Please try adding "global x" to the beginning of f().
On Wed, Dec 8, 2010 at 10:06 AM, alust <al...@alust.homeunix.com> wrote: > Hello, > > Can somebody explain this strange (to me) effect please. > > In this program it is impossible to access a global variable within a > function: > > $ cat /tmp/test.py > x='xxx' > def f(): > print x > del x > > f() > > $ python /tmp/test.py > Traceback (most recent call last): > File "/tmp/test.py", line 6, in <module> > f() > File "/tmp/test.py", line 3, in f > print x > UnboundLocalError: local variable 'x' referenced before assignment > > But if we comment the del operator the program will work: > > $ cat /tmp/test.py > x='xxx' > def f(): > print x > #del x > > f() > > $ python /tmp/test.py > xxx > > So why in this example the print operator is influenced by del > operator > that should be executed after it? > > -- > Thanks, Alexei > -- > http://mail.python.org/mailman/listinfo/python-list > -- http://mail.python.org/mailman/listinfo/python-list
