1. Python Errors

modulenotfounderror no module named ‘xlwt’

xlwt is a library for developers to use to generate spreadsheet files compatible with Microsoft Excel versions 95 to 2003. The package itself is pure Python with no dependencies on modules or packages outside the standard Python distribution.

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

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

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

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

# 👇️ if you get permissions error
sudo pip3 install xlwt

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

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

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

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

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

pip3.10 install xlwt

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

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 xlwt

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

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

# 👇️ check if you have xlwt installed
pip3 show xlwt

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

The pip show xlwt 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 xlwt 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 xlwt in virtual environment
pip install xlwt

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

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

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

# 👇️ check if you have xlwt installed
pip3 show xlwt

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

# 👇️ uninstall xlwt
pip3 uninstall xlwt

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

# 👇️ install xlwt
pip3 install xlwt

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

Try restarting your IDE and development server/script.

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

pip3 install xlwt –upgrade

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

Conclusion

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

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