>>> from ConfigParser import ConfigParser
>>> config = ConfigParser()
>>> config.add_section("hello")
>>> config.set("hello","key","dayu")
>>> config.write("/home/mahoru/test")
Traceback (most recent call last):
  File "<stdin>", line 1, in <module>
  File "/usr/lib/python2.5/ConfigParser.py", line 369, in write
    fp.write("[%s]\n" % section)
AttributeError: 'str' object has no attribute 'write'