python开发基础(三)数学函数与python函数

# 函数
def functions(x):
    """
    functions test
    """
    x += 1
    y = x ** 2
    return x, y


functions = functions(x=5)
# print(functions)


"""
def: 定义函数的关键字
function: 函数名
(): 参数,多个参数用逗号隔开
x += 1, y = x**2: 代码块的处理逻辑
return: 定义返回值
"""


# 例子
def function_1():
    # num = int(input(‘请输入密码:‘))
    num = 123
    yes = ‘密码正确!‘
    no = ‘密码错误,请重新输入!‘
    if num != 123:
        return no
    return yes


function_1 = function_1()
print(function_1)


# 函数参数
# 形参
def function_2(x, y):
    count_2 = x ** y
    return count_2


function_2 = function_2(3, 2)
print(function_2)


# 实参一一对应
def function_3(x, y, z):
    return x, y, z


function_3 = function_3(x=1, y=3, z=2)
print(function_3)


# 参数组 **字典 *列表
def function_4(x, *y):
    return x, y


def function_5(x, **y):
    return x, y


# function_4 = function_4(1, 2, 3, 4, 5)
function_4_1 = function_4(1, {‘1‘: ‘1‘}, {‘2‘: ‘2‘})
function_5 = function_5(1, name=‘Jack‘, age=18, adders=‘China‘)
# print(function_4)
print(function_4_1)
print(function_5)


# def functions(*, *args, **kwargs)
def function_6(x, *y, **z):
    return x, y, z


function_6 = function_6(1, 2, 3, 4, 5, 6, a=‘a‘, b=‘b‘)
print(function_6)