import inspect
from xml.etree.ElementTree import Element
inspect.getsource(Element.__init__)
Traceback (most recent call last):
  File "<console>", line 1, in <module>
  File "C:\Python33\lib\inspect.py", line 726, in getsource
    lines, lnum = getsourcelines(object)
  File "C:\Python33\lib\inspect.py", line 715, in getsourcelines
    lines, lnum = findsource(object)
  File "C:\Python33\lib\inspect.py", line 551, in findsource
    file = getfile(object)
  File "C:\Python33\lib\inspect.py", line 435, in getfile
    'function, traceback, frame, or code object'.format(object))
TypeError: <slot wrapper '__init__' of 'Element' objects> is not a module, class, method, function, traceback, frame, or code object
inspect.getsource(Element)
Traceback (most recent call last):
  File "<console>", line 1, in <module>
  File "C:\Python33\lib\inspect.py", line 726, in getsource
    lines, lnum = getsourcelines(object)
  File "C:\Python33\lib\inspect.py", line 715, in getsourcelines
    lines, lnum = findsource(object)
  File "C:\Python33\lib\inspect.py", line 551, in findsource
    file = getfile(object)
  File "C:\Python33\lib\inspect.py", line 423, in getfile
    raise TypeError('{!r} is a built-in class'.format(object))
TypeError: <module 'builtins'> is a built-in class