Variable scope issue

[melvin13]

Hello,
here's a simplified version of what's causing me trouble :

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x = int   def init(): #     x = 0     return   def f():     x += 1     return   init() f() f() print(x)

Error:
8: Local variable 'x' defined in enclosing scope on line 1 referenced before assignement

What does this error mean in this context ? Aren't variables defined outside of functions set to global by default ?
Thank you !

[Gribouillis]

No. Variables on the left hand side of the = operator are local by default.

[melvin13]

Thank you !