PDB: How to check local function variables in nested stack frames?

Question

Context:

I am running some python code through PDB (Python debugger). When I set and then hit a breakpoint, I can check the local variables using:

(Pdb) locals() 

This displays a nice pair of names, pairs of values ​​of local variables in the current area in which I am paused. Fine!

I also see a stack trace with the PDB where command, which leads to something like this:

  /System/Library/Frameworks/Python.framework/Versions/2.7/lib/python2.7/bdb.py(400)run() -> exec cmd in globals, locals <string>(1)<module>() .../main.py(116)<module>() -> run() .../main.py(104)run() -> res = quicksort(res) > .../main.py(68)quicksort() -> if len(v) <= 1: 

In this example output, I am suspended in the quicksort() function, which was called by the run() function.

So far so good.

Question:

If I can check the local variables of the quicksort() function with a call to locals() , how can I similarly check the local variables of the run() function?

In other words, how can I check the local variables of a function that is nested on a call stack?

Important clarification . I DO NOT want to continue or step in run() to check its local variables. I want to check (from my current, suspended perspective) the local variables in the run() stack frame that are currently nested on the call stack.

Answer 1

(i)pdb offer up and down commands, letting you navigate the call stack so you can visit higher levels of your call and check for local variables there.

Repeat a few debugging tutorials, this is likely to become clear on the second attempt.