Is it possible to modify variable in python that is in outer, but not global, scope?

Question

Given following code:

def A() :
    b = 1

    def B() :
        # I can access \'b\' from here.
        print( b )
        # But can i modify \'b\' here? \'         


        

Answer 1

I'm a little new to Python, but I've read a bit about this. I believe the best you're going to get is similar to the Java work-around, which is to wrap your outer variable in a list.

def A():
   b = [1]
   def B():
      b[0] = 2
   B()
   print(b[0])

# The output is '2'

Edit: I guess this was probably true before Python 3. Looks like nonlocal is your answer.