Lean CLI 1.0.196 Error: Please make sure Docker is installed and running

Hi Shaohua,

The error message you're seeing is typically displayed when the Lean CLI is unable to communicate with Docker. This could be because Docker is not installed, not running, or there's an issue with the Docker installation.

Here are a few steps you can take to troubleshoot this issue:

1. Ensure Docker is installed: Docker is required to run the LEAN engine locally. If you haven't installed Docker, you can follow the instructions in the Installing Lean CLI guide.

2. Check if Docker is running: If Docker is installed but not running, you'll need to start it. The method to do this varies depending on your operating system. On Windows, you can start Docker Desktop from the Start menu.

3. Update Lean CLI: Make sure you're using the latest version of the Lean CLI. You can update it by running pip install --upgrade lean in your terminal.

4. Check your Python installation: The Lean CLI requires Python, and it's recommended to use the Anaconda distribution. The Python distribution from the Microsoft Store is not supported.

If you've checked all of these and you're still seeing the error, it would be helpful to see the full output when you run the Lean CLI command with the --verbose flag, like so: lean backtest "YourAlgorithm" --verbose. This will provide more detailed information that can help identify the issue.

If the problem persists, please provide the verbose output and any additional details about your setup (like your operating system and how you installed Docker and Python) so we can assist you further.

Hi all,

The problem is due to python package Requests:

Lean CLI is not compatible with version 2.32 

Hi Shaohua,

The Lean CLI is designed to work with a wide range of Python packages and versions. However, it's possible that a specific version of a package might cause compatibility issues.

If you're having trouble with the Requests package version 2.32, you might want to try downgrading to an earlier version to see if that resolves the issue. You can do this using pip, the Python package installer. Here's how you can downgrade the Requests package:

pip install requests==2.31.0

This command will uninstall Requests 2.32 and install version 2.31.0 instead.

If downgrading the Requests package doesn't resolve the issue, it would be helpful to see the exact error message you're getting. This could provide more clues about what's causing the problem.

Remember to always keep your Lean CLI updated to the latest version using pip install --upgrade lean to ensure maximum compatibility and benefit from the latest features and bug fixes.