How to Fix Unmet Dependencies Error: python3-tornado Breaks mitmproxy

How to Fix Unmet Dependencies Error: python3-tornado Breaks mitmproxy

If you are encountering an "unmet dependencies" error when trying to install or update mitmproxy on your system, specifically related to the package python3-tornado, this guide will help you resolve the issue. This error typically occurs when there is a conflict between different versions of the required packages. Follow the steps below to fix the problem.

Step 1: Update Package Manager

Before proceeding with the resolution, it's always a good idea to ensure that your package manager is up to date. Open a terminal and run the following command:

sudo apt update

Step 2: Remove Existing Packages

To fix the unmet dependencies error, you need to remove the conflicting packages. In this case, we will remove both mitmproxy and python3-tornado from your system. Execute the following commands in the terminal:

sudo apt remove mitmproxy python3-tornado

Confirm the removal when prompted.

Step 3: Install Dependencies

Now that the conflicting packages are removed, it's time to install the dependencies in the correct order. Start by installing the required version of python3-tornado by running:

sudo apt install python3-tornado=5.1.1-2

Make sure to replace the version number with the specific version mentioned in the unmet dependencies error message.

Next, install mitmproxy using the following command:

sudo apt install mitmproxy

Step 4: Verify Installation

After the installation completes successfully, verify that both mitmproxy and python3-tornado are installed correctly by running the following commands:

mitmproxy --version

python3 -c "import tornado; print(tornado.version)"

If the commands display the respective version numbers without any errors, the installation was successful.

Step 5: Update Packages

To ensure that your system stays up to date, run the following command to update all installed packages:

sudo apt upgrade

This will update any other packages on your system that need to be updated.

That's it! You have successfully resolved the unmet dependencies error related to python3-tornado breaking mitmproxy.

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