Critical: clr-loader & pythonnet Missing in quantconnect/lean Docker Images (foundation/latest) - Python Broken

Here's how you can help 'YW' work around the critical issue with missing clr-loader and pythonnet in the official QuantConnect Lean Docker images:

Quick Workaround for Missing Python Dependencies

You can create your own Docker image extending the official Lean image to restore Python support locally. Below is a Dockerfile snippet:

# Start from the official Lean base image (foundation or latest)
FROM quantconnect/lean:foundation

# Install Python packages required for Python-based Lean development
#       - clr-loader and pythonnet are essential for Python.NET
RUN pip install --no-cache-dir clr-loader pythonnet

# If you need additional Python packages, you can install them here as well:
# RUN pip install --no-cache-dir clr-loader pythonnet other-package

Instructions:

1. Save the above content into a file called Dockerfile.
2. In the same directory, run:
   docker build -t mylean:python .
3. Use mylean:python as your Docker image for local Lean/Python development.

Notes:

• This workaround will restore the missing dependencies (clr-loader and pythonnet), allowing QuantConnect modules to be imported and Python algorithms to run locally.
• If additional Python packages are required, add them to the RUN pip install ... line.
• Always check for any official updates or image tags where this issue is resolved.

If you need further help or want to stay updated on official fixes, consider:

• Searching the Lean GitHub Issues for similar reports or official resolution.
• Trying older versioned tags (e.g., quantconnect/lean:6689, etc.), as sometimes interim/latest/foundation tags may have incomplete builds.

Let me know if you want help drafting a post or raising this as a formal issue with QuantConnect!

Sources: Third-Party Libraries - QuantConnect.com, Autocomplete - QuantConnect.com