CPython

Attach pdb to Running Python Processes in Python 3.14

A Python service can misbehave without crashing. A worker may loop unexpectedly, a request may remain in an odd state, or a long-running process may hold data that is difficult to reproduce in a development environment. Historically, using pdb in that situation usually required planning ahead. You could add breakpoint() to the code, start the program under the debugger, or restart it with extra instrumentation. Those approaches are useful, but they do not help much when the interesting state already exists inside a running process.