Python 3.x 如何找到数组中元素的绝对值？

例如，假设我的数组是

I have an array containing some negative values. how can i find the absolute value?

我想要一个数组

arr_out=[2,5,0,1,2]

不使用numpy，使用列表理解：

import numpy as np

arr = [-2,-5,0,1,2] 

print("Absolute value: ", np.absolute(arr))

输出：

[2,5,0,1,2]

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可以从旧数组创建新数组，并将负值转换为正值

import numpy as np

arr = [-2,-5,0,1,2] 

print("Absolute value: ", np.absolute(arr))

arr = [-2,-5,0,1,2]
arr_out = [abs(i) for i in arr]

print(arr_out)