Trouble with nested scopes when trying to rebind a variable
frr at easyjob.net
Fri Nov 21 15:16:36 CET 2003
I have a parameter defined in a module, called PREVIEW. Many functions use
it's value to modify their behavior.
A function called dispatch checks the user arguments in sys.argv and calls the
appropriate function. It should also modify the value of PREVIEW depending on
the user input.
And here's where I get into trouble: if I write something like PREVIEW = None
inside the body of a function, it doesn't modify the value of the existing
PREVIEW variable, it creates a new variable in the function scope.
How can I modify the external PREVIEW variable?
In Lisp there are different operators to rebind an existing variable and to
create a new variable. How do you do this in python?
More information about the Python-list