#
#  Compute the sum of some numbers in a file
#
import sys

#
#  Read the name of the file from the user
#
if len(sys.argv) == 2:
  fname = sys.argv[1]
else:
  print("Usage: python", sys.argv[0], " <data file>")
  quit()

#
#  Open the file for reading
#
inf = open(fname, "r")

#
#  Sum the values in the file
#
total = 0
line = inf.readline()
while line != "":
  line = line.rstrip()
  print("Adding", line, "to the total...")
  total = total + int(line)
  print("Now the total is", total)
  line = inf.readline()

#
#  Close the file
#
inf.close()

#
#  Display the result
#
print("The total of those values is", total)