utils.py 文件源码

def qualitative_cmap(n_colors=17):
    """Returns a colormap suitable for a categorical plot with many categories.


    Parameters
    ----------
    n_colors : int, default is 17
        The number of colors that, usually, matches with the number of
        categories.


    Returns
    -------
    list
        A list of hex colors.
    """
    set1 = sns.mpl_palette("Set1", n_colors=9)
    hex_colors = [rgb2hex(rgb) for rgb in set1]
    hex_colors[5] = '#FFDE00'
    if n_colors <= 9:
        return hex_colors
    if n_colors <= 17:
        n_colors = 17
    else:
        n_colors = 8 * ceil((n_colors - 1) / 8)
    gradient = polylinear_gradient(hex_colors, n_colors)
    return gradient