trouble with copy/deepcopy

[Alexander]

Привет Marc!

16 мая 2005 в 22:18, Marc 'BlackJack' Rintsch в своем письме к All писал:

 MR> That clears only one dictionary at class level.  Which is visible on
 MR> both instances.

 MR> class Distribution:
 MR>     def __init__(self):
 MR>         self.__gr_on_transp = dict()
 MR>         self.__ostatok_m = dict()
 MR>     ...

 MR> This creates *instance variables* which should be deepcopied
 MR> without problems.
Hmm. I don't find definition of "class variable" in manual. I try to test it on
such a simple test and find that such variable is NOT shared between copies:

class C:
  q=int()

c1=C()
c2=C()
c1.q=5
c2.q=10
print c1.q
#5
print c2.q
#10

After deepcopy of c1 or c2, all classes have own copy of q. After replacing
integer q on dictionary, results are the same. There is an error?

Alexander, zatv at bk.ru