在python中使用列名和索引创建一个循环

import pandas as pd

data = {'列名1': ['值1', '值2', '值3'],
        '列名2': ['值4', '值5', '值6'],
        '列名3': ['值7', '值8', '值9']}
df = pd.DataFrame(data, index=['索引1', '索引2', '索引3'])

for column in df.columns:
    print("列名:", column)
    
for index in df.index:
    print("索引:", index)

for index, row in df.iterrows():
    print("索引:", index)
    for column in df.columns:
        print("列名:", column, "值:", row[column])