在pandas数据框中快速搜索并基于条件在数据框的另一列中插入值

import pandas as pd

# 读取数据框
df = pd.read_csv('data.csv')

# 搜索满足条件的行，并在另一列中插入值
df.loc[df['条件列'] == '条件值', '插入列'] = '插入值'

# 导入pandas库
import pandas as pd

# 创建数据框
data = {'Name': ['Tom', 'Nick', 'John', 'Tom'],
        'Age': [20, 21, 22, 23]}
df = pd.DataFrame(data)

# 搜索满足条件的行，并在另一列中插入值
df.loc[df['Name'] == 'Tom', 'Gender'] = 'Male'

# 打印结果
print(df)

   Name  Age Gender
0   Tom   20   Male
1  Nick   21    NaN
2  John   22    NaN
3   Tom   23   Male