"Maric Michaud" <[EMAIL PROTECTED]> wrote in message news:[EMAIL PROTECTED] |I faced a strange behavior with generator expression, which seems like a bug, for both | python 2.4 and 2.5 :
Including the latest release (2.5.2)? | >>> class A : | ... a = 1, 2, 3 | ... b = 1, 2, 3 | ... C = list((e,f) for e in a for f in b) | ... | Traceback (most recent call last): | File "<stdin>", line 1, in <module> | File "<stdin>", line 4, in A | File "<stdin>", line 4, in <genexpr> | NameError: global name 'b' is not defined If you switch 'a' and 'b' in the expression, it will be 'a' that is not defined. There was/is a known issue with generator expressions (but not list comps) treating 'for' clauses after the first differently from the first in respect to variable resolution. I believe I have seen this discussed on PyDev list. But I searched the bugs.python.org for 'generator expression' and '_ _s' and got no relevant hits. | Any comment ? I'm ready to report it as a bug if there is no objection. If this is in 2.5.2, (and not one else objects), go ahead. tjr -- http://mail.python.org/mailman/listinfo/python-list
