1. Python Errors

modulenotfounderror no module named ‘pycodestyle’

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

how to fix modulenotfounderror no module named ‘pycodestyle’

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

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

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

# 👇️ if you get permissions error
sudo pip3 install pycodestyle

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

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

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

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

  1. Not having the pycodestyle package installed by running pip install pycodestyle.
  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 pycodestyle.py which would shadow the official module.
  6. Declaring a variable named pycodestyle 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 pycodestyle package with pip3.10 install pycodestyle

pip3.10 install pycodestyle

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

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 pycodestyle

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

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

# 👇️ check if you have pycodestyle installed
pip3 show pycodestyle

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

The pip show pycodestyle 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 pycodestyle 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 pycodestyle in virtual environment
pip install pycodestyle

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 pycodestyle.py because that would shadow the original pycodestyle module.

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

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

# 👇️ check if you have pycodestyle installed
pip3 show pycodestyle

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

# 👇️ uninstall pycodestyle
pip3 uninstall pycodestyle

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

# 👇️ install pycodestyle
pip3 install pycodestyle

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

Try restarting your IDE and development server/script.

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

pip3 install pycodestyle –upgrade

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

Conclusion

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

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