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UninitializedLocal.py

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def test():

var = 1

def print_var():

print var # Use variable from outer scope

print_var()

print var

def test1():

var = 2

def print_var():

print var # Attempt to use variable from local scope.

var = 3 # Since this is not initialized yet, this results

print_var() # in an UnboundLocalError

print var

def test2():

var = 2

def print_var():

var = 3 # Initialize local version of the variable

print var # Use variable from local scope.

print_var() # Note that this local variable "shadows" the variable from

print var # outer scope which makes code more difficult to interpret.

def test3():

var = 4

def print_var():

nonlocal var # Use non-local variable from outer scope.

print var

print_var()

print var