Is there any simple way to declare a null array of size n in python?

Answer 1

import numpy as np
arr = np.empty(10)

print(arr)

# the array is printed similar to a zero-like one, but in fact its values are not being initialized -- array-wise it is like it's full of 'None's

Answer 2

array = [None] * n
#But I don't think you really want to declare the size of a list in Python in advance, since you can use the append method of list

Answer 3

array=[]