net/media/python-properties-0310.pdf
I&
On 3/21/2010 5:34 PM, Aahz wrote:
In article,
John Posner wrote:
Bruno (and anyone else interested) --
As I promised/threatened, here's the *start* of a write-up on
properties, aimed at non-advanced Python programmers:
http://www.jjposner.net/media/python-properties-0310.pdf
On 3/22/2010 11:44 AM, Bruno Desthuilliers wrote:
Another (better IMHO) solution is to use a plain property, and store the
computed value as an implementation attribute :
@property
def foo(self):
cached = self.__dict__.get('_foo_cache')
if cached is None:
self._foo_cache = cached = self._some
On 5/18/2010 4:15 PM, Art wrote:
If I am in Pdb, I would like to set a temporary variable, for example:
(Pdb) r = 1
The 'r' gets interpreted as 'return' by Pdb.
Is there a Pdb instruction that guarantees the intended effect, like:
(Pdb) let r = 1
I can usually avoid using such variable names
On 5/18/2010 4:54 PM, Chris Rebert wrote:
Suggested reading: http://docs.python.org/library/functions.html#property
I've placed a revision to this official *property* documentation at:
http://wiki.python.org/moin/AlternativeDescriptionOfProperty
There's also a gentle (I hope) intro to t
On 5/19/2010 5:51 PM, Steven D'Aprano wrote:
On Wed, 19 May 2010 21:58:04 +0200, superpollo wrote:
Rather than iterating over an index j = 0, 1, 2, ... and then fetching
the jth character of the string, you can iterate over the characters
directly. So the inner loop is better written:
for c in
On 5/27/2010 9:14 AM, Neil Cerutti wrote:
On 2010-05-27, eb303 wrote:
I've been using Python properties quite a lot lately and I've
found a few things that are a bit annoying about them in some
cases. I wondered if I missed something or if anybody else has
this kind of problems too, and if ther
On 6/29/2010 12:51 PM, Thomas Jollans wrote:
def rprimes():
def elim_mult(n):
yield n
for p in filter((lambda x:x%n != 0), elim_mult(n+1)): yield p
yield 1
for p in elim_mult(2): yield p
Thomas, take a look at the thread "Generators/iterators, Pythonicity,
an
On 7/2/2010 11:20 AM, Michael Torrie wrote:
On 07/01/2010 08:57 AM, Alan wrote:
I know drag& drop is not possible with TK.
Is this a Python Tk limitation or a Tk limitation in general? Google
suggests that Tk itself supports some form of dnd.
Which widget could I use for my
python applicat
On 7/14/2010 12:06 PM, Ethan Furman wrote:
... Have you tried this?
--> def foo():
... print locals()
... blah = 'interesting'
... print locals()
...
--> foo()
{}
{'blah': 'interesting'}
As can be clearly seen, blah does not exist before the assignment -- the
*name* blah has not been *bound* t
On 7/31/2010 11:08 AM, Christian Heimes wrote:
... All you have to do is subclass dict and implement a
__missing__ method. See
http://docs.python.org/library/stdtypes.html?highlight=__missing__#mapping-types-dict
Caveat -- there's another description of defaultdict here:
http://docs.python.
On 7/31/2010 2:00 PM, Christian Heimes wrote:
Your answer is confusing even me. ;)
Yeah, I get that a lot. :-)
Let me try an easier to understand explanation. defaultdict *implements*
__missing__() to provide the default dict behavior.
In my experience, the word *implements* is commonly u
On 7/31/2010 1:31 PM, John Posner wrote:
Caveat -- there's another description of defaultdict here:
http://docs.python.org/library/collections.html#collections.defaultdict
... and it's bogus. This other description claims that __missing__ is a
method of defaultdict, not of dict.
On 8/3/2010 12:54 PM, Ethan Furman wrote:
I think mentioning how __missing__ plays into all this would be helpful.
Perhaps in the first paragraph, after the colon:
if a key does not currently exist in a defaultdict object, __missing__
will be called with that key, which in turn will call a "d
On 8/3/2010 5:47 PM, Christian Heimes wrote:
So I'd rather not mention __missing__ in the first paragraph, which
describes the functionality provided *by* the defaultdict class. How
about adding this para at the end:
defaultdict is defined using functionality that is available to *any*
sub
On 8/3/2010 6:48 PM, Ethan Furman wrote:
Christian Heimes wrote:
I just went and read the entry that had the bogus claim --
personally, I didn't see any confusion. I would like to point out the
__missing__ is *not* part of dicts (tested on 2.5 and 2.6 -- don't
have 2.7 installed yet).
I beg yo
On 8/5/2010 12:33 AM, John Nagle wrote:
There's got to be a better way to do this:
def editmoney(n) :
return((",".join(reduce(lambda lst, item : (lst + [item]) if
item else lst,
re.split(r'(\d\d\d)',str(n)[::-1]),[])))[::-1])
Here's a more elegant variant, using regexp lookahead:
def thous_
On 8/5/2010 12:36 PM, MRAB wrote:
You don't need to reverse the string:
def thous_format(integer_string):
"""
add comma thousands separator(s) to an integer-valued string
"""
return re.sub(r"(?<=\d)(?=(?:\d\d\d)+$)", ",", integer_string)
Nice! My first encounter with a look-behind
On 8/2/2010 11:00 PM, John Posner wrote:
On 7/31/2010 1:31 PM, John Posner wrote:
Caveat -- there's another description of defaultdict here:
http://docs.python.org/library/collections.html#collections.defaultdict
... and it's bogus. This other description claims that __missing__ i
On 8/6/2010 6:24 PM, Wolfram Hinderer wrote:
This is probably nitpicking, but the patch calls __missing__ a special
method. However, unlike special methods, it is not invoked by "special
syntax" but by the dict's __getitem__ method. (len() invokes __len__
on any object - you can't do something s
On 8/12/2010 9:22 AM, Dave Angel wrote:
Now you have to find the largest number below 120, which you can
easily do with brute force
Dept of overkill, iterators/generators division ...
-John
#--
from itertools import imap, product, ifilter
from operator import mul
box_sizes =
On 8/12/2010 6:31 PM, News123 wrote:
candidate_box_counts = product(
xrange(target/box_sizes[0] + 1),
xrange(target/box_sizes[1] + 1),
xrange(target/box_sizes[2] + 1),
)
Couldn't this be rewritten as:
candidate_box_counts = product(
* [ xrange
On 8/13/2010 6:25 AM, Roald de Vries wrote:
On Aug 12, 2010, at 10:51 PM, John Posner wrote:
On 8/12/2010 9:22 AM, Dave Angel wrote:
Now you have to find the largest number below 120, which you can
easily do with brute force
tgt = 120 # thanks, Dave Angel
Anytime, but I'm not Dave
On 8/14/2010 10:52 AM, Baba wrote:
for n_nuggets in range(50):
result1 = can_buy(n_nuggets)
result2 = can_buy(n_nuggets+1)
result3 = can_buy(n_nuggets+2)
result4 = can_buy(n_nuggets+3)
result5 = can_buy(n_nuggets+4)
result6 = can_buy(n_nuggets+5)
if result1!=[]
On 8/15/2010 11:38 AM, Baba wrote:
In addition to the points that Emile and Ian made ...
def diophantine_nuggets(x,y,z):
cbc=0 #cbc=can_buy counter
packages =[x,y,z]
You can take advantage of a nifty "syntax convenience feature" here.
Instead of loading all of the function's argumen
On 8/16/2010 12:44 PM, Alex van der Spek wrote:
Anybody catches any other ways to improve my program (attached), you are
most welcome.
1. You don't need to separate out special characters (TABs, NEWLINEs,
etc.) in a string. So:
bt='-999.25'+'\t''-999.25'+'\t''-999.25'+'\t''-999.25'+'\t'+'
On 8/16/2010 4:18 PM, Baba wrote:
packages=[2,103,105]
min_size=min(packages[0],packages[1],packages[2])
or:
min_size = min(packages)
-John
--
http://mail.python.org/mailman/listinfo/python-list
On 8/18/2010 1:38 PM, [email protected] wrote:
To go the other way, if d = 1, then there exists integers (not
neccessarily positive) such that
a*x + b*y + c*z = 1
That fact is non-trivial, although the proof isn't *too* hard [1]. I
found it interesting to demonstrate the simpler cas
Hi --
a) Assume I would have some different widgets to add per row. How
do I get the maximum row height?
If you are placing widgets in a table like this:
w.grid(row=a, column=b)
... where the *master* of widget "w" is a Tkinter.Frame named
"table_frm", then you can determine the height
There's a working app at http://cl1p.net/tkinter_table_headers/
Thank you for this example. However, one issue to that...
When resizing the window (vertical) then the header moves away
from the table. How can I avoid this with the grid? With "pack"
I now this...
Oops ... packing can be tricky
Andras Szabo wrote:
Hello. I searched the archives but couldn't find a solution to a
problem related to the Entry widget in Tkinter.
When creating a pop-up window in an app, which contains an Entry
widget, I want this widget to contain some default string, to have all
this default string s
... I would also venture to say a key-map
of sorts that is available thru the help menu where one could push an
"Up" button, or a "rotate" button, and have the proper command
inserted in the prompt, and then have the command execute, may also
help make the connections here, a sort of *real* Visu
Certainly John- although I have not embedded the turtle module at all,
I just wrote my own.
OK, then why the statements "from turtle import *" in the modules
turtleprocess.py and turtlewidget.py?
Tx,
John
--
http://mail.python.org/mailman/listinfo/python-list
OK, then why the statements "from turtle import *" in the modules
turtleprocess.py and turtlewidget.py?
Yes, I see that now (he said meekly, too sheepish to complain about
being misled by an unfortunate naming choice).
Tx,
John
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Use the iterparse() function of the xml.etree.ElementTree package.
http://effbot.org/zone/element-iterparse.htm
http://codespeak.net/lxml/parsing.html#iterparse-and-iterwalk
Stefan
iterparse() is too big a hammer for this purpose, IMO. How about this:
from xml.etree.ElementTree import E
While refactoring some code, I ran across an opportunity to use a
conditional expression. Original:
if total > P.BASE:
excessblk = Block(total - P.BASE, srccol, carry_button_suppress=True)
else:
excessblk = None
Is there any consensus on how to format a conditional expression that i
My choice would be
excessblk = None
if total > P.BASE:
excessblk = ...
Diez and Jean-Michel,
Ha! Your suggestion above was my *original* coding. It looks like I'm
evolving backwards!
But doesn't it violate the DRY principle? The token "excessblk" appears
twice instead of once.
Than
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