根据pandas数据帧中的条件为列赋值

import pandas as pd

data = {'Name': ['Tom', 'Nick', 'John', 'Sam'],
        'Age': [20, 25, 30, 35],
        'Score': [80, 90, 85, 95]}
df = pd.DataFrame(data)

condition = df['Age'] >= 30
selected_data = df[condition]

df.loc[condition, 'Score'] = 100

print(df)

import pandas as pd

data = {'Name': ['Tom', 'Nick', 'John', 'Sam'],
        'Age': [20, 25, 30, 35],
        'Score': [80, 90, 85, 95]}
df = pd.DataFrame(data)

condition = df['Age'] >= 30
selected_data = df[condition]

df.loc[condition, 'Score'] = 100

print(df)

   Name  Age  Score
0   Tom   20     80
1  Nick   25     90
2  John   30    100
3   Sam   35    100