JSON to CSV converter in python code example

Example 1: python csv string to json

import json
import csv 
//string_data is your string in csv format
json.dumps(list(csv.DictReader(string_data.splitlines(), delimiter=",")))

Example 2: convert csv to json python

import pandas as pd
df = pd.read_csv (r'Path where the CSV file is saved\File Name.csv')
df.to_json (r'Path where the new JSON file will be stored\New File Name.json')

Example 3: nested json to csv python

import json
import csv
import requests

response = requests.get('https://statsapi.web.nhl.com/api/v1/teams')
json_data = response.json()

def get_leaves(item, key=None):
    if isinstance(item, dict):
        leaves = {}
        for i in item.keys():
            leaves.update(get_leaves(item[i], i))
        return leaves
    elif isinstance(item, list):
        leaves = {}
        for i in item:
            leaves.update(get_leaves(i, key))
        return leaves
    else:
        return {key : item}

# First parse all entries to get the complete fieldname list
fieldnames = set()

for entry in json_data:
    fieldnames.update(get_leaves(entry).keys())

with open('output.csv', 'w', newline='') as f_output:
    csv_output = csv.DictWriter(f_output, fieldnames=sorted(fieldnames))
    csv_output.writeheader()
    csv_output.writerows(get_leaves(entry) for entry in json_data)