pandas dataframe，if condition match and index彼此相邻:添加值并删除所使用的行

import pandas as pd

# 创建一个示例DataFrame
data = {'Name': ['Alice', 'Bob', 'Charlie', 'David'],
        'Age': [25, 30, 35, 40],
        'City': ['New York', 'Paris', 'London', 'Tokyo']}
df = pd.DataFrame(data)

# 打印原始DataFrame
print("原始DataFrame:")
print(df)

# 定义条件
condition = df['Age'] > 30

# 获取满足条件的行的索引
indexes = df[condition].index

# 添加值并删除相应的行
df.at[indexes, 'City'] = 'Beijing'
df = df.drop(indexes)

# 打印处理后的DataFrame
print("处理后的DataFrame:")
print(df)

原始DataFrame:
      Name  Age      City
0    Alice   25  New York
1      Bob   30     Paris
2  Charlie   35    London
3    David   40     Tokyo
处理后的DataFrame:
    Name  Age      City
0  Alice   25  New York
1    Bob   30     Paris