NoPdb: Non-interactive Python Debugger
By O. Cífka

NoPdb is a programmatic (non-interactive) debugger for Python. This means it gives you access to debugger-like superpowers directly from your code. With NoPdb, you can:

• capture function calls, including arguments, local variables, return values and stack traces
• set “breakpoints” that trigger user-defined actions when hit, namely:
  • evaluate expressions to retrieve their values later
  • execute arbitrary code, including modifying local variables
  • enter an interactive debugger like pdb

NoPdb is also a convenient tool for inspecting machine learning model internals. For example, this notebook and this post show how to use it to visualize Transformer (ViT) attention in PyTorch.

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• Installation: pip install nopdb
• Github
• Docs
• PyTorch ViT tutorial as a Medium post, blog post and Colab notebook