In Python, an array can be subdivided into smaller sub-arrays, which can come in handy when working with larger datasets. This tutorial will show you how to divide an array into sub-arrays in Python.

First, let’s define an array:

In this case, arr is an array with 10 elements.

Now let’s say we want to divide this array into three sub-arrays, each containing three elements. Here’s how we can do it:

Step 1: Determine the length of each sub-array

In this case, we want our sub-arrays to have a length of 3. We can assign this value to a variable:

Step 2: Determine the number of sub-arrays needed

To divide the main array into sub-arrays of equal length, we first need to determine how many sub-arrays we need. We can do this by dividing the length of the main array by the length of each sub-array:

In this case, num_sub_arrays will be 3.

Step 3: Divide the array into sub-arrays

To divide the array into sub-arrays, we can use a loop to iterate over the main array and create a new sub-array at each step. Here’s an example of how we can do it:

Let’s go through what’s happening in the loop.

The start variable is the starting index of each sub-array. For the first sub-array, start is 0, for the second sub-array it is 3 and for the third sub-array it is 6.

The end variable is the ending index of each sub-array. For the first sub-array, end is 3, for the second sub-array it is 6 and for the third sub-array it is 9.

sub_arrays.append(arr[start:end]) appends the sub-array created by the slice arr[start:end] to the sub_arrays list.

Step 4: Print the sub-arrays

Let’s print out the sub-arrays to confirm the code is working as expected:

This will output:

Sub-array 1: [1, 2, 3]
Sub-array 2: [4, 5, 6]
Sub-array 3: [7, 8, 9]

And that’s it! You should now be able to divide an array into sub-arrays in Python.

As always, additional documentation can be found in the Python documentation.

Full code: