add an array to a specific dictionary object

So I'm working on a dictionary to build a json schema. Using a recursive function which works pretty well when appending properties to these objects. However, I want to add an array to the object properties. So for this I've attached the following code as an example:

import json

dataProp = (
    ['airplane', 'fly'],
    ['car', 'drive'],
    ['boat', 'sail'],
    ['airplane', 'pilot'],
    ['car', 'driver'],
    ['boat', 'sailer']
)

dataReqProp = (
    ['airplane', 'fly'],
    ['boat', 'sail'],
    ['car', 'driver'],
    ['boat', 'sailer']
)

obj = {'transportation': {'airplane': {}, 'car': {}, 'boat': {}}}


def update_panel_json(obj, target_key, update_value, json_type):
    if isinstance(obj, dict):
        for key, value in obj.items():
            if key == target_key:
                obj[key].setdefault(json_type, {}).update(update_value)
            update_panel_json(value, target_key, update_value, json_type)

    elif isinstance(obj, list):
        for entity in obj:
            update_panel_json(entity, target_key, update_value, json_type)

for key, prop in dataProp:
    new_prop = {prop: {"type": "string"}}
    json_type = 'properties'
    update_panel_json(obj, key, new_prop, json_type)
    
for key, prop in dataReqProp:
    new_prop = {prop}
    json_type = 'required'
    update_panel_json(obj, key, new_prop, json_type)
    
# obj['transportation']['airplane']['required'] = ['test', 'test2','test3']

#Format dictionary to JSON format
jsonSchema = json.dumps(obj)
pretty_json = json.loads(jsonSchema)
print (json.dumps(pretty_json, indent=2))

In the code there are two arrays. The first array results in a list of objects in the dictionary. The second array contains the same objects but with only required properties. When doing this in the example I get the following error:

ValueError: dictionary update sequence element #0 has length 3; 2 is required

I know that this has something to do with giving more than one value to the update function of the array. However I want to get something like this:

in the required object for each separate object:

airplane object
"required": ["fly"]

boat object
"required": ["sail"]

and so on

In case there are more properties required for one object it should be added to this same array. For instance

boat object
    "required": ["sail","row"]

How do I resolve this error issue?