title: Which Python testing framework to use?
body: <p>I have lots of directories in which there are python files. All are plain python files. I have not used any sort of framework for the same. I want to test those py files from one central location. I should just fire one command and all the *_test.py files from each and every directory should be invoked.
  So, is there any ready tool or framework available for my requirement ?</p>
  
  <p>I an looking for PyUnit for testing plain py files. And thinking of writing one shell script which will invoke all these *_test.py files by using regex to match the file names.</p>
  
  <p>Anyone can suggest any other approach. You are always welcome.</p>
  
  <p>Thanks.</p>