Python动态展现之一

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