pyringe is a powerful Python process “syringe” that attaches to a running interpreter and lets you introspect—and even execute code inside—that live process. It blends debugger-style attachment (via gdb/ptrace techniques) with Python-aware helpers so you can inspect threads, frames, locals, and heap objects without restarting the target. This is invaluable for post-mortem diagnosis of production daemons where reproducing a bug in a dev shell is impractical. pyringe can inject arbitrary Python into the target process, enabling on-the-spot logging, state dumps, or gentle patching to keep a system limping along while you gather evidence. It’s also useful for forensic snapshots: enumerate objects of a certain type, find reference cycles, or measure memory pressure without pre-instrumentation. While powerful, it’s designed for careful, auditable use—showing exactly what code runs and where—so teams can regain visibility when black-box processes go sideways.
Features
- Attach to live Python processes and inspect threads/frames
- Evaluate Python code inside the target for ad-hoc diagnostics
- Enumerate and query heap objects to track leaks or cycles
- Extract locals/globals and pretty-print complex structures
- Minimal pre-instrumentation—works on already-running services
- Useful for production triage, forensics, and hard-to-reproduce bugs
Project Samples
