使用循环更新Python数据框的特定行和列

import pandas as pd

data = {'Name': ['John', 'Emma', 'Mike', 'Emily'],
        'Age': [25, 28, 30, 27],
        'City': ['New York', 'London', 'Paris', 'Tokyo']}
df = pd.DataFrame(data)

condition = (df['Name'] == 'John') & (df['City'] == 'New York')

for index, row in df.iterrows():
    if condition[index]:
        df.at[index, 'Age'] = 26