python中匿名函数的命名规则

#匿名函数
sum =lambda x,y:x+y
sub =lambda x,y:x-y
mul =lambda x,y:x*y
div =lambda x,y:x/y
mod =lambda x,y:x%y
print("输入两个数之和",sum(10,20))
print("输入两个数之差",sub(10,20))
print("输入两个数之积",mul(10,20)
)print("输入两个数之商",div(10,20))