How to use pdb to debug components

[atb00ker]

Hi,

I am trying out langflow and I started creating a custom component,
but the output of the component is not as I expect it to be, so I want to add import pdb; pdb.set_trace() and check the output and run line by line to understand where the error is occuring.
However, it seems langflow server cannot take input and hence bdb.BdbQuit happens.
I've even tried setting LANGFLOW_DEV=true but no luck.

Is there a way to run pdb?
Is there any other recommended way to debug when using langflow?

[dosubot[bot]]

Hello @atb00ker 👋, I'm here to assist you with any issues or questions you have. Let's work together to solve this puzzle!

Using pdb for debugging in Langflow can be challenging due to the server's inability to handle standard input, which leads to the bdb.BdbQuit error. Instead, it is recommended to use the .vscode/launch.json file for debugging in VSCode. This method is faster and more effective than using pdb in this context.

The launch.json file provides several configurations for different debugging scenarios, such as:

• Debug Backend: Launches the backend using uvicorn with options for reloading and setting the log level to debug.
• Debug CLI: Runs the Langflow CLI, allowing you to debug command-line interactions.
• Python: Remote Attach: Allows attaching to a remote Python process.
• Debug Frontend: Launches the frontend in Chrome for UI debugging.
• Python: Debug Tests: Debugs Python tests in the integrated terminal.

These configurations allow you to set breakpoints, inspect variables, and step through code, providing a comprehensive debugging environment tailored for Langflow development ^[1][2].

To continue talking to Dosu, mention @dosu.

---

^{Help Dosu learn! Give it feedback: Great Response | Irrelevant Answer | Incorrect Sources | Too Verbose | Hallucination | Bug Report | Other}

[atb00ker]

The linked launch.json seems relevant for someone who is working on langflow.
I am developing an application using langflow as a dependency.