code: def version():
      
      with open(os.path.join(os.path.abspath(os.path.dirname(__file__)),
                             'pep8radius',
                             'main.py')) as input_file:
          for line in input_file:
              if line.startswith('__version__'):
                  return parse(line).body[0].value.s
docs: Return version string.