#!/usr/bin/env python 
 
'makeTextFile.py -- create text file' 
 
import os 
ls = os.linesep 
 
#get filename 
while True: 
 fname = raw_input('Enter filename:') 
 if os.path.exists(fname): 
  print "ERROR: '%s' already exists" % fname 
 else: 
  break 
 
#get file content (text) lines 
all = [] 
print "\nEnter lines('.' by itself to quit).\n" 
 
#loop until user terminates input 
while True: 
 entry = raw_input('>') 
 if entry == '.': 
  break 
 else: 
  all.append(entry) 
 
#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!' 
os.linesep表示行结尾标志, 用本地变量名ls代替它节省了时间,并减少了消耗系统资源.
用 raw_input()读入文件名
用列表all[]来保存每一行文本(它们暂时在内存中).
最后创建文件后,用writelines()把内存中的行写入打开的文件中.

#!/usr/bin/env python 
 
'readTextFile.py -- read and display text file' 
 
#get filename 
fname = raw_input('Enter filename: ') 
print 
 
#attempt to open file for reading 
try: 
 fobj = open(fname, 'r') 
except IOError, e: 
 print "*** file open error:", e 
else: 
 #display contents to the screen 
 for eachLine in fobj: 
  print eachLine, 
 fobj.close() 

$chmod a+x filename