How to convert Json file to CSV in python

Question

I am new to python and I would like to convert below Json file to CSV file by using python. Please don't pass the whole json data in the code. Just pass the whole Json file in the code.

{
  "Breakfast": {
    "Brk_item1": "Milk",
    "Brk_item2": "Egg"
  },
  "Lunch": {
    "Lnc_item1": "Pasta",
    "Lnc_item2": "Sprouts"
  },
  "Dinner": {
    "Dnr_item1": "Pizza",
    "Dnr_item2": "Burger"
  }
},

{
  "Breakfast": {
    "Brk_item1": "Bread",
    "Brk_item2": "Butter"
  },
  "Lunch": {
    "Lnc_item1": "Indian Meal",
    "Lnc_item2": "Paratha"
  },
  "Dinner": {
    "Dnr_item1": "Roti",
    "Dnr_item2": "Paneer"
  }
}

and my expected output will be like below in CSV format

Brk_item1   Brk_item2   Lnc_item1   Lnc_item2   Dnr_item1   Dnr_item2

Milk        Egg         Pasta       Sprouts     Pizza       Burger

Bread       Butter      Indian Meal Paratha     Roti        Paneer

This is what I have tried so far:

import json
import csv
with open("./sample.json") as file:
  data = json.load(file)

fname="output.csv"

with open(fname,"w") as file:
    csv_file = csv.writer(file)
    csv_file.writerow ([ "Brk_item1","Brk_item2","Lnc_item1","Lnc_item2","Dnr_item1","Dnr_item2"])
    for item in data["Breakfast"]:
        csv_file.writerow([item["Brk_item1"],item["Brk_item2"],item["Lnc_item1"],item["Lnc_item2"],item["Dnr_item1"],item["Dnr_item2"]])

Answer 1

The first step is writting the header of file (you did it correctly).

csv_file = csv.writer(file)
csv_file.writerow (["Brk_item1","Brk_item2","Lnc_item1","Lnc_item2","Dnr_item1","Dnr_item2"])

If your loaded json array, it's an array of dicts, the next step is iterate the array elements for elem in data . So, in this step, each elem is a dict which has 3 elements: Breakfast , Lunch , Dinner . There all multiple ways to append the values, but as the element names of dicts are all different, and just are 3 elements and they are always the same, the easy way is to hardcode the values.

fname="output.csv"

with open(fname,"w") as file:
    csv_file = csv.writer(file)
    csv_file.writerow (["Brk_item1","Brk_item2","Lnc_item1","Lnc_item2","Dnr_item1","Dnr_item2"])
    for elem in data:
        csv_file.writerow([elem['Breakfast']['Brk_item1'],elem['Breakfast']['Brk_item2'],elem['Lunch']['Lnc_item1'], elem['Lunch']['Lnc_item2'], elem['Dinner']['Dnr_item1'],elem['Dinner']['Dnr_item2']])