Building a json dynamically in Python

Question

I am trying to build a JSON in Python. I want to send it to Slack.

xxdata = []
xxdata.append("Option A")
xxdata.append("Option B")
data=[]
for xx in xxdata:
    item = {"text": {
                        "type": "plain_text",
                        "text": xx,
                        "emoji": True
                    }}
    data.append(dict(item))
jsonData=json.dumps(data)

This is how I am sending it to slack:

        {
        "type": "section",
        "block_id": "Settings1",
        "text": {
            "type": "mrkdwn",
            "text": ":gear: *MAIN*\nSelect your main group"
        },
        "accessory": {
            "type": "static_select",
            "placeholder": {
                "type": "plain_text",
                "text": "Option A",
                "emoji": True
            },
            "options": jsonData,
            "action_id": "NotificationSelect"
        }

However, when it is sent to Slack - I am getting additional quotation marks before and after the option data:

    {
     "type": "section", 
     "block_id": "Settings1", 
     "text": 
           {
               "type": "mrkdwn", 
               "text": ":gear: *MAIN*\nSelect your main group"}, 
     "accessory": {
               "type": "static_select",
               "placeholder": {
                       "type": "plain_text", 
                       "text": "Option A", 
                       "emoji": true}, 
     "options": "[
                 {
                  "text": 
                        {"type": "plain_text", 
                         "text": "Option A",  
                         "emoji": true}
                 },
                 {"text": 
                        {"type": "plain_text", 
                         "text": "Option B", 
                         "emoji": true}
                 }
  ]", 
       
 "action_id": "NotificationSelect"}},

This causing Slack to fail. what am I doing wrong? If I am removing these quotation marks everything works fine.

Arkanosis · Accepted Answer · 2020-10-25 12:29:31Z

1

jsonData=json.dumps(data) is making a string from your list. Just use data directly instead of jsonData and you should be fine.

answered Oct 25, 2020 at 12:29

Arkanosis

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Comments

Amir Afianian · Accepted Answer · 2020-10-25 12:29:16Z

JSON data is wrapped inside "". That is why you are having two quotation marks for the value of the option key.

Try skipping the step where you do:

jsonData=json.dumps(data)

As such, you will have this:

xxdata = []
xxdata.append("Option A")
xxdata.append("Option B")
data=[]
for xx in xxdata:
    item = {"text": {
                        "type": "plain_text",
                        "text": xx,
                        "emoji": True
                    }}
    data.append(dict(item))

Then:

    {
    "type": "section",
    "block_id": "Settings1",
    "text": {
        "type": "mrkdwn",
        "text": ":gear: *MAIN*\nSelect your main group"
    },
    "accessory": {
        "type": "static_select",
        "placeholder": {
            "type": "plain_text",
            "text": "Option A",
            "emoji": True
        },
        "options": data,  # replace json with dict
        "action_id": "NotificationSelect"
    }

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