#!/usr/bin/env python
# Filename: cat.py
import sys
def readfile(filename):
'''Print a file to the standard output.'''
f=file(filename)
while True:
line=f.readline()
if len(line)==0:
break
print line, # notice comma
f.close()
# Script starts from here
if len(sys.argv)<2:
print 'No action specified.'
sys.exit()
if sys.argv[1].startswith('--'):
option=sys.argv[1][2:]
# fetch sys.argv[1] but without the first two characters
if option=='version':
print 'Version 1.2'
elif option=='help':
print '''\
This program prints files to the standard output.
Any number of files can be specified.
Options include:
--version : Prints the version number
--help : Display this help'''
else:
print 'Unknown option.'
sys.exit()
else:
for filename in sys.argv[1:]:
readfile(filename)
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