如何在dict或list循环的熊猫数据框中创建一列?

时间:2019-09-19 09:26:00

标签: python pandas dataframe dictionary

有一个字典

dict_example = {

'Request_1': {
    'request_id' : '1',
    'name' : 'Foo'
},

'Request_2': {
    'request_id' : '2',
    'name' : 'Bar'

},

'Request_3': {
    'request_id' : '3',
    'name' : 'Barbie'
}

然后我通过此dict通过迭代发出API请求,每个请求都转换为一个数据框,结果存储在列表响应中。

API_request = get_me_api(
             for k,v in dict_example.items():
                 name=v['name'])

             responses.append(API_request)

responses = [df1, df2, df3]

df1

   age name city street
0   1   Foo  LA   street A

df2

   age name city street
0   10  Bar  NY   street B

df3

   age name   city street
0   20  Barbi  SF   street C

我想向每个数据框添加附加列'request_id'。

我尝试进行迭代

for v in yt_params.values():
               dict_example ['request_id'] = v['request_id']

# and just a list 

request_ids = [1,2,3]

for response in responses:
   for request in request_ids:
       response['request_id'] = request

但是它会为每个数据帧创建一个始终带有最后一个request_id的列

df1

   age name city street    request_id
0   1   Foo  LA   street A           3

df2

   age name city street   request_id
0   10  Bar  NY   street B          3

df3

   age name   city street    request_id
0   20  Barbi  SF   street C          3

2 个答案:

答案 0 :(得分:1)

您可能需要<input type="checkbox" name="test" title="Test" required>

例如:

zip

答案 1 :(得分:1)

您在循环中犯了一个错误。 request_id将始终以request_ids中的最后一个条目结尾。这是正在发生的事的一个示例:

letters = ["a", "b", "c"]
numbers = [1, 2, 3]
end_product = {}

for letter in letters:
    for number in numbers:
        end_product[letter] = number
        print(end_product)

输出:

{'a': 1}
{'a': 2}
{'a': 3}                  #Last iteration sets "a" to 3
{'a': 3, 'b': 1}
{'a': 3, 'b': 2}
{'a': 3, 'b': 3}          # Last iteration sets "b" to 3
{'a': 3, 'b': 3, 'c': 1}
{'a': 3, 'b': 3, 'c': 2}
{'a': 3, 'b': 3, 'c': 3}  # Last iteration sets "c" to 3