scale.py 文件源码

def map(self, x, limits=None):
        """
        Return an array-like of x mapped to values
        from the scales palette
        """
        if limits is None:
            limits = self.limits

        n = sum(~pd.isnull(list(limits)))
        pal = self.palette(n)
        if isinstance(pal, dict):
            # manual palette with specific assignments
            pal_match = [pal[val] for val in x]
        else:
            pal = np.asarray(pal)
            pal_match = pal[match(x, limits)]
            pal_match[pd.isnull(pal_match)] = self.na_value
        return pal_match