Python函数、模块、类、异常处理

def 函数(参数):
    函数执行体
    [函数返回值]

def add(x,y):
    return x+y


z = add(1,2)

print(z)  # 3

def f(x):
    x = 10
f(100)

z = f(100)
print(z)    #None

#add定义参数
def add(x,y,*args):
    """
    *args  可变长度元组
    :param x:
    :param y:
    :param args:
    :return:
    """
    # 选运算 args 中的数字之和
    sum = 0
    print(args)
    for a in args:
        sum = sum +a
    return x+y+sum     #返回值
    # print(x,y)
sum = (31,45,70,88)
#调用参数
sums = add(1,2,*sum)
print(sums)