Modulenotfounderror: no module named psycopg2 [SOLVED]

Modulenotfounderror: no module named psycopg2 [SOLVED]

by

Finding it difficult to resolve the Python problem modulenotfounderror: no module named psycopg2? Don’t worry; we’ll show you how to fix this mistake in this article.

The modulenotfounderror: no module named psycopg2 error is a Python error that is usually encountered by programmers or developers when they attempt to use PostgreSQL in their applications. It not being installed in your system or Python environment is the most frequent cause of this problem.

What is Python?

Python is one of the most popular programming languages. It is used for developing a wide range of applications. It is a high-level programming language that is usually used by developers nowadays due to its flexibility.

Returning to our issue, we must take a few actions to fix this error. So, without further ado, let’s move on to our “how to fix this error” tutorial.

How to solve “no module named psycopg2” in Python

Here’s how to resolve the error message stating modulenotfounderror: no module named psycopg2 in Python.

  1. Verify whether you have pip installed.


    Resolving the error modulenotfounderror: no module named psycopg2 is an easy task. All you have to do is install the psycopg2-binary module.

    But before that, verify if you have pip installed on your system; if not, install it. To verify, input the command pip --version.

    pip --version

    The command pip --version will display the version of pip installed in your system, including its location.

  2. Install the psycopg2-binary module.


    Once it is confirmed that you have pip installed, the next thing you do is install the psycopg2-binary module.

    To install this module, open your cmd or command prompt, then input the command pip install psycopg2-binary.

    pip install psycopg2-binary

    The command pip install psycopg2-binary will download and install the latest version of the psycopg2-binary module.

    Note: If you’re using Python 3, use the command pip3 install psycopg2-binary.

  3. Verify whether it is successfully installed.


    Verify whether the psycopg2-binary module was successfully installed by entering the command import psycopg2. If you don’t receive an error, it means that it was successfully installed.

    Note: You can also verify it using the command pip show psycopg2-binary. This command will display information about the psycopg2-binary module, including its location.

    pip show psycopg2-binary - Modulenotfounderror: no module named psycopg2 [SOLVED]

    If the module’s information was displayed and you did not receive an error that stated “WARNING: Package(s) not found: psycopg2-binary,” it signifies that it was successfully installed.

Installing the psycopg2-binary module on different platforms

Jupyter Notebook:

If you're using Jupyter notebook, use the command !pip install psycopg2-binary.

Anaconda:

If you're using Anaconda, use the command conda install -c conda-forge psycopg2-binary.

Py Alias:

If you're using Py Alias, use the command py -m pip install psycopg2-binary.

How to install psycopg2-binary on macOS or Linux

The following are the steps on how to install psycopg2-binary on macOS or Linux:

→ Search for Terminal and open it.
→ Next, input the command pip install psycopg2-binary, then click the enter key.

Alternative command for macOS: brew install postgresql.

If you get an error saying “pip” isn’t found, use the command python -m. It will look like this: python -m pip install psycopg2-binary. However, if you get a permissions error, use the command sudo pip install psycopg2-binary.

Alternative Solution: Reinstall the module

If the error still exists, try this alternative solution: reinstall the psycopg2-binary module. To do so, follow the steps below.

  1. Uninstall the installed psycopg2-binary module.

    To uninstall the psycopg2-binary module, input the pip uninstall psycopg2-binary command, then press the Enter key.

    After inputting the pip uninstall psycopg2-binary command, results will come out, and this question will also appear (Proceed (Y/n)?). Once that appears, just type Y, then click the Enter key.

    pip uninstall psycopg2-binary

    Tips:

    If you’re using Python 3, use the command pip3 uninstall psycopg2-binary.
    If you’re using Jupyter notebook, use the command !pip uninstall psycopg2-binary --yes.
    If you’re using Anaconda, use the command conda remove psycopg2-binary.
  1. Install the psycopg2-binary module.

    After uninstalling the psycopg2-binary module, install it again. To do so, enter the pip install psycopg2-binary command.

    Kindly check the above commands if you’re using Python 3, Jupyter Notebook, or Anaconda.

Commands you might need

  • pip list

    This command will display all the packages installed on your system, including their versions.

    If you’re using Jupyter Notebook, use the !pip list command instead of pip list. However, if you’re using Anaconda, use the command conda list.
  • python -m

    Include this command in your pip install psycopg2-binary command if you get an error message stating that “pip” cannot be found. (example: python -m pip install psycopg2-binary)

    However, if you’re using Python 3, use the command python3 -m pip install psycopg2-binary instead of python -m pip install psycopg2-binary.
  • pip install --upgrade pip

    Use this command to upgrade the pip package manager to its newest version. If your pip is already in the latest version, this will come out: “Requirement already satisfied.”
  • python --version

    Use this command if you want to check what version of Python you have.
  • pip install --upgrade psycopg2-binary

    Use this command to upgrade your psycopg2-binary module to its latest version. If it is already the latest version, this will come out: “Requirement already satisfied.”

    If you’re using Jupyter notebook, use the command !pip install -U psycopg2-binary.

Conclusion

In conclusion, the error modulenotfounderror: no module named psycopg2 can be easily solved by installing the psycopg2-binary module in your system or Python environment.

By following the guide above, there’s no doubt that you’ll be able to resolve this error quickly.

We hope you’ve learned a lot from this. If you have any questions or suggestions, please leave a comment below, and for more Python tutorials, visit our website.

Thank you for reading!

Leave a Comment