Convert list of list to array

We can use numpy ndarray tolist() function to convert the array to a list. If the array is multi-dimensional, a nested list is returned. For one-dimensional array, a list with the array elements is returned.

NumPy Array to List

The tolist() function doesnt accept any argument. Its a simple way to convert an array to a list representation.

1. Converting one-dimensional NumPy Array to List

import numpy as np # 1d array to list arr = np.array([1, 2, 3]) print(f'NumPy Array:\n{arr}') list1 = arr.tolist() print(f'List: {list1}')

Output:

NumPy Array: [1 2 3] List: [1, 2, 3]

2. Converting multi-dimensional NumPy Array to List

import numpy as np # 2d array to list arr = np.array([[1, 2, 3], [4, 5, 6]]) print(f'NumPy Array:\n{arr}') list1 = arr.tolist() print(f'List: {list1}')

Output:

NumPy Array: [[1 2 3] [4 5 6]] List: [[1, 2, 3], [4, 5, 6]]

Reference: API Doc