111
import sys
def readfile(filename):
'''Print a file the standard output.'''
f = file(filename)
while True:
line = f.readline()
if len(line) == 0:
break
print line, #notice comma
f.close()

if len(sys.argv) < 2:
print 'No action specified.'
sys.exit()

if sys.argv[1].startswith('--'):
option = sys.argv[1][2:]
if option == 'verison':
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 : Print the version number
--help : Display this help'''
else:
print 'Unknown option.'
sys.exit()
else:
for filename in sys.argv[1:]:
readfile(filename)
運行提示:
D:\python>python cat.py
File "cat.py", line 27
else:
^
SyntaxError: invalid syntax
誰知道這個哪里出錯了啊

































D:\python>python cat.py
File "cat.py", line 27
else:
^
SyntaxError: invalid syntax
誰知道這個哪里出錯了啊