Remote Debugging in Python

2024-07-10

1 minute read

A robust debugger is indispensable for any serious development environment. When it comes to Python projects, having the ability to utilize a remote debugger can significantly enhance troubleshooting capabilities, especially in asynchronous applications.

PuDB

One standout option for Python developers is PuDB, a feature-rich debugger that includes native support for remote debugging.

PuDB screenshot Screenshot of the PuDB “Dark Theme”: https://documen.tician.de/pudb/

How to use remote debugging with PuDB

Enabling remote debugging with PuDB is straightforward. Follow these steps:

Import the set_trace() method:

In your Python code, import the set_trace() function from pudb.remote:
```
1from pudb.remote import set_trace; set_trace()
```
This function call creates a breakpoint in your code that triggers the debugger when reached.
Connecting to the debugger:

Once your code hits the breakpoint, you can connect to the debugger via a telnet connection. The debugger will output the port number you should use. For example:
```
1telnet 127.0.0.1 6899  # Replace 6899 with the actual port number shown in your debugger output
```
This telnet connection establishes communication with the running debugger, allowing you to inspect variables, step through code, and diagnose issues remotely.

Remote debugging with PuDB provides a powerful toolset for Python developers working on complex applications, enabling efficient troubleshooting without needing to interrupt or modify the running application excessively.