#!/usr/bin/env python
#-*- coding:utf-8 -*-
# author: xiatian

'''
def func():
    print("哈喽，你好呀!" )
    return 0

func()

def func1(x,y):
    print(x)
    print(y)

func1(2,6)

def test(x,y,z):
    print(x)
    print(y)
    print(z)

test(3,2,6)


def test(x,y=2):
    print(x)

test(1,8)

def calc(n):
    print(n)
    return calc(n+1)

calc(0)

'''

