'''
   commandline.py
   Jeff Ondich, 2013-01-04
   Anna Rafferty, 2016-08-24 (conversion to python3)
   Jed Yang, 2017-01-07 

   Identical to linereader.py, but takes the input file path from
   the command line rather than from a hard-coded string.
   
   Intended as the Python half of parallel examples in Python and
   Java. See CommandLine.java.
'''

# START CHANGES
# This is the part that's different from linereader.py.
import sys

if len(sys.argv) != 2:
   print('Usage: python {} inputFilePath'.format(sys.argv[0]), file=sys.stderr)
   exit()

inputFilePath = sys.argv[1]
#END CHANGES

try:
   inputFile = open(inputFilePath)
except Exception as e:
   print('Cannot open', inputFilePath, file=sys.stderr)
   exit()

numberOfLines = 0
for line in inputFile:
   print(line.upper(), end='')
   numberOfLines += 1
print('\nNumber of lines:', numberOfLines)