Matplotlib：如何从列表中为所有国家绘制随机颜色？

Question

如何为列表中的每个国家分配随机颜色以在地图上绘制？

import matplotlib.pyplot as plt
import numpy as np
import geopandas as gpd


world = gpd.read_file(gpd.datasets.get_path('naturalearth_lowres'))
ax2 = world.plot(figsize=(15,15), edgecolor=u'white', color='gray')


countries = ['Germany', 'Norway', 'Russia', 'China', 'Japan']

world.loc[world['name'].isin(countries)].plot(edgecolor=u'white', color=np.random.rand(3,), ax=ax2)

ax2.axis('scaled')
plt.show()

现在看起来是这样的：

Answer 1

这似乎有效。有没有更好的方法？

for contry in countries:
    world.loc[world['name'].isin([contry])].plot(edgecolor=u'white', color=np.random.rand(3,), ax=ax2)
    ax2.axis('scaled')

Answer 2

我添加了这些行：

for name in (countries):
    world.loc[world['name'].eq(name)].plot(edgecolor=u'white', color=np.random.rand(3,), ax=ax2)

而不是这一行：

world.loc[world['name'].isin(countries)].plot(edgecolor=u'white', color=np.random.rand(3,), ax=ax2)

完整代码：

import matplotlib.pyplot as plt
import numpy as np
import geopandas as gpd


world = gpd.read_file(gpd.datasets.get_path('naturalearth_lowres'))
ax2 = world.plot(figsize=(15,15), edgecolor=u'white', color='gray')


countries = ['Germany', 'Norway', 'Russia', 'China', 'Japan']
for name in (countries):
    world.loc[world['name'].eq(name)].plot(edgecolor=u'white', color=np.random.rand(3,), ax=ax2)

ax2.axis('scaled')
plt.show()

输出：

Matplotlib：如何从列表中为所有国家绘制随机颜色？

Matplotlib: how to plot a random colour to all countries from the list?

python

colors

matplotlib

geopandas