code: def open_for_io(self, writable, password):
          
          if not isinstance(writable, bool):
              raise TypeError("writable can only be an instance of type bool")
          if not isinstance(password, basestring):
              raise TypeError("password can only be an instance of type basestring")
          medium_io = self._call("openForIO",
                       in_p=[writable, password])
          medium_io = IMediumIO(medium_io)
          return medium_io
docs: Open the medium for I/O.
  
          in writable of type bool
              Set this to open the medium for both reading and writing.  When
              not set the medium is opened readonly.
  
          in password of type str
              Password for accessing an encrypted medium. Must be empty if not encrypted.
  
          return medium_io of type :class:`IMediumIO`
              Medium I/O object.