What is the right way to debug in iPython notebook?

Question

As I know, %debug magic can do debug within one cell.

However, I have function calls across multiple cells.

For example,

In[1]:          


        

Answer 1

You can always add this in any cell:

import pdb; pdb.set_trace()

and the debugger will stop on that line. For example:

In[1]: def fun1(a):
           def fun2(a):
               import pdb; pdb.set_trace() # debugging starts here
           return fun2(a)

In[2]: fun1(1)