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def 函数名():
return
def test1():
print('test1')
def test2():
print('test2')
test2()
test1()在递归的时候记得要有一个出口,不然会无限递归下去,直到内存溢出
def test1():
print('test1')
test1()
test1()num = 10
def test1():
global num
num = 20
print(num)
def test2():
print(num)
test1()
test2()