#! /usr/bin/env python3
#
def jeopardy ( filename = 'names.txt' ):

#*****************************************************************************80
#
## jeopardy() prints a random first name from a class roster file.
#
#  Discussion:
#
#    Pick a student, by first name, from a class roster.
#
#    The class roster is assumed to be a plain text file.
#    Each line lists one student.
#    The line lists the student's Pitt ID, first name, last name.
#
#  Licensing:
#
#    This code is distributed under the GNU LGPL license.
#
#  Modified:
#
#    12 January 2023
#
#  Author:
#
#    John Burkardt
#
#  Input:
#
#    string filename: the name of the class roster file.
#
  import numpy as np
#
#  We will create a list of names in the list "name".
#  Initialize it as an empty list, and set the length n to 0.
#
  n = 0
  name = []
#
#  Open the roster file.
#
  try:
    input = open ( filename, 'r' )
  except:
    print ( 'jeopardy(filename) could not open "' + filename + '"' )
    return
#
#  Read each line, split it into words, and copy the second word into "name".
#
  for line in input:
    words = line.split()
    name.append ( words[1] )
    n = n + 1

  input.close ( )
#
#  Pick a random integer n: 0 <= r < n
#
  r = np.random.randint ( low = 0, high = n )
#
#  Print the student first name from record r.
#
  print ( 'Python Jeopardy winner is #' + str ( r ) + ': ' + name[r] + '!' )

  return

if ( __name__ == "__main__" ):

  jeopardy ( 'math1800_roster.txt' )