ModuleNotFoundError: No module named 'cx_Oracle' in Python

"ModuleNotFoundError: No module named 'cx_Oracle' in Python" #

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

Open your terminal in your project's root directory and install the cx_Oracle module.

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

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

# 👇️ if you get permissions error
sudo pip3 install cx_Oracle
pip install cx_Oracle --user

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

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

# 👇️ using py alias (Windows)
py -m pip install cx_Oracle

# 👇️ for Anaconda
conda install -c anaconda cx_oracle

# 👇️ for Jupyter Notebook
!pip install cx_Oracle

After you install the cx_Oracle package, try importing it like:

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import cx_Oracle

print(dir(cx_Oracle))

The Python error "ModuleNotFoundError: No module named 'cx_Oracle'" occurs for multiple reasons:

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

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python --version

For example, my Python version is 3.10.4, so I would install the cx_Oracle package with pip3.10 install cx_Oracle.

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pip3.10 install cx_Oracle

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

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:

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

If the "No module named 'cx_Oracle'" error persists, try restarting your IDE and development server/script.

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

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# 👇️ check if you have cx_Oracle installed
pip3 show cx_Oracle

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

The pip show cx_Oracle 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.

For example, In VSCode, you can press CTRL + Shift + P or (⌘ + Shift + P on Mac) to open the command palette.

Then type "Python select interpreter" in the field.

Then select the correct python version from the dropdown menu.

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

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

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# 👇️ 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 cx_Oracle in virtual environment
pip install cx_Oracle

If the python3 -m venv venv command doesn't work, try the following 2 commands:

• python -m venv venv
• py -m venv venv

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

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

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

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# 👇️ check if you have cx_Oracle installed
pip3 show cx_Oracle

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

# 👇️ uninstall cx_Oracle
pip3 uninstall cx_Oracle

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

# 👇️ install cx_Oracle
pip3 install cx_Oracle

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

Try restarting your IDE and development server/script.

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

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pip3 install cx_Oracle --upgrade

# 👇️ if you don't have pip set up in PATH
python3 -m pip install cx_Oracle --upgrade

This one is for using virtual environments (VENV) on Windows:

This one is for using virtual environments (VENV) on MacOS and Linux:

Conclusion #

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