def pnlSingle(
            self, account: str = '', modelCode: str = '',
            conId: int = 0) -> List[PnLSingle]:
        """
        List of subscribed :class:`.PnLSingle` objects (profit and loss for
        single positions).

        The :class:`.PnLSingle` objects are kept live updated.

        Args:
            account: If specified, filter for this account name.
            modelCode: If specified, filter for this account model.
            conId: If specified, filter for this contract ID.
        """
        return [v for v in self.wrapper.pnlSingles.values() if
                (not account or v.account == account) and
                (not modelCode or v.modelCode == modelCode) and
                (not conId or v.conId == conId)]