使用具有多个条件的逻辑将列添加到pandas DataFrame

import pandas as pd

# 创建一个DataFrame对象
data = {'Name': ['Tom', 'Nick', 'John', 'Sam'],
        'Age': [20, 25, 30, 35],
        'Gender': ['Male', 'Male', 'Female', 'Male']}
df = pd.DataFrame(data)

# 添加一个新的列，根据条件逻辑进行赋值
df['Category'] = ''
df.loc[(df['Age'] < 25) & (df['Gender'] == 'Male'), 'Category'] = 'Young Male'
df.loc[(df['Age'] >= 25) & (df['Gender'] == 'Male'), 'Category'] = 'Old Male'
df.loc[df['Gender'] == 'Female', 'Category'] = 'Female'

# 打印DataFrame
print(df)

  Name  Age  Gender    Category
0   Tom   20    Male  Young Male
1  Nick   25    Male    Old Male
2  John   30  Female      Female
3   Sam   35    Male    Old Male