python 读写文件

#coding=utf-8
poem='''
Programming is fun
When the work is done
if you wanna make your work also fun:
        use Python!
'''

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()