How to format the JSON?

I am trying to output json data from a pandas dataframe directly into dcc.store (plotly-dash component), which is the output with id ‘intermediate-value’. So, I made a dictionary, and I dumped the JSON. I keep getting this error:

Expected type: (<class 'tuple'>, <class 'list'>)
Received value of type <class 'str'>

I understand it says I am passing it a string, and that I should be passing it a tuple (or?) a list. What I am unsure of is how to edit my code to match the data structure it desires. Could anyone provide insight, I included my function in question below:

@app.callback(
    [
        Output('intermediate-value', 'data')
    ],
    [
        Input("keyword-selection", "value"),
        Input("status-selection", "value")
    ]
)
def color_map(keyword_selected, status_selected):
    local_df = df_xy_coord[df_xy_coord["active"] == status_selected].copy() if status_selected != "All" else df_xy_coord

    color_index = 0
    for keyword in keyword_selected:
        local_df.loc[local_df["keyword"] == keyword, 'color'] = colors[color_index]
        color_index += 1

    color_dictionary = dict( zip( local_df.keyword, local_df.color ) )
    return( json.dumps(color_dictionary, indent = 4) )

>Solution :

To return a tuple in Python (the comma is necessary for Python to parse it as a tuple of size 1):

return (color_dictionary,  )

To return a list in Python:

return [color_dictionary]

json.dumps serializes an object (e.g. a dict) to a JSON formatted str.
You can serialise your dict into a JSON string first and then return it inside a tuple or list following the examples above.
See docs for json.dumps here.