En Tue, 25 Sep 2007 14:48:29 -0300, <[EMAIL PROTECTED]> escribi�: > On Sep 25, 7:07 pm, Zentrader <[EMAIL PROTECTED]> wrote: >> Note that in list comprehension, [x for x in (1, 2, 3)], the >> for loop allocates memory the same way, but the scope changes so that >> "x" is visible outside the for loop, > > How is this different? The variable spilling of list comprehension is > the same as for regular for loops.
The fact that list comprehensions "leak" its loop variable is an unfortunate accident and will be corrected in Python 3.0 > The (#) and (##) lines below don't > print the same value of j. > >>>> for j in range(3): > ... print j, "first loop" (#) > ... for j in range(3): > ... print " ", j, "2nd loop" > ... print j, "first loop, again?" (##) Because neither list comprehensions nor for loops start a new scope. j is a global here, might be local to the enclosing function if any. Anyway, all j's are the same variable. -- Gabriel Genellina -- http://mail.python.org/mailman/listinfo/python-list
