绘制一个pandas数据框列的Matplotlib直方图，并用点表示另一个列的平均值

import pandas as pd
import matplotlib.pyplot as plt

data = {'Column1': [1, 2, 3, 4, 5],
        'Column2': [6, 7, 8, 9, 10]}
df = pd.DataFrame(data)

plt.hist(df['Column1'])

mean_value = df['Column2'].mean()
plt.plot(mean_value, 0, 'ro', markersize=10)

import pandas as pd
import matplotlib.pyplot as plt

data = {'Column1': [1, 2, 3, 4, 5],
        'Column2': [6, 7, 8, 9, 10]}
df = pd.DataFrame(data)

plt.hist(df['Column1'])

mean_value = df['Column2'].mean()
plt.plot(mean_value, 0, 'ro', markersize=10)

plt.show()