Beautiful and concise Python (3)

Let’s continue to share what a line of Python code can accomplish today! It is recommended to collect, it is really useful! ! !

One, Lambda expression

• Lambda expression with 1 parameter

p = lambda x:x**2
print(p(3))

• Lambda expression with 2 parameters

p = lambda x,y:x*(y**2)
print(p(3,4))

• Lambda expression with multiple parameters

p = lambda x, y, z: x * y * z
print(p(1, 2, 3))

Second, check the existence of numbers in the list

• Example

ls = [1,2,3,4,5,6]
num = int(input('请输入num:'))
if num in ls:
        print('存在')

Three, factorial operation

• First we import the Python library math

import math

• Example

def f1(n):
    return math.factorial(n)
n = int(input('请输入数字n：'))
result = f1(n)
print(result)