Python Objects and Lists within Dictionary

Question

I'm pretty new to Python, so just working my way through understanding the data sets.

I'm having a little trouble producing the JSON output that is required for the API I am working with.

I am using

import json
json.load(data_file)

Working with Python dictionary and then doing

json.dump(dict, json_data)

My data needs to look like the following when it is output.

    {
  "event":{
    "id":10006,
    "event_name":"My Event Name",
  },
  "sub event":[

  ],
  "attendees":[
    {
      "id":11201,
      "first_name":"Jeff",
      "last_name":"Smith",
    },
    {
      "id":10002,
      "first_name":"Victoria",
      "last_name":"Baker",
    },
  ]
}

I have been able to create the arrays in python and dump to json, but I am having difficulty creating the event "object" in the dictionary. I am using the below:

attendees = ['attendees']
attendeesdict = {}
attendeesdict['first_name'] = "Jeff"
attendees.append(attendeesdict.copy())

Can anyone help me add the "event" object properly?

You're having difficulty with the Event object/dcit but your question seems to be about the Attendees dict. Please clarify. You probably will not be able to use .copy method here if done inside a loop, but you need to show more code so we can understand what you're actually attempting to implement, and how you're going abou it. — David Zemens
– David Zemens, Commented Oct 31, 2016 at 13:13
The code you have so far makes no sense anyway. There is no need to have the string 'attendees' as the first element in the attendees list. — Daniel Roseman
– Daniel Roseman, Commented Oct 31, 2016 at 13:13
It is difficult to understand what you are asking for. What is in you "data_file" ? please post its content. Your event seems to be a very simple dictionary so what is stopping you from doing a simple json_data["event"] = { "id":10006, "event_name":"My Event Name" } ? You will notice that Python dict/list and JSON are very much look-alike. — Guillaume
– Guillaume, Commented Oct 31, 2016 at 13:14

Hai Vu · Accepted Answer · 2016-10-31 13:22:26Z

1

In general, going from JSON to dictionary is almost no work because the two are very similar, if not identical:

attendees = [
    {
        "first_name": "Jeff"
        # Add other fields which you need here
    },
    {
        "first_name": "Victoria"
    }    
]

In this instance, attendees is a list of dictionaries. For the event:

event = {
    "id": 10006,
    "event_name": "My Event Name"
}

Putting it all together:

data = {
    "event": event,
    "sub event": [],
    "attendees": attendees
}

Now, you can convert it to a JSON object, ready to send to your API:

json_object = json.dumps(data)

answered Oct 31, 2016 at 13:22

Hai Vu

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1 Comment

CareFree Over a year ago

Thanks so much! This explained it perfectly for me, I was making things so overcomplicated by iterating through all the lists, python makes it so simple when you see it like this!

Patrick Haugh · Accepted Answer · 2016-10-31 13:17:07Z

1

Assuming you have built all the values elsewhere and now you're just putting them together:

result = {'event':event_dict, 'sub event':subevent_list, 'attendees':attendees_list}

answered Oct 31, 2016 at 13:17

Patrick Haugh

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Comments

zefciu · Accepted Answer · 2016-10-31 13:20:07Z

1

If you want just to statically create a nested dict, you can use a single literal. If you paste the JSON above into python code, you would get a valid dict literal.

edited Oct 31, 2016 at 13:20

answered Oct 31, 2016 at 13:13

zefciu

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Comments

Januka samaranyake · Accepted Answer · 2016-10-31 13:18:36Z

0

Construct your dicts and add like below

    {
      "event":"add your dict"
      "sub event":["add your dict"],
      "attendees":["add your dict"]
    }

answered Oct 31, 2016 at 13:18

Januka samaranyake

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