gimntut

spisok = []

def 1_step(message):
  global spisok
  spisok.append(...)

import json
# ... тут помещаем нашу строку в переменную s, например в цикле.
s = '2020.08.31-14.15.33: {"P1":{"Location1":{"X": 266225.40625,"Y": 501808.46875,"Z": 21883.58984375},"CLocation1":{"X": 266225.40625,"Y": 501808.46875,"Z": 21883.58984375},"Event": false,"ProfileName": "Player","UserId": "76561198968409999","HasImmortality": false},"P2":{"Location2":{"X": 265164.625,"Y": 499088.78125,"Z": 22396.548828125},"CLocation2":{"X": 265164.21875,"Y": 499089,"Z": 22396.548828125},"Event": false,"ProfileName": "player2","UserId": "76561197996445700"},"Weapon": "AKM","TimeOfDay": "15:17:20"}'
# теперь извлекаем 
players = json.loads(s.split(':', 1)[1].strip())
for index in ('P1', 'P2'):
    player = players[index]
    profile_name = players[index]['ProfileName']
    user_id=players[index]["UserId"]
    print(f'{index} {profile_name} ({user_id})')

window.set_project_data({'folders':[{'path': dirpath}]})