Python 3 Automation Script to Rename All Files in Directory With a Custom Pattern Name in OS Module

Welcome folks today in this blog post we will be writing the python script to automatically rename all the files present inside the directory with a custom pattern name using the os module. All the full source code of the application is shown below.

Get Started

In order to get started you need to make an app.py file and copy paste the following code

app.py

import os

# specify the directory path
directory_path = "images"

# specify the custom pattern for file names
file_name_pattern = "file_"

# get a list of all files in the directory
files = os.listdir(directory_path)

# loop through each file
for index, file in enumerate(files):
    # get the absolute path of the file
    file_path = os.path.join(directory_path, file)
    # check if the file is a file (not a directory)
    if os.path.isfile(file_path):
        # get the file extension
        file_extension = os.path.splitext(file)[1]
        # construct the new file name using the custom pattern and file extension
        new_file_name = file_name_pattern + str(index) + file_extension
        # construct the absolute path of the new file name
        new_file_path = os.path.join(directory_path, new_file_name)
        # rename the file
        os.rename(file_path, new_file_path)

import os

# specify the directory path

directory_path = "images"

# specify the custom pattern for file names

file_name_pattern = "file_"

# get a list of all files in the directory

files = os.listdir(directory_path)

# loop through each file

for index, file in enumerate(files):

# get the absolute path of the file

file_path = os.path.join(directory_path, file)

# check if the file is a file (not a directory)

if os.path.isfile(file_path):

# get the file extension

file_extension = os.path.splitext(file)[1]

# construct the new file name using the custom pattern and file extension

new_file_name = file_name_pattern + str(index) + file_extension

# construct the absolute path of the new file name

new_file_path = os.path.join(directory_path, new_file_name)

# rename the file

os.rename(file_path, new_file_path)

As you can see in the above code you need to replace the path of the directory where all the files are present and then it will loop through all the files with different extensions as well and it will rename the files with the provided pattern in the above code. You can edit the pattern according to your choice. Now you need to create the images folder and store the files as shown below