python-debugpy

Debugging a Python program interactively lets you pause execution with breakpoints to inspect state when tracebacks are unclear. You can use pdb commands to step through logic, inspect locals, and identify the exact variables causing the bug.

Remote debugging with debugpy lets you attach to long-running or headless Python processes via DAP without restarting the failing service. You connect a DAP client to the running process to inspect state and troubleshoot issues live.

Debugging pytest failures interactively is supported, including guidance on avoiding common pitfalls like xdist interactions. You can step through test logic using pdb breakpoints to inspect variables and understand why specific test assertions fail.

Python post-mortem debugging lets you inspect exceptions interactively after a crash using pdb.post_mortem. This drops you into the debugger at the exact failure point so you can examine the stack frames and local variables that led to the error.

Python debugging via pdb and debugpy supports both local interactive execution and remote headless environments. You use breakpoint() and pdb for local inspection, while debugpy enables DAP remote attach for long-lived services across different deployment contexts.