Python script to convert plist data to JSON

plist2json.py

#! /usr/bin/env python3

"""Read a plist from stdin and write its JSON equivalent to stdout."""

import base64
import datetime
import json
import plistlib
import sys

# UID type (Python 3.8+)
UID = getattr(plistlib, 'UID', None)


def plist_json_default(obj):
    # Encode binary data as base64-encoded strings
    if isinstance(obj, (bytes, bytearray)):
        return base64.b64encode(obj).decode('ascii')
    # Encode datetimes as ISO 8601 strings
    # As with plistlib, datetimes are assumed to be in UTC
    if isinstance(obj, datetime.datetime):
        return '%04d-%02d-%02dT%02d:%02d:%02dZ' % (
            obj.year, obj.month, obj.day,
            obj.hour, obj.minute, obj.second
        )
    # Encode UIDs as integers
    if UID and isinstance(obj, UID):
        return obj.data
    raise TypeError(f'Object of type {obj.__class__.__name__} '
                    'is not JSON serializable')


if __name__ == '__main__':
    json.dump(plistlib.loads(sys.stdin.buffer.read()), sys.stdout,
              separators=(',', ':'), default=plist_json_default)