stretching list comprehensions
Delaney, Timothy C (Timothy)
tdelaney at avaya.com
Tue Aug 12 01:43:36 CEST 2003
> From: Simon Burton [mailto:simonb at webone.com.au]
> >>> del y
> >>> nums = [ x+y for x in range(y) for y in range(10) ]
> Traceback (most recent call last):
> File "<stdin>", line 1, in ?
> NameError: name 'y' is not defined
That is exactly equivalent to:
nums = 
for x in range(y):
for y in range(10):
nums.append(x + y)
I'll leave it to you to work out the required modification to make the above list comprehension work.
As a rule of thumb - keep list comprehensions very simple. Otherwise they become incomprehensible ...
More information about the Python-list