NoPdb: Non-interactive Python Debugger

Introduction

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

Note

NoPdb should run at least under CPython and PyPy. Most features should work under any implementation as long as it has sys.settrace().

Contents

• Getting Started
  • Capturing function calls
  • Setting breakpoints
  • The NoPdb class
• API Reference