One of the most powerful tools when debugging the Python portions of a ZenPack is the Python debugger (pdb). With pdb you can set breakpoints in your code. When the breakpoints are hit, you get a (pdb) prompt that has full access to examine the stack and any local or global variables.
To set a breakpoint in your code you add the following line.
import pdb; pdb.set_trace()As with any code change, you must restart the Zenoss process that executes the code in question.