Create identically named JSON object and array using python [duplicate]

I try to achieve the following using the default python encoder:

{
   "x": {
      "name": "value" 
   },
   "x": [
      {
         "other_name": "other_value"
      }
   ]
}

My current JSON skills allow the following

import json

data = {}

data["x"] = {}
data["x"]["name"] = "value"

y = {}
y["other_name"] = "other_value"
data["x"] = [y]

print(json.dumps(data))

which of course only results in

{
  "x": [
    {
      "other_name": "other_value"
    }
  ]
}

How can I get an output that contains a JSON object and an identically named array (here "x")?

Answer

I think that in JSON, you cannot have duplicate keys at the same level of an object. that each key in a JSON object must be unique.