Python Array – Write to File

Write Python Array to File

In Python, you can write the data in array to a file, using tofile() method of array instance.

In this tutorial, you will learn how to write a given Python array to a file, with examples.

To write a Python array to a file, open file in write binary mode, and pass the file object as argument to the tofile() method.

In the following code snippet, we write the array my_array to my_file.txt.

with open('my_file.txt', 'wb') as file:
    my_array.tofile(file)

You may change the file name as per your requirement.

1. Write given Integer Array to a File

In the following program, we take an integer array my_array with some initial values, and then write the contents of this array to a file using tofile() method.

import array as arr

my_array = arr.array('i', [10, 15, 20, 25, 30, 35])

with open('my_file.txt', 'wb') as file:
    my_array.tofile(file)

Summary

In this Python Array tutorial, we learned how to write the contents of a given Python Array to a file, using tofile() method, with examples.