函数式编程

编程的三种方法论：

1面向过程

2函数式

3面向对象

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#把函数当做参数传给另一个函数
def foo(n):
    print(n)

def bar(name):
    print(‘my name is %s‘ %name)

foo(bar(‘alex‘))
输出结果：
my name is alex
None


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#返回值当中包含函数
def bar():
    print(‘from bar‘)
def foo():
    print(‘from foo‘)
    return bar
n = foo()
n()

def handle():
    print(‘from handle‘)
    return handle
h = handle()
h()

def test1():
    print(‘from test1‘)

def test():
    print(‘from handle‘)
    return test1()
test()