Automate File Conversion: Convert JPG to PNG and PNG to JPG Using Python

File Conversion in Python: A Comprehensive Guide

In the world of programming, data processing is an essential part of any project. One of the most common tasks is file conversion. Imagine you have a lot of files in JPG format, but you need to use PNG files instead. Would you spend the whole day converting them manually or would you use Python to automate the process? In this article, we will explore how to convert JPG to PNG using Python.

Installing the PIL Package:

To start, we need to install the required package, which is called Pillow. Pillow is a fork of the Python Imaging Library (PIL), which is no longer maintained.

To install it, we need to open the command prompt and type the following command:

pip install Pillow

This will download and install the Pillow package, which we will use to convert the JPG files to PNG.

Capturing the Path where the JPG is Stored:

Next, we need to tell Python where the JPG file is located on our computer. We can do this by specifying the path to the file. To capture the path, we can use the following code:

from PIL import Image
img = Image.open(r'C:UsersUsernameDesktopautumn.jpg')

In this code, we are importing the Image module from the Pillow package. Then, we are using the open() function to open the ‘autumn.jpg’ file located in the specified path.

Converting the JPG to PNG using Python:

Now that we have the JPG file path, we can proceed to convert it to PNG using the following Python code:

img.save(r'C:UsersUsernameDesktopnew_autumn.png')

This code saves the converted file as ‘new_autumn.png’. You can change the file name and file path to your preferred name and location.

Example:

To put everything together, let’s take the example of converting ‘autumn.jpg’ to ‘new_autumn.png’.

from PIL import Image
img = Image.open(r'C:UsersUsernameDesktopautumn.jpg')
img.save(r'C:UsersUsernameDesktopnew_autumn.png')

This code will open the ‘autumn.jpg’ file, convert it to PNG, and save it as ‘new_autumn.png’ in the specified path.

Conclusion:

In this article, we have explored how to convert JPG to PNG using Python. We installed the required package, captured the path where the JPG file is stored, and used Python code to convert the file to PNG. This is a simple yet powerful way to automate file conversion and can save a lot of time when dealing with large files.

Converting PNG to JPG using Python

In programming, we often work with different file formats, and sometimes, we need to convert them. In the previous section, we saw how to convert JPG files to PNG files using Python. In this section, we will look at how to convert PNG files to JPG files using Python.

Installing the PIL Package

Before we proceed with the conversion process, we need to install the Python Imaging Library (PIL) package, just like in the previous section. We can do this by opening the command prompt and typing the following command:

pip install Pillow

This command will download and install the Pillow package, which we will use for the PNG to JPG conversion process.

Capturing the Path where the PNG is Stored

Once we have installed the necessary package, we need to specify the path to the PNG file that needs to be converted. We can capture the path by using the following Python code:

from PIL import Image
img = Image.open(r'C:UsersUsernameDesktopsummer.png')

In this code, we are importing the Image module from the Pillow package. Then, we are using the open() function to open the ‘summer.png’ file located in the specified path.

Converting the PNG to JPG using Python

Now that we have the PNG file path, we can proceed to convert it to JPG using the following Python code:

rgb_img = Image.new("RGB", img.size)
rgb_img.paste(img)
rgb_img.save(r'C:UsersUsernameDesktopnew_summer.jpg')

In this code, we are creating a new RGB image with the same size as the original PNG image. Then, we are using the paste() function to paste the PNG image onto the RGB image. Finally, we are saving the new JPG image as ‘new_summer.jpg’ in the specified path.

Example

Here’s an example of converting ‘summer.png’ to ‘new_summer.jpg’:

from PIL import Image
img = Image.open(r'C:UsersUsernameDesktopsummer.png')
rgb_img = Image.new("RGB", img.size)
rgb_img.paste(img)
rgb_img.save(r'C:UsersUsernameDesktopnew_summer.jpg')

This code will open the ‘summer.png’ file, convert it to JPG, and save it as ‘new_summer.jpg’ in the specified path.

Conclusion

In this section, we have seen how to convert PNG files to JPG files using Python. We installed the necessary package, captured the path where the PNG file is stored, and used Python code to convert the file to JPG. This is a very useful technique especially when dealing with images because sometimes some applications only support one specific file format. Now that we know how to convert files easily using Python, we can save lots of time and make our workflow more efficient.

In Conclusion:

We have explored how to convert image files using Python. We have seen how to convert JPG files to PNG files and how to convert PNG files to JPG files. To convert any file, we first need to install the Python Imaging Library (PIL) package. We then need to specify the path to the file and use Python code to convert it to the desired format. Automating file conversion tasks can save time and increase efficiency, making it an essential skill for programmers. By using Python, we can simplify this task, and with the knowledge gained in this article, we can now convert files easily using Python code.