1. Python Errors

modulenotfounderror no module named ‘cssutils’

cssutils is a python package to parse and build CSS cascading style sheets. Currently a DOM only solution and it doesn’t have rendering options.

The Python ModuleNotFoundError: No module named ‘cssutils’ occurs when we forget to install the cssutils module before importing it or installed it in an incorrect environment. To solve the error, install the module by running the pip install cssutils command.

how to fix modulenotfounderror no module named cssutils

Open your terminal in your project’s root directory and install the cssutils module.

# 👇️ in a virtual environment or using Python 2
pip install cssutils

# 👇️ for python 3 (could also be pip3.10 depending on your version)
pip3 install cssutils

# 👇️ if you get permissions error
sudo pip3 install cssutils

# 👇️ if you don’t have pip in your PATH environment variable
python -m pip install cssutils

# 👇️ for python 3 (could also be pip3.10 depending on your version)
python3 -m pip install cssutils

# 👇️ for Anaconda
conda install -c conda-forge cssutils

The Python error “ModuleNotFoundError: No module named cssutils” occurs for multiple reasons:

  1. Not having the cssutils package installed by running pip install cssutils.
  2. Installing the package in a different Python version than the one you’re using.
  3. Installing the package globally and not in your virtual environment.
  4. Your IDE running an incorrect version of Python.
  5. Naming your module cssutils.py which would shadow the official module.
  6. Declaring a variable named cssutils which would shadow the imported variable.

If the error persists, get your Python version and make sure you are installing the package using the correct Python version.

# 👇️ Checking version of python
python –version

For example, my Python version is 3.10.4

So I would install the cssutils package with pip3.10 install cssutils

pip3.10 install cssutils

# 👇️ if you get permissions error use pip3 (NOT pip3.X)
sudo pip3 install cssutils

Notice that the version number corresponds to the version of pip I’m using.

If the PATH for pip is not set up on your machine, replace pip with python3 -m pip.

# 👇️ make sure to use your version of Python, e.g. 3.10
python3 -m pip install cssutils

If the “No module named cssutils” error persists, try restarting your IDE and development server / script.

You can check if you have the cssutils package installed by running the pip show cssutils command.

# 👇️ check if you have cssutils installed
pip3 show cssutils

# 👇️ if you don’t have pip setup in PATH
python3 -m pip show cssutils

The pip show cssutils command will either state that the package is not installed or show a bunch of information about the package, including the location where the package is installed.

If the package is not installed, make sure your IDE is using the correct version of Python.

If you are using a virtual environment, make sure you are installing cssutils in your virtual environment and not globally.

You can try creating a virtual environment if you don’t already have one.

# 👇️ use correct version of Python when creating VENV
python3 -m venv venv

# 👇️ activate on Unix or MacOS
source venv/bin/activate

# 👇️ activate on Windows (cmd.exe)
venv\Scripts\activate.bat

# 👇️ activate on Windows (PowerShell)
venv\Scripts\Activate.ps1

# 👇️ install cssutils in virtual environment
pip install cssutils

Your virtual environment will use the version of Python that was used to create it.

If the error persists, make sure you haven’t named a module in your project as cssutils.py because that would shadow the original cssutils module.

You also shouldn’t be declaring a variable named cssutils as that would also shadow the original module.

If the error is not resolved, try to uninstall the cssutils package and then install it.

# 👇️ check if you have cssutils installed
pip3 show cssutils

# 👇️ if you don’t have pip set up in PATH
python3 -m pip show cssutils

# 👇️ uninstall cssutils
pip3 uninstall cssutils

# 👇️ if you don’t have pip set up in PATH
python3 -m pip uninstall cssutils

# 👇️ install cssutils
pip3 install cssutils

# 👇️ if you don’t have pip set up in PATH
python3 -m pip install cssutils

Try restarting your IDE and development server/script.

You can also try to upgrade the version of the cssutils package.

pip3 install cssutils –upgrade

# 👇️ if you don’t have pip set up in PATH
python3 -m pip install cssutils –upgrade

Conclusion

The Python “ModuleNotFoundError: No module named cssutils” occurs when we forget to install the cssutils module before importing it or install it in an incorrect environment. To solve the error, install the module by running the pip install cssutils command.

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