Python 在Matplotlib中显示多个线条图例

我试图显示我的线图的所有4个图例，列标题作为各自的图例名称。 是否有一种优雅的方法可以执行此操作，而不必编写单独的代码行来绘制和标记每一列

我当前数据集的示例如下：

import numpy as np
import matplotlib.pyplot as plt
import pandas as pd

x = pd.Series(np.array([1,2,3,4,5,6,7,8,9,10]))
y = pd.DataFrame(np.random.rand(10,4))
y.columns = ["A","B","C","D"]
fig, ax = plt.subplots(figsize=(10, 7))
ax.plot(x, y, label=True)

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实际上，您可以使用pandas中定义的plot函数：

import numpy as np
import matplotlib.pyplot as plt
import pandas as pd

x = pd.Series(np.array([1,2,3,4,5,6,7,8,9,10]))
y = pd.DataFrame(np.random.rand(10,4))
y.columns = ["A","B","C","D"]
y['x'] = x
fig, ax = plt.subplots(figsize=(10, 7))
y.plot(ax=ax)