def dummyFunction(context, data):
    ...
    doing something
    ...
    return something

def dummyFunction(context, data):
    import pdb; pdb.set_trace()

if 'interesting' in data.keys():
    import pdb; pdb.set_trace()

class B(object):
    a = 0
    b = 1

b = B()
dir(b)

['__class__',
 '__delattr__',
 '__dict__',
 '__doc__',
 '__format__',
 '__getattribute__',
 '__hash__',
'__init__',
 '__module__',
 '__new__',
 '__reduce__',
 '__reduce_ex__',
 '__repr__',
 '__setattr__',
 '__sizeof__',
 '__str__',
 '__subclasshook__',
 '__weakref__',
 'a',
 'b']