scikit-learn: Exception thrown when running example 'Classification of text documents using sparse data'

Description

When the running this example, it throws an exception at the line:

(opts, args) = op.parse_args()

Expected Results

The bar plot indicating the accuracy, training time (normalized) and test time (normalized) of each classifier.

Actual Results

Usage: __main__.py [options]

__main__.py: error: no such option: -f

Trackback:

/usr/lib/python2.7/optparse.pyc in parse_args(self, args, values)
   1400             stop = self._process_args(largs, rargs, values)
   1401         except (BadOptionError, OptionValueError), err:
-> 1402             self.error(str(err))
   1403 
   1404         args = largs + rargs

/usr/lib/python2.7/optparse.pyc in error(self, msg)
   1582         """
   1583         self.print_usage(sys.stderr)
-> 1584         self.exit(2, "%s: error: %s\n" % (self.get_prog_name(), msg))
   1585 
   1586     def get_usage(self):

/usr/lib/python2.7/optparse.pyc in exit(self, status, msg)
   1572         if msg:
   1573             sys.stderr.write(msg)
-> 1574         sys.exit(status)
   1575 
   1576     def error(self, msg):

SystemExit: 2

Versions

Linux-3.19.0-15-generic-x86_64-with-Ubuntu-15.04-vivid Python 2.7.9 (default, Apr 2 2015, 15:33:21) [GCC 4.9.2] NumPy 1.11.2 SciPy 0.18.1 Scikit-Learn 0.18