generator expression works in shell, NameError in script
greg at cosc.canterbury.ac.nz
Fri Jun 19 00:28:10 EDT 2009
> This is certainly an odd one. This code works fine under 2.6 but fails
> in Python 3.1.
> ... lst=
> ... gen=[lst.index(e) for e in lst]
In 3.x it was decided that the loop variables in a list
comprehension should be local, and not leak into the
surrounding scope. This was implemented by making the
list comprehension into a nested function.
Unfortunately this leads to the same unintuitive
behaviour as a genexp when used in a class scope.
More information about the Python-list