Python 中对文件的输入输出

 #! /usr/bin/python

 # Filename:using_file.py

 poem = '''\

 Programming is fun

 When the work is done

 if you wanna make your work also fun:

     use Pyhon!

 '''

 f = file('poem.txt', 'w') # open for 'w'riting

 f.write(poem) # write text to file

 f.close() # close the file

 f = file('poem.txt')

 # if no mode is sepecified, 'r'ead mode is assumed by default

 while True:

     line = f.readline()

     if len(line) == 0: # zero length indecates eof

         break

     print line,

     # notice comma to avoid automatic newline added by python

 f.close() # close the file