owmap.py 文件源码

def set_marker_size(self, attr, update=True):
        try:
            self._size_attr = variable = self.data.domain[attr]
            if len(self.data) == 0:
                raise Exception
        except Exception:
            self._size_attr = None
            self._legend_sizes = []
        else:
            assert variable.is_continuous
            self._raw_sizes = values = self.data.get_column_view(variable)[0].astype(float)
            # Note, [5, 60] is also hardcoded in legend-size-indicator.svg
            self._sizes = scale(values, 5, 60).astype(np.uint8)
            min = np.nanmin(values)
            self._legend_sizes = self._legend_values(variable,
                                                     [min, np.nanmax(values)]) if not np.isnan(min) else []
        finally:
            if update:
                self.redraw_markers_overlay_image(new_image=True)