Python核心编程第二版学习笔记

#/usr/bin/env python

'makeTextFile.py -- create text file'

import os

ls = os.linesep

#get file name
while True:
fname = raw_input('Enter a filename:')
if os.path.exists(fname):
print "Error: '%s' already exists" % fname
else:
break

all = []
print "\n Enter lines ('.' by itself to quit).\n"
#loop until user terminates input
while True:
enter = raw_input('>')
if enter == '.':
break
else:
all.append(enter)

#write lines to file with proper line-ending
fobj = open(fname,'w')
fobj.writelines(['%s%s' % (x,ls) for x in all])
fobj.close()
print 'Done'