如何在迭代时将变量赋值给df

Question

以下是代码

list_keys = ["model no","size","shape"]

for key in  list_keys:
    df[key]=""
for i in df.index:
    df.URL.ix[i] = "https:"+df.URL.ix[i]
    df.dictionary_quick_detail.ix[i] = json.dumps(dictionary_extractor(df.URL.ix[i])[0])
    temp_dict = json.loads(df.dictionary_quick_detail.ix[i])

    for key in list_keys:
        df.key.ix[i] = some_function(key)

如何将键变为变量？我得到的错误是：

  

DataFrame没有属性键