def dst(self):
        offset = _call_tzinfo_method(self._tzinfo, "dst", self)
        offset = _check_utc_offset("dst", offset)
        if offset is not None:
            offset = timedelta(minutes=offset)
        return offset

    # Return an integer (or None) instead of a timedelta (or None).1573
Parametric Risch Differential Equation - Generate linear constraints on the constants.
dataset/ETHPy150Open azoft-dev-team/imagrium/env/Lib/datetime.py/datetime.dst--crossover with--dataset/ETHPy150Open sympy/sympy/sympy/integrals/prde.py/prde_linear_constraints