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:

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arr = [1, 2, 3, 4, 5, 6, 7, 8, 9, 10] |

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:

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sub_array_length = 3 |

### 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:

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num_sub_arrays = len(arr) // sub_array_length |

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:

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sub_arrays = [] for i in range(num_sub_arrays): start = i * sub_array_length end = start + sub_array_length sub_arrays.append(arr[start:end]) |

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:

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for i, sub_array in enumerate(sub_arrays): print(f"Sub-array {i+1}: {sub_array}") |

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:

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arr = [1, 2, 3, 4, 5, 6, 7, 8, 9, 10] sub_array_length = 3 num_sub_arrays = len(arr) // sub_array_length sub_arrays = [] for i in range(num_sub_arrays): start = i * sub_array_length end = start + sub_array_length sub_arrays.append(arr[start:end]) for i, sub_array in enumerate(sub_arrays): print(f"Sub-array {i+1}: {sub_array}") |