python-debugpy

Debug a remote Python process using debugpy by configuring an attach or wait-for-client workflow. The debugpy server listens for a DAP client connection, letting you inspect state and step through code in restricted environments.

Inspect local variables after a Python exception using post-mortem debugging. This technique drops you into an interactive pdb REPL at the exact point of failure, allowing you to examine the application state immediately after the crash.

Yes, you can use pdb to debug pytest tests step by step. The framework supports pytest integration, allowing you to insert breakpoint() statements directly into test functions to pause execution and inspect variables.

Python remote debugging with debugpy works on both macOS and Linux. You need a Python environment with both pdb and debugpy installed to support attach, wait-for-client, source-edit, and no-source-launch workflows.

Pdb provides interactive local REPL debugging limited to the current process, while debugpy enables remote debugging and DAP-based workflows. Debugpy gives you attach and listen capabilities for long-running processes that pdb cannot reach.

Start debugging a Python script under pdb by inserting the breakpoint() function at the suspect line and running the script. Execution pauses at the breakpoint, dropping you into an interactive prompt to inspect state.