Python 函数简介 之二

def test1():
    print("in the test1")
    return ‘end‘
def test2():
    print("in the test2")
def test3():
    print("in the test3")
    return 1, ‘Hello‘,[‘Frank‘,‘Lee‘],{‘name‘:‘Frank‘}  #返回一个元组

x = test1()
y = test2()
z = test3()
print(x)
print(y)
print(z)

#结果
in the test1
in the test2
in the test3
end
None
(1, ‘Hello‘, [‘Frank‘, ‘Lee‘], {‘name‘: ‘Frank‘})  #元组

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


test(1,2) #位置调用
print("------------我是分割线------------")
test(y=2,x=1) #关键字调用


#结果：
1
2
------------我是分割线------------
1
2

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

test(1)
test(1,3)

#结果
1 2
1 3

def conn(host,port=3306):
    print(host,port,sep=‘:‘)
conn("mysql-test")


#结果
mysql-test:3306