No module named selenium ошибка

Python shows no module named selenium error when it can’t find the selenium library you imported in your code.

This can mean that you don’t have selenium installed, or you installed it for a different version of Python (if you have multiple Python versions)

This article shows simple steps you can do to fix this error.

Why no module named selenium error occurs

This error occurs when you try to import the selenium library in your code like this:

import selenium
#or
from selenium import webdriver

When Python can’t find the library, it raises the following error:

Traceback (most recent call last):
  File ...
    import selenium
ModuleNotFoundError: No module named 'selenium'

Because selenium isn’t a standard Python library, you need to install it using pip before you can import it.

Here’s the command to install selenium with pip:

pip install selenium

# or if you have Python 3
pip3 install selenium

Once you have selenium library installed, you should be able to run the code without any errors.

If that doesn’t work, then you may have installed multiple versions of Python on your computer.

One of the following scenarios may happen in your case:

1. You have multiple versions of Python installed on your system, and you are using a different version of Python than the one where selenium is installed.
2. You might have selenium installed in a virtual environment, and you are not activating the virtual environment before running your code.
3. Your IDE uses a different version of Python from the one that has selenium installed

Let’s see how to fix these errors.

Case#1 — You have multiple versions of Python

If you have multiple versions of Python installed on your system, you need to make sure that you are using the specific version where the selenium package is installed.

You can test this by running the which -a python or which -a python3 command from the terminal:

$ which -a python
/opt/homebrew/bin/python
/usr/bin/python

In the example above, there are two versions of Python installed on /opt/homebrew/bin/python and /usr/bin/python.

Suppose you run the following steps in your project:

1. Install selenium with pip using /usr/bin/ Python version
2. Install Python using Homebrew, now you have Python in /opt/homebrew/
3. Then add import selenium in your code

The steps above will cause the error because selenium is installed in /usr/bin/, and your code is probably executed using Python from /opt/homebrew/ path.

To solve this error, you need to run pip install selenium command again so that the package is installed and accessible by the new Python version.

Finally, keep in mind that you can also have pip and pip3 available on your computer.

These days, the pip command is used to install modules for Python 2, while pip3 installs for Python 3. Make sure that you are using the right command for your situation.

Next, you can also have the package installed in a virtual environment.

Case#2 — You are using Python virtual environment

Python venv package allows you to create a virtual environment where you can install different versions of packages required by your project.

If you are installing selenium inside a virtual environment, then the module won’t be accessible outside of that environment.

Even when you never run the venv package, Python IDE like Anaconda and PyCharm usually create their own virtual environment when you create a Python project with them.

You can see if a virtual environment is activated or not by looking at your command prompt.

When a virtual environment is activated, the name of that environment will be shown inside parentheses as shown below:

In the picture above, the name of the virtual environment (base) appears when the Conda virtual environment is activated.

To solve this, you can either:

1. Turn off the virtual environment so that pip installs to your computer
2. Install the selenium in the virtual environment with pip

You can choose the solution that works for your project.

When your virtual environment is created by Conda, run the conda deactivate command. Otherwise, running the deactivate command should work.

To activate your virtual environment, use one of the following commands:

# For Conda:
conda activate <env_name>

# For venv:
source <env_name>/bin/activate

For Pycharm, you need to follow the Pycharm guide to virtual environment.

Case#3 — IDE using a different Python version

Finally, the IDE from where you run your Python code may use a different Python version when you have multiple versions installed.

If you use VSCode, run the steps below to check available Python interpreters:

1. Open the command palette (CTRL + Shift + P for Windows and ⌘ + Shift + P for Mac)
2. Run the Python: Select Interpreter command.

You should see all available Python versions listed as follows:

You need to use the same version where you installed selenium so that the module can be found when you run the code from VSCode.

If you use Pycharm, follow the Pycharm configuring Python interpreter guide.

Once done, the import selenium statement shouldn’t cause any error.

Conclusion

To conclude, the ModuleNotFoundError: No module named 'selenium' error occurs when the selenium package is not available in your Python environment.

To fix this error, you need to install selenium using pip.

If you already have the module installed, make sure you are using the correct version of Python, activate the virtual environment if you have one, and check for the Python version used by your IDE.

By following these steps, you should be able to import selenium modules without any error.