首先:
def f():
print('first') def g():
f() g() def f():
print('second') g()
结果:
>>>
first
second
又来:
def g():
f() g() def f():
print('second') g()
结果:
NameError: global name 'f' is not defined
再来:
def g():
f() def f():
print('second') g()
结果:
>>>
second