Pandas :：如何根据每月的总和绘制图表

import pandas as pd
import matplotlib.pyplot as plt

data = {'日期': ['2022-01-01', '2022-01-02', '2022-02-01', '2022-02-02', '2022-03-01', '2022-03-02'],
        '数值': [10, 15, 20, 25, 30, 35]}
df = pd.DataFrame(data)
df['日期'] = pd.to_datetime(df['日期'])

df.set_index('日期', inplace=True)
monthly_sum = df.resample('M').sum()

monthly_sum.plot(kind='bar')
plt.xlabel('月份')
plt.ylabel('总和')
plt.title('每月总和图表')
plt.show()