> for index, color in enumerate(color
> for animal in zoo
> for color in animal):
> # the something more goes here.
> pass
I've been thinking about these nested generator expressions and list
comprehensions. How come we write:
a for b in c for a in b
instead of
a for a in b for b in c
More detailed example follows below.
I feel the latter variant is more intuitive. Could anyone please explain the
fault of my logic or explain how I should be thinking about this? Or point me
to somewhere where I can read up on this?
Cheers,
Joel Hedlund
More detailed example:
>>> c = [[1,4,8],[2,5,7]]
>>> [a for b in c for a in b]
[1, 4, 8, 2, 5, 7]
>>> del a,b,c
>>> c = [[1,4,8],[2,5,7]]
>>> [a for a in b for b in c]
Traceback (most recent call last):
File "<pyshell#30>", line 1, in -toplevel-
[a for a in b for b in c]
NameError: name 'b' is not defined
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