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Python Debugger

The module pdb defines an interactive source code debugger for Python programs. It supports setting (conditional) breakpoints and single stepping at the source line level, inspection of stack frames, source code listing, and evaluation of arbitrary Python code in the context of any stack frame. It also supports post-mortem debugging and can be called under program control.

The debugger is extensible – it is actually defined as the class Pdb. This is currently undocumented but easily understood by reading the source. The extension interface uses the modules bdb and cmd.

How to use

test.py 파일을 디버깅 하고 싶다면 아래와 같이 실행하면 된다. 

$ opy -m pdb test.py

중단점을 코드에서 넣고싶다면: 

pdb.set_trace()

Example

The debugger’s prompt is (Pdb). Typical usage to run a program under control of the debugger is: 

>>> import pdb
>>> import mymodule
>>> pdb.run('mymodule.test()')
> <string>(0)?()
(Pdb) continue
> <string>(1)?()
(Pdb) continue
NameError: 'spam'
> <string>(1)?()
(Pdb)

Stacktrace

명령 사용: 

(Pdb) where

Python:traceback 사용: 

import traceback
traceback.print_stack()

Python:inspect 사용: 

import inspect
print inspect.stack()

Syntaxhighlight

Take a look at pdb++ - it is a drop-in replacement for pdb that fills all your requirements and adds some other nice features such as tab completion and new commands such as watch and sticky.

Here is a sample config file that will enable colours (add this after creating the file: touch ~/.pdbrc.py): 

import pdb

class Config(pdb.DefaultConfig):
    use_pygments = True
    pygments_formatter_class = "pygments.formatters.TerminalTrueColorFormatter"
    pygments_formatter_kwargs = {"style": "monokai"}

See also

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