两个使用Python脚本操作文件的小示例分享

#!/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