array in class

[alefajnie]

class A:
   this_is_original_variable_only_for_one_inctance = 0

   def __init__(self, v):
   self.this_is_original_variable_only_for_one_inctance = v


class B:
  this_is_common_for_all_instances = []

  def __init__(self, v):
self.this_is_common_for_all_instances.append(v)



now I can create some instances of B, but all of them have the same
array, why

if I use append for b1.this_is_common_for_all_instances, the b2, b3
will have been changed that array.
(where bi is instance of B)
but changes on this_is_original_variable_only_for_one_inctance works
fine

why it does that?
and how create array in class - normal array, "private variable"
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Graphical grammar in python

[alefajnie]

hi

Is exist any graphical library with resize, rotate, shape
recognition, ...?
suitable for graphical grammar

at this moment I have OpenGL (resize & rotate) and recognition solved
as saved set of shapes (classes)
feel free to write down any ideas  :)
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what does int means for python ?

[alefajnie]

#!/usr/bin/env python

arr = [[0 for c in range(0, 10)] for r in range(0, 10)] #
10x10 array

arr[2,3] # throws TypeError: list indices must be
integers
arr[int(2), int(3)] # also throws TypeError: list indices must be
integers !

-
what is wrong in above script ?


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Re: what does int means for python ?

[alefajnie]

>
> try arr[2][3] instead.
>
> basically your version is trying to index an array with a tuple argument 
> (2,3).
>
> --irmen


oh, you're right.

btw, is any simple way to create multi-dimension array ?
any built-in function ?
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