python <name of program> -- does not give error.

[GoogleCodeExporter]

What steps will reproduce the problem?

In your example code :
EXAMPLE USAGE:


  FLAGS = gflags.FLAGS

  # Flag names are globally defined!  So in general, we need to be
  # careful to pick names that are unlikely to be used by other libraries.
  # If there is a conflict, we'll get an error at import time.
  gflags.DEFINE_string('name', 'Mr. President', 'your name')
  gflags.DEFINE_integer('age', None, 'your age in years', lower_bound=0)
  gflags.DEFINE_boolean('debug', False, 'produces debugging output')
  gflags.DEFINE_enum('gender', 'male', ['male', 'female'], 'your gender')

  def main(argv):
    try:
      argv = FLAGS(argv)  # parse flags
    except gflags.FlagsError, e:
      print '%s\\nUsage: %s ARGS\\n%s' % (e, sys.argv[0], FLAGS)
      sys.exit(1)
    if FLAGS.debug: print 'non-flag arguments:', argv
    print 'Happy Birthday', FLAGS.name
    if FLAGS.age is not None:
      print 'You are a %d year old %s' % (FLAGS.age, FLAGS.gender)

  if __name__ == '__main__':
    main(sys.argv)

-------------------------------------------------------
[admin@gaudalvi-centos6 client]$ python temp.py --
Happy Birthday Mr. President

This should be error.

What is the expected output? What do you see instead?
Happy Birthday Mr. President

What version of the product are you using? On what operating system?
Cent OS 6.6
Python 2.6.6

Please provide any additional information below.

Original issue reported on code.google.com by gaurav1...@gmail.com on 18 Feb 2015 at 10:51

[gpshead]

python-gflags users should migrate to absl-py:
https://github.com/abseil/abseil-py
https://pypi.python.org/pypi/absl-py/

It is the modern version of this library.