Convert list of list to 2D array python

How to create 2D array from list of lists in Python

This Python tutorial will show you how to create a 2D array from a list of lists in Python. To learn this you need to have the below basic concepts of Python.

• list and array are not the same.
• You need to use NumPy library in order to create an array

If you have a list of lists then you can easily create 2D array from it.

Create 2D array from list in Python

Lets understand this with an example.

Here is our list.

Now we need to create a 2D array from this list of lists. (Also known as a ranked two array)

Python Program to create 2D array in NumPy

Output:

If you wish you can also read:

• How to make a flat list out of list of lists in Python
• How to print each item from a Python list?

Explanation of the program:

At first, we have imported NumPy library by the below line of code:

You can write anything instead of np. But writing np is globally accepted term. Thus it will be a good practice for us to write np instead of something else.

Then you can see we have taken a list, codespeedy_list

We also provided some elements in it. This type of lists is also known as a list of lists. Because in our list we have 3 lists.

We have used a list of lists because our main goal is to create a 2d array. If you want to create a 3d array then you can put another list in every list of our list. Just like below: