Python嵌套字典替换异常：添加字典出现引号与转义符

问题原因 #

你用json.dumps(raw_payload)把Python字典转换成了JSON格式的字符串，当把这个字符串赋值给current_dict["payload"]时，它会以字符串形式存储，所以显示时会带引号和转义符——这是字符串在Python中的正常表示方式。

解决方案 #

直接将原始字典raw_payload赋值给current_dict["payload"]，不需要转成JSON字符串：

current_dict = {"header": {"from": "/app/off_grid_control/subscribe",
                           "messageId": "ef6b8e50620ac768569f1f7abc6507a5", "method": "SET",
                           "namespace": "Appliance.Control.ToggleX", "payloadVersion": 1,
                           "sign": "e48c24e510044d7e2d248c68ff2c10ca", "timestamp": 1601908439,
                           "triggerSrc": "Android"}, "payload": {"togglex": {"channel": 0, "onoff": 1}}}

raw_payload = {"togglex": {"channel": 0, "onoff": 0}}
# 直接赋值字典，跳过json.dumps步骤
current_dict["payload"] = raw_payload

print(current_dict)

执行后，current_dict的payload字段会是干净的嵌套字典：

{"header": {"from": "/app/off_grid_control/subscribe",
            "messageId": "ef6b8e50620ac768569f1f7abc6507a5", "method": "SET",
            "namespace": "Appliance.Control.ToggleX", "payloadVersion": 1,
            "sign": "e48c24e510044d7e2d248c68ff2c10ca", "timestamp": 1601908439,
            "triggerSrc": "Android"}, "payload": {"togglex": {"channel": 0, "onoff": 0}}}

补充说明 #

如果后续需要把整个current_dict转换成JSON字符串用于传输或存储，再统一调用json.dumps(current_dict)即可，这样不会出现嵌套的字符串转义问题。

内容的提问来源于stack exchange，提问作者Markus