The 'hands-on” in the palette world-palettable

• Some friends say that python visualization’s built-in colors are ugly, then you must not have encountered palettable , palettable is a colorbar (Colormap) library written in pure python, which brings together a large number of colorbars from well-known visualization software (such as Tableau color system, matplotlib partial color system, etc.). There are a total of 1587 colorbar (Colormap) categories that can be used. There are tens of thousands of single colors. This article details how to use palettable.
  
  
  

Contents of this article

1. Quick installation of palettable

pip install palettable -i https://pypi.tuna.tsinghua.edu.cn/simple

2. Quick use of palettable color bar (Colormap)

Import palettable package

import palettable
from palettable.cartocolors.qualitative import Bold_9

#为了描述方便，此处直接倒入palettable.cartocolors.qualitative大类下的Bold_9小类，
#实际使用时可直接用palettable.cartocolors.qualitative.Bold_9

palettable important properties-visualized chroma bar

Bold_9.show_discrete_image()#Bold_9各种颜色条图片

palettable important attribute-the number of single colors in the output chroma bar

print(Bold_9.number)#Bold_9这种colormap中单颜色的数目

9That is, the above picture has 9 cells

palettable important attributes-output the color number value of a single color in the chroma bar

print(Bold_9.colors)#Bold_9 colormap中每种颜色的RGB格式色号

print(Bold_9.hex_colors)#Bold_9 colormap中每种颜色的hex格式色号
print(Bold_9.mpl_colors)#RGB tuples in the range 0-1 as used by matplotlib

[[127, 60, 141], [17, 165, 121], [57 , 105, 172], [242, 183, 1], [231, 63, 116], [128, 186, 90], [230, 131, 16], [0, 134, 149], [207, 28 , 144]]

['#7F3C8D', '#11A579', '#3969AC', '#F2B701', '#E73F74', '#80BA5A', '#E68310', '#008695' . 0.003 92156862745098), (0.9058823529411765, 0.24705882352941178, 0.4549019607843137), (0.5019607843137255, 0.7294117647058823, 0.35294117647058826), (0.9019607843137255, 0.5137254901960784, 0.06274509803921569), (0.0, 0.5254901960784314, 0.5843137254901961), (0.8117647058823529, 0.10980392156862745, 0.56470588235294 12)]

Matplotlib中使用palettable

例子来自matplotlib-饼图（pie）

import matplotlib.pyplot as plt
import matplotlib as mpl
import palettable

mpl.rc_file_defaults()
my_dpi = 96
plt.figure(figsize=(580 / my_dpi, 580 / my_dpi), dpi=my_dpi)
plt.subplot(221)
patches, texts, autotexts = plt.pie(
    x=[1, 2, 3],
    labels=['A', 'B', 'C'],
    #使用palettable.tableau.BlueRed_6
    colors=palettable.tableau.BlueRed_6.mpl_colors[0:3],
    autopct='%.2f%%',
    explode=(0.1, 0, 0))

patches[0].set_alpha(0.3)
patches[2].set_hatch('|')
patches[1].set_hatch('x')
plt.title('tableau.BlueRed_6', size=12)

mpl.rc_file_defaults()
plt.subplot(222)

patches, texts, autotexts = plt.pie(
    x=[1, 2, 3],
    labels=['A', 'B', 'C'],
    #使用palettable.cartocolors.qualitative.Bold_9
    colors=palettable.cartocolors.qualitative.Bold_9.mpl_colors[0:3],
    autopct='%.2f%%',
    explode=(0.1, 0, 0))

patches[0].set_alpha(0.3)
patches[2].set_hatch('|')
patches[1].set_hatch('x')
plt.title('cartocolors.qualitative.Bold_9', size=12)

mpl.rc_file_defaults()
plt.subplot(223)

patches, texts, autotexts = plt.pie(
    x=[1, 2, 3],
    labels=['A', 'B', 'C'],
    #使用palettable.cartocolors.qualitative.Bold_9
    colors=palettable.cartocolors.qualitative.Bold_9.mpl_colors[0:3],
    autopct='%.2f%%',
    explode=(0.1, 0, 0))

patches[0].set_alpha(0.3)
patches[2].set_hatch('|')
patches[1].set_hatch('x')
plt.title('cartocolors.qualitative.Bold_9', size=12)

plt.subplot(223)

patches, texts, autotexts = plt.pie(
    x=[1, 2, 3],
    labels=['A', 'B', 'C'],
    #使用palettable.lightbartlein.sequential.Blues10_5
    colors=palettable.lightbartlein.sequential.Blues10_5.mpl_colors[0:3],
    autopct='%.2f%%',
    explode=(0.1, 0, 0))

#matplotlib.patches.Wedge
patches[0].set_alpha(0.3)
patches[2].set_hatch('|')
patches[1].set_hatch('x')
plt.title('lightbartlein.sequential.Blues10_5', size=12)

plt.subplot(224)

patches, texts, autotexts = plt.pie(
    x=[1, 2, 3],
    labels=['A', 'B', 'C'],
    colors=palettable.wesanderson.Moonrise5_6.mpl_colors[0:3],
    autopct='%.2f%%',
    explode=(0.1, 0, 0))

patches[0].set_alpha(0.3)
patches[2].set_hatch('|')
patches[1].set_hatch('x')
plt.title('wesanderson.Moonrise5_6', size=12)
plt.show()

Seaborn中使用palettable

例子来自几行代码绘制靓丽矩阵图
使用palettable.tableau.TrafficLight_9

import seaborn as sns
iris_sns = sns.load_dataset("iris")

import palettable

g = sns.pairplot(
    iris_sns,
    hue='species',
    palette=palettable.tableau.TrafficLight_9.mpl_colors,  #Matplotlib颜色
)
sns.set(style='whitegrid')
g.fig.set_size_inches(10, 8)
sns.set(style='whitegrid', font_scale=1.5)

使用palettable.tableau.BlueRed_6
使用palettable.cartocolors.qualitative.Bold_9使用palettable.wesanderson.Moonrise5_6使用palettable.cartocolors.diverging.ArmyRose_7_r

3、palettable包含那些颜色条(Colormap)

palettable下面有16大类Colormap，共计1587小类Colormap，合计上万种单颜色可供使用，已经整理为pdf格式，感兴趣的可以
包含以下16大类

palettable.cartocolors.diverging
palettable.cartocolors.qualitative
palettable.cartocolors.sequential
palettable.cmocean.diverging
palettable.cmocean.sequential
palettable.colorbrewer.diverging
palettable.colorbrewer.qualitative
palettable.colorbrewer.sequential
palettable.lightbartlein.diverging
palettable.lightbartlein.sequential
palettable.scientific.diverging
palettable.scientific.sequential
palettable.matplotlib
palettable.mycarta
palettable.tableau
palettable.wesanderson

共计1587小类【每个小类还有逆类，名称后面加“_r”即可】上面16大类下面有数个小类，例如，著名BI软件Tableau的配色条palettable.tableau这一大类，下面有palettable.tableau.BlueRed_12，palettable.tableau.GreenOrange_12等等数个小类：

palettable.tableau.BlueRed_12
palettable.tableau.BlueRed_6
palettable.tableau.ColorBlind_10
palettable.tableau.Gray_5
palettable.tableau.GreenOrange_12
palettable.tableau.GreenOrange_6
palettable.tableau.PurpleGray_12
palettable.tableau.PurpleGray_6
palettable.tableau.TableauLight_10
palettable.tableau.TableauMedium_10
palettable.tableau.Tableau_10
palettable.tableau.Tableau_20
palettable.tableau.TrafficLight_9

也就是类似上面的这种有1587行。