PySnooper vs pudb
Python debugging tools compared
PySnooper and pudb help developers investigate Python programs. PySnooper records execution and local-variable changes in selected code, while pudb provides an interactive, full-screen terminal debugger.
PySnooper: Trace Python Functions Without a Full Debugger
PySnooper logs which lines run in a Python function and how its local variables change, using a decorator or context manager. It suits developers who need quick, low-setup insight into code behavior without configuring a full debugger.
pudb: Debug Python in a Visual Terminal Interface
PuDB is a full-screen, console-based visual debugger for Python, designed for keyboard-friendly debugging where you write and test code. It brings source, stack, breakpoints, and variables together in a terminal, with support for Python 3.10 and newer.
| PySnooper | pudb | |
|---|---|---|
| Language | Python | Python |
| License | MIT | — |
| Stars | 16.6k | 3.3k |
| Forks | 964 | 246 |
| Last analyzed | Oct 3, 2026 | Oct 16, 2026 |
Key differences
- PySnooper traces a selected function or block; pudb supports interactive debugging with stepping, breakpoints, and stack frames.
- PySnooper sends trace logs to standard error or a chosen output target; pudb presents source code and program state in a terminal interface.
- PySnooper can watch expressions and increase trace depth to include called functions; pudb includes source search, a module browser, and an interactive shell.
- PySnooper is MIT licensed; pudb's repository is marked NOASSERTION, and its licensing information should be reviewed before reuse.
- PySnooper has 16.6k stars and 964 forks, while pudb has 3.2k stars and 245 forks.
Choose PySnooper if you…
- need a quick trace of a specific function or code block without setting up a full debugger.
- want to record line execution and local-variable changes to a file, stream, or other supported target.
- need to inspect watched expressions or include nested calls in a trace.
Choose pudb if you…
- want an interactive, keyboard-driven debugging workflow in a terminal.
- need to set breakpoints, step through code, and inspect source, variables, and stack frames together.
- want to investigate a crash with post-mortem debugging or inspect modules in the debugger.
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This comparison is generated with AI from the OSRepos analyses of both projects. Always check each project's repository and documentation before choosing.