f = open("write.txt","w")
f.write("This is to write using python! ")
f.write("222 This is to write using python!")
f.close()


f = open("write.txt","r")
for row1 in f:
   print row1
f.close()

import os
os.remove("write.txt")

import os.path    
if os.path.isfile("postData"): os.remove("postData")  <==存在していたら消す。


-------------------------------output---------------------
$ python read_write.py
This is to write using python! 222 This is to write using python!