#! /usr/bin/env python3
#
def hello ( ):

#*****************************************************************************80
#
## hello() tries to load keras, say hello, and exit.
#
#  Discussion:
#
#    Why?  Because on some systems, it is almost impossible to load keras.
#    This program is so small that it eliminates many excuses for the failure.
#
#  Licensing:
#
#    This code is distributed under the MIT license.
#
#  Modified:
#
#    22 July 2020
#
#  Author:
#
#    John Burkardt.
#
  import keras
  import numpy as np
  import platform
  import tensorflow
  
  print ( '' )
  print ( 'hello():' )
  print ( '  python version:     ' + platform.python_version ( ) )
  print ( '  numpy version:      ' + np.version.version )
  print ( '  tensorflow version: ' + tensorflow.__version__ )
  print ( '  keras version:      ' + keras.__version__ )
  print ( '  Apparently, we were able to load keras!' )

  print ( '' )
  print ( '  Hello, world!' )
#
#  Terminate.
#
  print ( '' )
  print ( 'hello():' )
  print ( '  Normal end of execution.' )

  return

def timestamp ( ):

#*****************************************************************************80
#
## timestamp() prints the date as a timestamp.
#
#  Licensing:
#
#    This code is distributed under the MIT license. 
#
#  Modified:
#
#    21 August 2019
#
#  Author:
#
#    John Burkardt
#
  import time

  t = time.time ( )
  print ( time.ctime ( t ) )

  return

if ( __name__ == '__main__' ):
  timestamp ( )
  hello ( )
  timestamp ( )