Pandas DataFrame不会删除基于字符串值的行

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', 'London', 'Paris', 'Tokyo']}
df = pd.DataFrame(data)

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

# 使用条件过滤删除基于字符串值的行
df = df.drop(df[df['City'] == 'London'].index)

# 打印删除后的DataFrame
print("删除后的DataFrame:")
print(df)

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