import csv
import json
csvfile = open('file.csv', 'r')
jsonfile = open('file.json', 'w')
fieldnames = 'FirstName', 'LastName', 'IDNumber', 'Message'
reader = csv.DictReader(csvfile, fieldnames)
for row in reader:
    json.dump(row, jsonfile)
jsonfile.write('\n')
Python CSV в JSON