Python基本函数(一)

def fib(n=2,a=1):#参数可以有默认值
    """这里给函数写文档注释"""
    for i in range(n):
        print a


>>>f=fib #可以用一个变量表示函数
>>>f(3)
1
1
1

def make_incrementor(n):
    return lambda x: x+n

f=make_incrementor(n)
#f等价于
#def f(x):
# return x+n

def test(*args,**dic):
    for arg in args :
        print arg
    for k,v in dic.iteritems():
        print k ,':',v

>>>sum(i*i for i in range(10))
285

def reverse(data):
    for index in range(len(data)-1,-1,-1):
        yield data[index]

for char in reverse("golf"):
    print char,