python

在python中， def名可以作为参数在def中传递，在使用这个def名的参数时，要添加这个def原有的参数。

例:
def a(msg):
print "i am a"
print(msg)

def c(msg):
print "i am c"
print(msg)

def b(fun):
print "into b"
fun("hello")
print "out b"

if __name__ == "__main__":
b(a)
b(c)

输出：
into b
i am a
hello
out b
into b
i am c
hello
out b