micropython/tests/basics/scope_implicit.py

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# test implicit scoping rules
# implicit nonlocal, with variable defined after closure
def f():
def g():
return x # implicit nonlocal
x = 3 # variable defined after function that closes over it
return g
print(f()())
# implicit nonlocal at inner level, with variable defined after closure
def f():
def g():
def h():
return x # implicit nonlocal
return h
x = 4 # variable defined after function that closes over it
return g
print(f()()())
# local variable which should not be implicitly made nonlocal
def f():
x = 0
def g():
x # local because next statement assigns to it
x = 1
g()
try:
f()
except NameError:
print('NameError')