lines of code within a class in python?

Question

I'm trying to find the number of lines of code within class or function that are stored in a python file my code is like this... what I want is to find number of lines of code in the a class not all the file ... is there any good way to do so??

import inspect
import foo    
for a,b in inspect.getmembers(foo):
    if inspect.isclass(b):
        print a  # find a class within the file

Answer 1

len(inspect.getsourcelines(a)[0])

From inspect.getsourcelines docs:

Return a list of source lines and starting line number for an object.

That's why you need the 0 index

Answer 2

You can still use inspect,

In [6]: from test import A

In [7]: import inspect

In [8]: inspect.getsourcelines(A)
Out[8]: 
(['class A(object):\n',
  '    pass\n',
  '    pass\n',
  '    pass\n',
  '    pass\n',
  '    pass\n',
  '    pass\n',
  '    pass\n',
  '    pass\n'],
 1)

len(inspect.getsourcelines(A)[0]) will return you want.