In Python 3, free variable and nonlocal variable are synonym terms? Or is
there a difference, like a free variable is a variable that is not a local
variable, then nonlocal variables and global variables are both free variables?
Thanking you in advance,
Bartolomé Sintes
--
Hi,
I thought that x += ... was the same than x = x + ..., but today I have
realized it is not true when operating with mutable objects.
In Python 3.3 or 2.7 IDLE (Windows) compare:
a = [3]
b = a
a = a + [1]
b
[3]
and
a = [3]
b = a
a += [1]
b
[3, 1]
Is this behaviour explained in the
In Python 3.3 for Windows, every list gets a different id when it is created:
id([3])
46555784
id([3])
47920192
id([4])
46532048
But if I write a tuple asking for the ids of two lists, each list seems to get
the same id:
id([3]), id([4])
(43079000, 43079000)
I was expecting a tuple with
OK. Now I understand it.
I was confused because when two list are created in two different lines, Python
gives them different ids, but when the two lists are created in the same line
(in a tuple) Python gives them the same id. It doesn't really matter as these
lists are just created and
