使用图例legend时图形标签相同的情况

import matplotlib.pyplot as plt

fruit = ['apple', 'blueberry', 'cherry', 'orange']
fruitColor = ['red', 'blue', 'red', 'orange']
count = [40, 100, 30, 50]
color = ['red', 'blue', 'red', 'orange']

plt.bar(fruit,count, color=fruitColor, label=color)
plt.ylabel('fruit supply')
plt.title('Fruit supply by kind and color')
plt.legend(title='Fruit color')
plt.show()

可以发现，图例中red出现了两次，但是我们想让它只出现一次

import matplotlib.pyplot as plt

fruit = ['apple', 'blueberry', 'cherry', 'orange']
fruitColor = ['red', 'blue', 'red', 'orange']
count = [40, 100, 30, 50]
color = ['red', 'blue', '_red', 'orange']

plt.bar(fruit,count, color=fruitColor, label=color)
plt.ylabel('fruit supply')
plt.title('Fruit supply by kind and color')
plt.legend(title='Fruit color')
plt.show()

我们修改了列表color中的red，改为了_red