(self, path, flags)
return 0
When raw_fi is False (default case), open should return a numerical
        file handle.

        When raw_fi is True the signature of open becomes:
            open(self, path, fi)

        and the file handle should be set directly.
When raw_fi is False (default case), open should return a numerical
        file handle.
When raw_fi is False ( default case ) open should return a numerical file handle .
def open(self, path, flags):
        '''
        When raw_fi is False (default case), open should return a numerical
        file handle.

        When raw_fi is True the signature of open becomes:
            open(self, path, fi)

        and the file handle should be set directly.
        '''

        return 0
def open ( self , path , flags ) : return 0