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pynista
Asked:2020-04-20 16:23:40 +0000 UTC2020-04-20 16:23:40 +0000 UTC

如何从字典和嵌套字典中移除值为None的元素？

  • 772

如何从值为 的字典中删除元素None？从 json 字符串中检索字典。

源字典可能包含嵌套字典，您需要再次从中删除值为 的元素None。在嵌套字典中，您可能需要对一些字典进行同样的操作。等等。

例子。假设我们有以下字典：

{  
   "chat_id":234,
   "disable_notification": None,
   "disable_web_page_preview": None,
   "parse_mode": None,
   "reply_markup":{  
      "inline_keyboard":[  
         [  
            {  
               "callback_data": None,
               "callback_game": None,
               "pay": None,
               "switch_inline_query": None,
               "switch_inline_query_current_chat": None,
               "text":"add",
               "url": None
            },
            {  
               "callback_data": None,
               "callback_game": None,
               "pay": None,
               "switch_inline_query": None,
               "switch_inline_query_current_chat": None,
               "text":"sub",
               "url": None
            }
         ]
      ]
   },
   "reply_to_message_id": None,
   "text":"45456546"
}

结果应该是以下字典：

{  
   "chat_id":234,
   "reply_markup": {  
      "inline_keyboard":[  
         [  
            {  
               "text":"add",
            },
            {  
               "text":"sub",
            }
         ]
      ]
   },
   "text":"45456546"
}
python

1 个回答

  1. Best Answer
    def dict_trim(elem):
    if isinstance(elem, dict):
        return {k: dict_trim(v)
                for (k, v) in elem.items()
                if v is not None
                }
    if isinstance(elem, list):
        return [dict_trim(item) for item in elem]
    return elem

print(dict_trim(ваш_словарь))
    • 1

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