如何迭代已存在的pandas数据帧中的特定列

import pandas as pd

# 创建一个示例数据帧
data = {'Name': ['John', 'Emma', 'Peter'],
        'Age': [28, 32, 45],
        'Salary': [5000, 6000, 7000]}
df = pd.DataFrame(data)

# 迭代特定列并修改值
for index, row in df.iterrows():
    # 以Salary列为例，对每一行进行操作
    salary = row['Salary']
    updated_salary = salary + 1000  # 对Salary列的值加上1000
    df.at[index, 'Salary'] = updated_salary

print(df)

   Name  Age  Salary
0  John   28    6000
1  Emma   32    7000
2 Peter   45    8000