绘制两个不同数据帧中变量的平均值，并将其绘制在同一图形中

import pandas as pd
import matplotlib.pyplot as plt

df1 = pd.DataFrame({'Variable': [1, 2, 3, 4, 5], 'Value': [10, 20, 30, 40, 50]})
df2 = pd.DataFrame({'Variable': [1, 2, 3, 4, 5], 'Value': [15, 25, 35, 45, 55]})

mean1 = df1['Value'].mean()
mean2 = df2['Value'].mean()

plt.plot(df1['Variable'], df1['Value'], label='DataFrame 1')
plt.plot(df2['Variable'], df2['Value'], label='DataFrame 2')
plt.axhline(mean1, color='r', linestyle='--', label='Mean 1')
plt.axhline(mean2, color='g', linestyle='--', label='Mean 2')
plt.xlabel('Variable')
plt.ylabel('Value')
plt.title('Average Values of Variables')
plt.legend()
plt.show()