Scope

• Functions in Python
• Variables created in functions are scoped in that function

global variable

• Variables not declared in a function
• accessible from any function within the same module or script

"""Won't work!"""
total = 0
def increment():
	total == 1
	return total
 
increment() #ERRORRRRR
 
"""Works using global keyword"""
def increment():
		global total 
		total += 1
	return total
 

nonlocal variable

• used in nested functions to indicate that a variable refers to a variable in the nearest enclosing scope that is not global

def outer():
	count = 0
	def inner():
		nonlocal count <<<<<<
		count += 1
		return count
	return inner()

• nonlocal allows us to modify the count variable that was only locally available in the outer() function
• not used commonly but useful for imaging scope