use_file.py

《python编程金典》书中

#!/usr/bin/python
#filename:use_file.py
poem='''programming is fun
when the work is done
if you !!!!'''
f=file('poem.txt','w')
f.write(poem)
f.close()
f=file('poem.txt')
while True:
     line=f.readline()
     if len(line)==0:
          break
     print line,
f.close()