Modulenotfounderror: no module named ‘flask._compat’

This article will solve the “modulenotfounderror: no module named ‘flask._compat'” error message.

That you encounter when working on your Flask project, especially when you are new to using Python.

Fortunately, we gather all the steps and solutions to troubleshoot the issue and fix the problem.

We will also discuss what is ‘flask._compat’ and the reasons behind this error.

Stick to this article because we will show you how to fix the error “modulenotfounderror: no module named ‘flask._compat’.”

What is ‘flask._compat’?

“Flask._compat‘ is a module that provides compatibility utilities to support various versions of Python.

It has a collection of classes, functions, and constants that enable Flask to function across different versions of Python without breaking backward compatibility.

In addition to that, ‘Flask._compat’ helps Flask developers write code that works continuously across various Python versions.

It contains code that finds the current Python version. It provides compatibility functions for features that may have changed between various Python versions.

Examples of its features include file operations, module imports, and string handling.

The Modulenotfounderror: no module named ‘flask._compat’ error reasons behind

This error appears when you are trying to import a module named “_compat” from the “flask” package in your Python program.

However, the module couldn’t be found, and aside from that, it happens when the Flask package is not installed or if there is a problem with the installation.

Furthermore, the modulenotfounderror: no module named ‘flask._compat’ error occurs because of various reasons such as:

  • An outdated version of the flask.
  • Corrupted or lost compatibility module.
  • Erroneous installation of the flask.
  • Conflict with other Python packages.
  • Forget to install the Flask module before importing it.

How to solve the Modulenotfounderror: no module named ‘flask._compat’ error?

The first thing you need to do is open the CMD, or Command Prompt, and then execute the following instructions:

Time needed: 2 minutes.

There are various ways to solve the Modulenotfounderror: no module named ‘flask._compat’ error. Here’s a list of the most useful and effective solutions:

  1. Reinstall Flask

    Reinstall Flask if some of the solutions do not work.

    To uninstall:
    pip uninstall Flask

    To reinstall:
    pip install Flask

  2. Upgrade Flask

    If you have an outdated version of Flask, it can also cause a modulenotfounderror: no module named ‘flask._compat’ error.

    To solve this problem, you should try to upgrade your Flask to its latest version.
    You can use pip to upgrade Flask.

    pip install –upgrade Flask
    python.exe -m pip install –upgrade pip

  3. Check for conflicting packages

    A conflict with other Python packages can cause the modulenotfounderror: no module named ‘flask._compat’ error.

    To check for conflicting packages, you can use pip:
    pip list –local

  4. Check for missing dependencies

    Oftentimes, the modulenotfounderror: no module named ‘flask._compat’ error can occur due to missing dependencies.

    To check for missing dependencies, you can use pip:
    pip check

  5. Install the _compat module (manually

    When the above solutions doesn’t work, you can install the _compat module manually.

    You can download the _compat module from the Flask GitHub repository and install it manually.

Upgrading and installing the flask package via Conda or Pip

1. For virtual environment or using Python 2

You can use, pip install Flask

2. For python 3

You can use, pip3 install Flask or python3 -m pip install Flask

3. When you get permissions error

You can use, sudo pip3 install Flask or pip install Flask –user

4. if you don’t have pip in your PATH environment variable

You can use, python -m pip install Flask

5. For using py alias (Windows)

You can use, py -m pip install Flask

6. For Anaconda

You can use, conda install -c anaconda flask

7. For Jupyter Notebook

You can use, !pip install Flask


This article provides various solutions on how to fix errors about “modulenotfounderror: no module named ‘flask._compat’.

That will help you solve your problem right away. Aside from that, you also discover the reasons why the errors occur.

We are hoping that the solution we provide will totally help you fix the error on no module named ‘flask._compat’.

Thank you very much for continuing to read until the end of this article.

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