a simple python script for converting a csv to json, you can choose to use json, ujson or simplejson based on performance requirements

csv_to_json.py

# inspired from http://www.andymboyle.com/2011/11/02/quick-csv-to-json-parser-in-python/
# refactored for using in python-3
# Also added ability to change json lib easily within json, ujson, simplejson
# reference for performance comparison json, ujson, simplejson - of https://medium.com/dataweave/json-vs-simplejson-vs-ujson-2887b2c128b2

import csv  
import importlib

# you can use 'json', 'ujson' or 'simplejson'
json_lib_name = 'json'
json_lib = importlib.import_module(json_lib_name)
  
CSV_PATH = 'GIVE_YOUR_CSV_FILE_PATH_HERE.csv'
JSON_PATH = 'GIVE_YOUR_JSON_FILE_PATH_HERE.json'

# Do you want to pretty print the json ?
PRETTY_PRINT_JSON = True
JSON_INDENT = 4

f = open( CSV_PATH, 'r' )
# first row of csv is used as field names by DictReader  
reader = csv.DictReader(f)  

# Parse the CSV into JSON  
if PRETTY_PRINT_JSON:
  out = json_lib.dumps([ row for row in reader ], indent=JSON_INDENT)
else:
  out = json_lib.dumps([ row for row in reader ])
  
print("JSON parsed!")

# Save the JSON  
f = open( JSON_PATH, 'w')  
f.write(out)  
print('JSON saved to - "%s"' % JSON_PATH)