arraymodel.py 文件源码

def reset_minmax(self):
        try:
            data = self.get_values(sample=True)
            color_value = self.color_func(data) if self.color_func is not None else data
            if color_value.dtype.type == np.object_:
                color_value = color_value[is_number_value(color_value)]
                # this is probably broken if we have complex numbers stored as objects but I don't foresee
                # this case happening anytime soon.
                color_value = color_value.astype(float)
            # ignore nan, -inf, inf (setting them to 0 or to very large numbers is not an option)
            color_value = color_value[np.isfinite(color_value)]
            self.vmin = float(np.min(color_value))
            self.vmax = float(np.max(color_value))
            self.bgcolor_possible = True
        # ValueError for empty arrays, TypeError for object/string arrays
        except (TypeError, ValueError):
            self.vmin = None
            self.vmax = None
            self.bgcolor_possible = False