Modulenotfounderror: no module named ‘bio’

If you’re having a hard time dealing with modulenotfounderror: no module named ‘bio’ error message right now?

Don’t worry! We got your back.

We’ll show you the solution, what this error means, the root causes, and how to troubleshoot the error.

Stay with this article as we are going to give you a step-by-step guide on how you are going to fix the no module named ‘bio’ error.

What is “bio” module?

The “bio” module is used for working with biological data in Python. It provides users with a wide range of tools and utilities for:

  • Analyzing biological data
  • Including DNA and protein sequences
  • Molecular structures
  • and many more.

What is modulenotfounderror: no module named ‘bio’ error?

Modulenotfounderror: No module named 'bio'

The modulenotfounderror: no module named ‘bio’ is an error message in Python.

That is usually what appears when the “biopython” module or package that you’re importing is unable to be found in your system by the Python interpreter.

In order to solve the error, you have to install the “biopython” in your system to run the program smoothly.

What are the causes of modulenotfounderror: no module named ‘bio’ error?

There are several reasons why you may encounter the modulenotfounderror: no module named ‘bio’ error. Here are some of the most common causes:

1. The “biopython” module is not installed.

When the “biopython” module is not installed on your system, definitely you encounter this error no module named ‘bio’ because Python unable to find the required module.

2. The “bio” module is installed but it is in the incorrect location.

When the “biopython” module is installed in the incorrect location, Python cannot find the module. Ensure that the “bio” module is installed in the correct location where it is included in the Python path.

3. Incompatible version.

The Python version you are using is not compatible with the “biopython” module you are importing. Ensure that you are using the correct version of Python for the “bio” module you want to import.

How to fix the modulenotfounderror: no module named ‘bio’ error?

Time needed: 2 minutes

Here are the effective solutions to fix the modulenotfounderror: no module named ‘bio’ error.

Just follow the following command until you have successfully fixed the error.

  1. Install “biopython” module

    When you haven’t installed the “biopython” module, you can install it using the standard package manager.
    Open your command prompt or terminal and execute the following command:

    Python 2:
    pip install biopython

    Python 3:
    pip3 install biopython

    You can use the following command if you are using a different platform:

    Jupyter Notebook
    !pip install biopython

    conda install -c conda-forge biopython

    Py alias (Windows):
    py -m pip install biopython

    When you get permissions error:
    sudo pip3 install biopython
    pip install biopython –user

    When you don’t have pip in your PATH environment variable:
    python -m pip install biopython

  2. Check the Python version

    When the error does not resolve after installing the module, check the Python version you are using and ensure that you are installing the package with the correct Python version.

    python –version

  3. Check the biopython installation

    When you are unsure if you installed the module correctly, you can simply check it using the following command:

    pip show biopython


    pip3 show biopython

    This command will display a list of information about the module, including its location. Ensure that it is located in the Python version you are currently using.

Reinstalling the module

When the above solutions do not resolve the error, you can try to reinstall the module.

To uninstall:

pip3 uninstall biopython

Installing biopython:

pip3 install biopython

Installing the module in a Virtual Environment

When you are using a virtual environment you have to install the module in a Virtual Environment.

You have to ensure you install the module not globally but it should be in the virtual environment you are using.

pip install biopython

If you don’t have virtual environment you can create one using the following command:

Activating virtual environments on Windows (PowerShell)


Windows (cmd.exe)

Unix or MacOS
source venv/bin/activate


In conclusion, this article already provides you with various solutions for the modulenotfounderror: no module named ‘bio’ error message.

By following the provided solutions, we can guarantee that it will resolve the error in no time.

This error no module named ‘bio’ can be resolve by installing the missing module or package.

We also have solutions if you encounter an error like modulenotfounderror: no module named ‘aiohttp’.

Thank you very much for reading until the end of this article.

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