Can you reverse the order of a branca colormap?

Question

I have a branca colormap, is it possible flip it's order?

e.g. This:

To this:

Code:

import branca.colormap as cm
den_colormap = cm.linear.RdBu_11

Answer 1

Try this:

import branca.colormap as cm

den_colormap = cm.linear.RdBu_11.colors
print('Original : \n', den_colormap)

den_colormap.reverse()
print('reversed : \n', den_colormap)

out = cm.LinearColormap(colors=den_colormap)
print('out : \n', out.colors)

Output:

Original : 
 [(0.403921568627451, 0.0, 0.12156862745098039, 1.0), (0.6980392156862745, 0.09411764705882353, 0.16862745098039217, 1.0), (0.8392156862745098, 0.3764705882352941, 0.30196078431372547, 1.0), (0.9568627450980393, 0.6470588235294118, 0.5098039215686274, 1.0), (0.9921568627450981, 0.8588235294117647, 0.7803921568627451, 1.0), (0.9686274509803922, 0.9686274509803922, 0.9686274509803922, 1.0), (0.8196078431372549, 0.8980392156862745, 0.9411764705882353, 1.0), (0.5725490196078431, 0.7725490196078432, 0.8705882352941177, 1.0), (0.2627450980392157, 0.5764705882352941, 0.7647058823529411, 1.0), (0.12941176470588237, 0.4, 0.6745098039215687, 1.0), (0.0196078431372549, 0.18823529411764706, 0.3803921568627451, 1.0)]

reversed : 
 [(0.0196078431372549, 0.18823529411764706, 0.3803921568627451, 1.0), (0.12941176470588237, 0.4, 0.6745098039215687, 1.0), (0.2627450980392157, 0.5764705882352941, 0.7647058823529411, 1.0), (0.5725490196078431, 0.7725490196078432, 0.8705882352941177, 1.0), (0.8196078431372549, 0.8980392156862745, 0.9411764705882353, 1.0), (0.9686274509803922, 0.9686274509803922, 0.9686274509803922, 1.0), (0.9921568627450981, 0.8588235294117647, 0.7803921568627451, 1.0), (0.9568627450980393, 0.6470588235294118, 0.5098039215686274, 1.0), (0.8392156862745098, 0.3764705882352941, 0.30196078431372547, 1.0), (0.6980392156862745, 0.09411764705882353, 0.16862745098039217, 1.0), (0.403921568627451, 0.0, 0.12156862745098039, 1.0)]

out : 
 [(0.0196078431372549, 0.18823529411764706, 0.3803921568627451, 1.0), (0.12941176470588237, 0.4, 0.6745098039215687, 1.0), (0.2627450980392157, 0.5764705882352941, 0.7647058823529411, 1.0), (0.5725490196078431, 0.7725490196078432, 0.8705882352941177, 1.0), (0.8196078431372549, 0.8980392156862745, 0.9411764705882353, 1.0), (0.9686274509803922, 0.9686274509803922, 0.9686274509803922, 1.0), (0.9921568627450981, 0.8588235294117647, 0.7803921568627451, 1.0), (0.9568627450980393, 0.6470588235294118, 0.5098039215686274, 1.0), (0.8392156862745098, 0.3764705882352941, 0.30196078431372547, 1.0), (0.6980392156862745, 0.09411764705882353, 0.16862745098039217, 1.0), (0.403921568627451, 0.0, 0.12156862745098039, 1.0)]