[os.path.join(r'E:\Python', name) for name in []] returns []
Dave Angel
davea at davea.name
Tue Jan 29 08:36:21 EST 2013
On 01/29/2013 08:21 AM, iMath wrote:
> why [os.path.join(r'E:\Python', name) for name in []] returns [] ?
> please explain it in detail !
>
[ os.path.join(r'E:\Python', name) for name in [] ]
It'd be nice if you would explain what part of it bothers you. Do you
know what a list comprehension is? Do you know how to decompose a list
comprehension into a for-loop? Do you know that [] is an empty list object?
res = []
for name in []:
res.append( XXXX )
Since the for loop doesn't loop even once, the result is the initial
value, the empty loop.
--
DaveA
More information about the Python-list
mailing list