tchar

from typing import List
from threading import Thread, RLock, Event
import time
import uuid
import logging

logging.basicConfig(level=logging.INFO)
logger = logging.getLogger(__name__)

tchar

from typing import Any, Callable, Type
from functools import wraps


class Singleton(type):
    _instances = {}

    def __call__(cls: Type[Any], *args: Any, **kwargs: Any) -> Any:
        '''Gets as input the class and args/kwargs and returns either an already
        instantiated object or a new object from that class'''

tchar

function promisify(func, context) {
    return function(...p) {
        return new Promise(function(resolve, reject) {
            p.push(function(err, data) {
                if (err) {
                    reject(err)
                } else {
                    resolve(data)
                }
            })