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I'm using PDB a lot and it seems it would be even better if I could add systax highlighting in color.
Ideally, I'd like to have to the path to the code a lighter color. The line of actual code would be syntax highlighted.
I'm using OS X and the Terminal app. Python 2.7
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Starting Python Debugger To start debugging within the program just insert import pdb, pdb. set_trace() commands. Run your script normally and execution will stop where we have introduced a breakpoint. So basically we are hard coding a breakpoint on a line below where we call set_trace().
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.
Whenever you want to leave the pdb console, type the command quit or exit . If you would like to explicitly restart a program at any place within the program, you can do so with the command run .
Optionally, you can also tell pdb to break only when a certain condition is true. Use the command b (break) to set a breakpoint. You can specify a line number or a function name where execution is stopped. If filename: is not specified before the line number lineno , then the current source file is used.
pdb doesn't support colorization. However, it's not that hard to get it, even if you're a command-line addict (as I am;-) -- you don't have to switch to GUIs/IDEs just to get colorization while debugging Python. In particular, command-line tools usually work much better when you're accessing a remote machine via SSH, saving a lot of the bandwidth and latency issues that any remote access to GUIs and IDEs can inflict on you;-).
Specifically, for the task you're asking about, consider ipdb (you also need ipython, which offers a far more advanced shell than plain interactive Python, on which ipdb relies). Both offer you good tab completion, enhanced tracebacks, and colorization -- ipython for your normal interactive work, ipdb with the same features when you're debugging (otherwise just about the same as pdb).
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You could try pudb, which works in the terminal and looks like this:
I haven't tried some of the options mentioned in other answers, but to judge from the PyPI pages, pudb is better maintained and better documented.
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