How can I edit Graphite Python source files to debug?

Question

I'm using the Graphite charting library and I'd like to edit the source files to debug a problem.

Specifically, I'd like to edit graphite/webapp/graphite/render/gylph.py drawGraph() function.

But when I change the code and render a chart, which was producing an error in that area of the code, my edited code does not seem to execute.

In fact I can delete that entire file and the pyc file and the code still seems to run.

Answer 1

You can use the built in debugger of python, pdb. Put in the source you want to edit:

import pdb
pdb.set_trace() 

just before the place you want to stop execution and examine the problem.