# average6a.py
# From Zelle's average6.py but with exception handling for no numbers input
#
# Average numbers in a file using a sentinal loop on EOF
#

def main():


  filename = raw_input("What file are the numbers in? ")
  infile = open(filename,'r')

  sum = 0.0
  count = 0

  line = infile.readline()
  while line != "":
    print eval(line)
    sum = sum + eval(line)
    count = count + 1
    line = infile.readline()
  infile.close()

  try:
    print"\nAverage is: ", sum/count

  except ZeroDivisionError:
    print "You must enter at least one number"
    

main()