Python List计算列表平方的9种常见方法

numbers = [1, 2, 3, 4, 5]
squared_numbers = []
for num in numbers:
    squared_numbers.append(num ** 2)
print(squared_numbers)

numbers = [1, 2, 3, 4, 5]
squared_numbers = [num ** 2 for num in numbers]
print(squared_numbers)

numbers = [1, 2, 3, 4, 5]
squared_numbers = list(map(lambda x: x ** 2, numbers))
print(squared_numbers)

numbers = [1, 2, 3, 4, 5]
def square(x):
    return x ** 2
squared_numbers = list(map(square, numbers))
print(squared_numbers)

import numpy as np
numbers = [1, 2, 3, 4, 5]
squared_numbers = np.square(numbers)
print(squared_numbers)

numbers = [1, 2, 3, 4, 5]
squared_numbers = (num ** 2 for num in numbers)
squared_numbers = list(squared_numbers)
print(squared_numbers)

import math
numbers = [1, 2, 3, 4, 5]
squared_numbers = [math.pow(x, 2) for x in numbers]
print(squared_numbers)

import operator
numbers = [1, 2, 3, 4, 5]
squared_numbers = list(map(operator.mul, numbers, numbers))
print(squared_numbers)

numbers = [1, 2, 3, 4, 5]
squared_numbers = []
for i, num in enumerate(numbers):
    squared_numbers.append(numbers[i] ** 2)
print(squared_numbers)

#-*- coding：utf-8 -*-

def pow2(arg):
    return arg**2

def pow2List(listarg):
    mapObj = map(pow2, listarg)
    result = list(mapObj)
    return result

print(pow2List([1,-1,0,3,5]))

>>> list1 = [-1,0,5,6,15]
>>> [x**2 for x in list1]