Python 3 script to ASCII-encode a JSON file with UTF-8 data

json_utf8_to_ascii.py

#!/usr/bin/env python3
# Author: Sean Pesce

import json
import sys

def json_convert_utf8_to_ascii_file(in_fpath, out_fpath, include_encoding=False):
    b = b''
    with open(in_fpath, 'rb') as f:
        b = f.read()
    j = json.loads(b)
    if include_encoding:
        j['encoding'] = 'ascii'  # If you want to include encoding metadata
    with open(out_fpath, 'w') as f:
        json.dump(j, f, indent=2, ensure_ascii=True)   
    return

if __name__ == '__main__':
    if len(sys.argv) < 3:
        print(f'Usage:\n\t{sys.argv[0]} <UTF8 JSON input file> <ASCII JSON output file>')
        sys.exit()
    json_convert_utf8_to_ascii_file(sys.argv[1], sys.argv[2])