Consider the following:
>>> a = {1:2, 3:4, 2:5}
Say that i want to get the keys of a, sorted. First thing I tried:
>>> b = a.keys().sort()
>>> print b
None
Doesn't work. Probably because I am actually trying to sort the keys
of the dictionary without copying them first. If that is the case,
fine. Next thing I do:
>>> b = a.keys()
>>> b.sort()
[1, 2, 3]
Works fine, but I would really like it if I could somehow do it in one
line. As the problem seems to be copying the object, i try the
following:
>>> import copy
>>> b = copy.copy(a.keys()).sort()
>>> print b
None
Hmmm, why doesn't it work? Also,
>>> b = copy.deepcopy(a.keys()).sort()
>>> print b
None
(not that I thought that deepcopy will work since shallow didn't, I
understand the difference :) )
Obviously, I am missing something here. What am I thinking wrong? Why
doesn't copying the object work?
Thanks for all the help
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