# -*- coding: utf-8 -*-
#函数
def func1():
    """testing1"""
    print(‘in the func1‘)
    return 0

#过程  即没有返回值的函数
def func2():
    """testing2"""
    print(‘in the func2‘)

x=func1()
y=func2()

print(‘from func1 return is %s‘%x)
print(‘from func2 return is %s‘%y)

in the func1
in the func2
from func1 return is 0
from func2 return is None

# -*- coding: utf-8 -*-
def test(x,y):
    print(‘x=%d‘%x)
    print(‘y=%d‘%y)

test(y=2,x=1)#关键字调用，与形参顺序无关

x=1
y=2

# -*- coding: utf-8 -*-
def test(x,y):
    print(‘x=%d‘%x)
    print(‘y=%d‘%y)

test(1,2)   #位置参数调用，实参与形参位置一一对应

x=1
y=2

# -*- coding: utf-8 -*-
def test(x,y,z):
    print(‘x=%d‘%x)
    print(‘y=%d‘%y)


test(3,z=2,y=6)#关键字要放在位置参数的后面

x=3
y=6