The difference between Python arrays and lists:
1. Numpy is a library dedicated to data processing, which can well support some mathematical operations, while lists are more troublesome for mathematical operations, for example:
a = [1, 2, 3, 4]
b = np.array([1, 2, 3, 4]）
c = a * 2
d = b * 2
print(c)
print(d)
Output result:
[1, 2, 3, 4, 1, 2, 3, 4]
[2 4 6 8]
2. The list stores one-dimensional data, while the array can store multi-dimensional data. E.g:
e = [[1, 2], [3, 4], [5, 6]]
f = np.array([［1， 2］，[3, 4], [5, 6] ])
print(e)
print(f)
The output result is:
[[1, 2], [3, 4], [5, 6]]
[[1 2]
[3 4]
[5 6]]