Python 文件的读写操作

#!/usr/bin/python  #Filename:using_file.py    poem='python'    f=file('C:\\poem.txt','w') # open for 'w'riting.It will create new file  f.write(poem)#write text to file  f.close()#close the file    f=file('C:\\poem.txt','a') # open for 'a' .It will add string at old file  f.write(' very funning')  f.close()    f=file('C:\\poem.txt')  #if no mode is specified,'r'ead mode is assumed by default  while True:      line=f.readline()      if len(line)==0:          break      print line  f.close()#close the file

不管C盘存不存在，都创建poem.txt文本，写入一些文字后。再以追加的方式打开（不是重新创建），加入文字。最后以只读的方式读取文件