[Python] Get json string from a python dict containing one or more list of strings into json, all list must be of same size

dict-of-lists-to-json.py

""" Get json string from a python dict containing lists of same size, see example at bottom of code """
import pyperclip

def dict_to_json(lists, cont=False, start_from=0):
    """ convert a list of strings to json """
    if cont:
        json = ''
    else:
        json = '{\n'
    keys = []
    for key in lists.items():
        keys.append(key[0])
    for i in range(0, len(lists[keys[0]])):
        json += '\t"'+str(i+start_from)+'": {\n\t\t"id": "'+str(i+start_from)+'",\n'
        for j in range(0, len(keys)):
            if j < len(keys)-1:
                json += '\t\t"'+keys[j]+'": "'+lists[keys[j]][i]+'",\n'
            else:
                json += '\t\t"'+keys[j]+'": "'+lists[keys[j]][i]+'"'
        json += '\n\t},\n'
    if not cont:
        json = json[:-2]
        json += '\n}'
    else:
        json += '\t'
    return json



# EXAMPLE
# dictionary can have any number of lists as long as they are of same size
MY_DICT = {
    "country": ["Afghanistan", "Albania", "Algeria",],
    "country_code": ["93", "355", "213",],
    "ISO_code": ["AF / AFG", "AL / ALB", "DZ / DZA",],
}

pyperclip.copy(dict_to_json(MY_DICT))
# see output string below, ready to be pasted into a json file

output.json

{
	"0": {
		"id": "0",
		"country": "Afghanistan",
		"country_code": "93",
		"ISO_code": "AF / AFG"
	},
	"1": {
		"id": "1",
		"country": "Albania",
		"country_code": "355",
		"ISO_code": "AL / ALB"
	},
	"2": {
		"id": "2",
		"country": "Algeria",
		"country_code": "213",
		"ISO_code": "DZ / DZA"
	}
}