Helper function to compute tick mappings based on `ticks` and
        default orders and bins.

def _compute_tick_mapping(self, kind, order, bins):
        """Helper function to compute tick mappings based on `ticks` and
        default orders and bins.

        """

        if kind == "angle":
            ticks = self.xticks
            reverse = True
        elif kind == "radius":
            ticks = self.yticks
            reverse = False

        if callable(ticks):
            text_nth = [x for x in order if ticks(x)]

        elif isinstance(ticks, (tuple, list)):
            bins = self._get_bins(kind, ticks, reverse)
            text_nth = ticks

        elif ticks:
            nth_label = np.ceil(len(order) / float(ticks)).astype(int)
            text_nth = order[::nth_label]

        return {x: bins[x] for x in text_nth}