json string format done differently-CodePudding

I have 2 lists - dates and weekdays

>>> dates
['2022-02-08', '2022-02-09', '2022-02-10', '2022-02-11', '2022-02-12', '2022-02-13', '2022-02-14', '2022-02-15']
>>> weekdays
['Tuesday', 'Wednesday', 'Thursday', 'Friday', 'Saturday', 'Sunday', 'Monday', 'Tuesday']

I want to create a json object that looks like this (for eg) for each element in dates.

myjson = {"label": "Tuesday-2022-02-08", "value": "/inform_date{\"date_list\": \"2022-02-08\"}"}

Basically I want to run a loop where myjson looks like what is given above.

data = []
for i in range(len(dates)):
  myjson = {"label": "{0}-{1}".format(weekdays[i], dates[i]), "value": "/inform_date{\"date_list\": \"{}\"}".format(dates[i])}
  data.append(myjson)

but I get an error when I run the above for loop.

What is the correct way to build myjson so that it looks just like shown in the example above?

CodePudding user response：

Your second format string has 'spare' braces which need to be escaped:

myjson = {"label": "{0}-{1}".format(weekdays[i], dates[i]), "value": "/inform_date{{\"date_list\": \"{}\"}}".format(dates[i])}

CodePudding user response：

Use a comprehension and f-strings:

import json

data = [{'label': f"{w}-{d}", 'value': f'/inform_date{{"date_list": {d}}}'}
            for d, w in zip(dates, weekdays)]
print(json.dumps(data, indent=4))

[
    {
        "label": "Tuesday-2022-02-08",
        "value": "/inform_date{\"date_list\": 2022-02-08}"
    },
    {
        "label": "Wednesday-2022-02-09",
        "value": "/inform_date{\"date_list\": 2022-02-09}"
    },
    {
        "label": "Thursday-2022-02-10",
        "value": "/inform_date{\"date_list\": 2022-02-10}"
    },
    {
        "label": "Friday-2022-02-11",
        "value": "/inform_date{\"date_list\": 2022-02-11}"
    },
    {
        "label": "Saturday-2022-02-12",
        "value": "/inform_date{\"date_list\": 2022-02-12}"
    },
    {
        "label": "Sunday-2022-02-13",
        "value": "/inform_date{\"date_list\": 2022-02-13}"
    },
    {
        "label": "Monday-2022-02-14",
        "value": "/inform_date{\"date_list\": 2022-02-14}"
    },
    {
        "label": "Tuesday-2022-02-15",
        "value": "/inform_date{\"date_list\": 2022-02-15}"
    }
]