(self)
Returns underlying file descriptor (an int) if one exists.

        An OSError is raised if the IO object does not use a file descriptor.
Returns underlying file descriptor (an int) if one exists.
Returns underlying file descriptor ( an int ) if one exists .
def fileno(self):
        """Returns underlying file descriptor (an int) if one exists.

        An OSError is raised if the IO object does not use a file descriptor.
        """
        self._unsupported("fileno")
def fileno ( self ) : self . _unsupported ( "fileno" )