Leandro Pereira de Lima e Silva schrieb am 16.10.2015 um 16:04: > I've think I've found a bug in Cython (or is this just a funny feature?). > The error occurs when the variable name used as source for the iteration is > also used as a value. > > Given the files test1.pyx (cython) and test2.py (python): > > test1.pyx: > def test(): > x = range(10) > return [x for x in x] > > test2.py: > def test(): > x = range(10) > return [x for x in x]
Note that you could just compile test2.py in Cython. No need to change the suffix. > The results in running them are: > >>> import test1, test2 > >>> test1.test() > Traceback (most recent call last): > File "<stdin>", line 1, in <module> > File "test1.pyx", line 4, in test1.test > (/Users/leandro/.pyxbld/temp.macosx-10.6-intel-3.4/pyrex/test1.c:666) > return [x for x in x] > UnboundLocalError: local variable 'x' referenced before assignment Yes, that's a known bug. Pops up every once in a while, difficult to fix, easy to work around. http://trac.cython.org/ticket/600 Stefan _______________________________________________ cython-devel mailing list cython-devel@python.org https://mail.python.org/mailman/listinfo/cython-devel
