On 22.12.2010 17:40, William Gill wrote:
> I am teaching an 11 year old who wants to learn programming. I chose
> Python, and it is working well. I seem to remember lots of simple
> script games, like quizzes, number games etc. that would be good for his
> tutorial. However, now all I can find i
Hello,
On 12/20/2010 11:08 AM, MarcoS wrote:
> Hi, I need to create a list with a dynamic name, something like this:
>
> '%s_list' %my_dynamic list = []
>
> It's this possible?
I would suggest you use a dictionary to store your lists like this:
lists = {}
lists[my_dynamic_list] = []
Maybe yo
On 10/26/2010 07:22 PM, Ian Kelly wrote:
> >>> i = 5
> >>> l = [i**2 for i in range(3)]
> >>> i
> 2
>
>
> This has been corrected in Python 3.
Sorry. You're right. I forgot to mention that...
Andre
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Hello,
I occasionally use LCs, if they seem useful. However, what I don't like
about LCs is that they 'look-like' being a closed scope, while actually
they are in the scope of there call. Example:
>>> i = 5
>>> l = [i**2 for i in range(3)]
>>> i
2
Regards
Andre
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http://mail.python.org/mailm
On 10/12/2010 06:22 PM, Ian Kelly wrote:
> That's the inverse of what the OP wanted. The full solution:
>
A[~isnan(B)]
> array([2, 3])
Indeed, you are right Ian. Thanks for pointing that out. :)
Sorry for the mistake.
Regards
Andre
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Hi Kenny,
On 10/12/2010 05:58 AM, Kenny wrote:
> I have an array A, and another one B with same dimention and size. Now I
> want to change the delete the elements in A where the same position in B
> is nan. How can I do.
>
> Similar to the matlab code A(find(isnan(B)) = []
How about this:
>>> f
On 09/16/2010 08:24 AM, Andre Alexander Bell wrote:
or you could write the loop
>>> m1m2 = np.empty_like(m1)
>>> for i in range(m1m2.shape[0]):
... m1m2[i] = np.dot(m1, m2)
This should have been
... m1m2[i] = np.dot(m1[i], m2[i])
Sorry for the typo.
Andre
--
http
Hi,
I assume you have arrays like these:
>>> import numpy as np
>>> m1 = np.random.rand(size=(4,3,3))
>>> m2 = np.random.rand(size=(4,3,3))
So that m1[0] is a 3x3 Matrix and m1[1] is another one, i.e. you have
four matrices.
On 09/15/2010 01:54 AM, Gregory Ewing wrote:
I had thought that do
On 09/15/2010 10:48 AM, Peter Otten wrote:
I personally would not be too concerned about the leading underscore, but
you can use
string.Formatter().parse(template)
instead.
Thanks for this pointer. I like it this way. So if I now combine your
generator with your suggestion, I end up with som
On 09/15/2010 10:00 AM, Peter Otten wrote:
def extract_names(t, recurse=1):
for _, name, fmt, _ in t._formatter_parser():
if name is not None:
yield name
if recurse and fmt is not None:
for name in extract_names(fmt, recurse-1):
yi
On 09/14/2010 08:20 PM, Miki wrote:
You can use ** syntax:
english = {'hello':'hello'}
s.format(**english)
Thanks for your answer. Actually your answer tells me that my example
was misleading. Consider the template
s = 'A template with {variable1} and {variable2} placeholders.'
I'm seeking
Hello,
I'm used to write in Python something like
>>> s = 'some text that says: %(hello)s'
and then have a dictionary like
>>> english = { 'hello': 'hello' }
and get the formatted output like this:
>>> s % english
Occasionally I want to extract the field names from the template string.
I w
On 07/19/2010 01:18 PM, dhruvbird wrote:
> Hello,
> I have a list of integers: x = [ 0, 1, 2, 1, 1, 0, 0, 2, 3 ]
> And would like to compute the cumulative sum of all the integers
> from index zero into another array. So for the array above, I should
> get: [ 0, 1, 3, 4, 5, 5, 5, 7, 10 ]
> Wh
On 07/16/2010 06:01 PM, Ray wrote:
> if __name__=='__main__':
> for x in range(10):
> x=Test()
> """
> the question is how do i call x.value outside of that for loop?
> something like
> print x.value ?
> """
You would have to keep references to your Test objects (untested code):
On 07/11/2010 10:30 AM, rantingrick wrote:
> On Jul 11, 3:03 am, "Günther Dietrich"
> wrote:
>
>> So, it is not a disadvantage that the functions you listed above are
>> named in this way. In the contrary, it is an advantage, as it keeps
>> newcomers from using stupid variable names.
>
> "int" f
On 07/03/2010 07:48 PM, mo reina wrote:
> an anyone recommend a resource (book,tutorial,etc.) that focuses on
> application development in python? something similar to Practical
> Django Projects, but for stand alone applications instead of web apps
> (for now).
I think you are referring to GUI ap
On 06/29/2010 06:46 PM, WANG Cong wrote:
> On 06/29/10 17:48, Andre Alexander Bell wrote:
>>>>> var a
>>>>> a
>> -> should raise an variable 'unset' exception
>>
>> Keep in mind that the module you are writing in is just an object a
On 06/25/2010 03:15 PM, WANG Cong wrote:
> 1) Modifying a class attribute is metaprogramming, and this is modifying
> a class, i.e. adding a new attribute to it, thus this should belong
> to metaprogramming. (I know, strictly speaking, maybe my definition of
> "metaprogramming" here is incorrect, I
On 06/22/2010 02:03 PM, Jerry Rocteur wrote:
>> On Tue, Jun 22, 2010 at 9:32 PM, Jerry Rocteur wrote:
>> If you were able to ask us perhaps a more specific question
>> and describe your problem a little more concisely perhaps
>> I (and we) might have a bit more to offer you.
>
> I have a dictiona
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On 06/22/2010 01:32 PM, Jerry Rocteur wrote:
> My input is NOT CSV, I used this format to try and make the question shorter.
> Although I could create a CSV file, I'd
> like to learn how to code a class to work the way I described in the question.
So
On 06/22/2010 12:05 PM, Jerry Rocteur wrote:
> Sorry for the long mail but I've been searching the web for days for how to
> do this.. I see that possibilities using
> shelve or pickle but I don't want to do this (The source of the data changes
> constantly)
You might be interested in the csv mo
On 06/21/2010 05:38 AM, Michele Simionato wrote:
>>> A few weeks ago I presented on this list my most recent effort, plac.
>>> http://micheles.googlecode.com/hg/plac/doc/plac_ext.html
>>
>> But this one is broken. :(
>
> Aagh! The good one is
> http://micheles.googlecode.com/hg/plac/doc/plac_adv
On 06/20/2010 11:22 AM, Michele Simionato wrote:
> A few weeks ago I presented on this list my most recent effort, plac.
> Now there is a *huge* new release:
> the size of plac and of its documentation doubled.
> [...]
>
> http://micheles.googlecode.com/hg/plac/doc/plac.html
I've read this one..
On 06/20/2010 11:22 AM, Michele Simionato wrote:
> A few weeks ago I presented on this list my most recent effort, plac.
> Now there is a *huge* new release:
> the size of plac and of its documentation doubled.
How about adding some support for internationalization of the generated
usage output?
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On 06/18/2010 05:53 PM, Mark Lawrence wrote:
> Andre, looks like a really bad day for you then, *TWO* nights out with
> me *AND* (looking at your email address) Germany loosing in the world
> cup. :(
There are days one looses and there are days the ot
On 06/18/2010 03:32 PM, Mark Lawrence wrote:
> The good news is that this is easily the fastest piece of code that I've
> seen yet. The bad news is that first prize in the speed competition is
> a night out with me. :)
Well, that actually means that Stefan Behnel will run my solution
through cyth
On 06/16/2010 12:47 PM, Lie Ryan wrote:
> Probably bending the rules a little bit:
>
sum(x**2 - 8*x - 20 for x in range(1, 2010, 5))
> 536926141
Bending them even further, the sum of the squares from 1 to N is given by
(1) N*(N+1)*(2*N+1)/6.
The given problem can be divided into five sums
On 06/15/2010 01:49 PM, superpollo wrote:
> my solution:
>
> [...]
> >>> print s
> 536926141
Or, if you would like to use numpy:
>>> import numpy
>>> squares = numpy.arange(1, 2011, dtype=numpy.int)**2
>>> signs = numpy.ones(len(squares), dtype=numpy.int)
>>> signs[3::5] = -1
>>> signs[4::5] = -1
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