Using Python to Convert Images to WEBPSee Python: Tips and Tricks for similar articles.
On each of our course pages, we include an image like this one that is meant to represent the course:
The image is in WebP format. This one was converted from the following png file:
The WebP file (4 KB) is nine times smaller than the png file (36 KB).
Although Google offers conversion tools for all major operating systems, you can easily roll your own with Python and Pillow. Here’s how:
- Create a webp folder for storing your code.
- Create and activate a virtual environment.
- Install Pillow with pip:
pip install Pillow
- Create a subfolder within the webp folder called images and put some png files in there. You can download these images if you don’t have any handy.
- Create a convert.py file within the webp folder. This is where you’ll write the code.
Our function will take a source
from pathlib import Path
Pathto the png file and return a destination
Pathto the WebP file.
This is what we will use to do the conversion.
from PIL import Image
- Write the
def convert_to_webp(source): """Convert image to WebP. Args: source (pathlib.Path): Path to source image Returns: pathlib.Path: path to new image """ destination = source.with_suffix(".webp") image = Image.open(source) # Open image image.save(destination, format="webp") # Convert image to webp return destination
with_suffix()method of a
Pathobject replaces the current suffix with a new suffix.
- The conversion process is just two steps:
- Open the image with
Image.open()passing in the source.
- Save the image with
Image.save()passing in the destination and the format.
- Open the image with
That’s all there is to it. You can call the function like this:
The complete code is shown below along with a
main()function for converting all the images in the images folder:
from pathlib import Path from PIL import Image def convert_to_webp(source): """Convert image to webp. Args: source (pathlib.Path): Path to source image Returns: pathlib.Path: path to new image """ destination = source.with_suffix(".webp") image = Image.open(source) # Open image image.save(destination, format="webp") # Convert image to webp return destination def main(): paths = Path("images").glob("**/*.png") for path in paths: webp_path = convert_to_webp(path) print(webp_path) main()
Converting to WebP in Django Admin
On our site, we provide a fallback image using code like this, which instructs the browser to use the first supported image type:
<picture> <source srcset="PYT138.webp" type="image/webp"> <source srcset="PYT138.png" type="image/png"> <img src="PYT138.png" alt="Introduction to Python 3 Training"> </picture>
In Django admin, we only upload the png file and we use code similar to that described above to create a WebP file: The Update WebP link shown in the bottom right of the image uses Ajax to call a view that converts the image.
- Using Python to Convert Images to WEBP (this article)
- Scientific Notation in Python
- Understanding Python’s __main__ variable
- Bulk Convert Python files to IPython Notebook Files (py to ipynb conversion)
- Python Clocks Explained
- Python: isdigit() vs. isdecimal()
- Maximum recursion depth exceeded while calling a Python object
- When to use Static Methods in Python? Never
- Finally, a use case for finally – Python Exception Handling
- Python Coding Challenge: Two People with the Same Birthday
- How to Create a Simple Simulation in Python – Numeric Data
- Collatz Conjecture in Python
- Associate Python Files with IDLE
- How to find all your Python installations on Windows (and Mac)
- Python Color Constants Module
- A Python Model for Ping Pong Matches
- pow(x, y, z) more efficient than x**y % z and other options
- Python’s date.strftime() slower than str(), split, unpack, and concatenate?
- Bi-directional Dictionary in Python
- Creating an Email Decorator with Python and AWS
- Change Default autosave Interval in JupyterLab
- Converting Leading Tabs to Spaces with Python
- Basic Python Programming Exercise: A Penny Doubled Every Day
- Simple Python Script for Extracting Text from an SRT File
- Python Virtual Environments with venv
- Mapping python to Python 3 on Your Mac
- How to Make IDLE the Default Editor for Python Files on Windows
- How to Do Ternary Operator Assignment in Python
- How to Convert Seconds to Years with Python
- How to Create a Python Package
- How to Read a File with Python
- How to Check the Operating System with Python
- How to Use enumerate() to Print a Numbered List in Python
- How to Repeatedly Append to a String in Python
- Checking your Sitemap for Broken Links with Python
- How to do Simultaneous Assignment in Python
- Visual Studio Code - Opening Files with Python open()
- How to Slice Strings in Python
- How Python Finds Imported Modules
- How to Merge Dictionaries in Python
- How to Index Strings in Python
- How to Create a Tuple in Python