pyqt5 with pebble - Error of multiple UI instances

gistfile1.txt

import openpyxl
from functionalities.proxy_livetester import check_proxy
from PyQt5 import QtWidgets
import sys
from pebble import ProcessPool
from concurrent.futures import TimeoutError



class mywindow(QtWidgets.QMainWindow):
    group_id_col_number = -1
    def __init__(self):
        super(mywindow, self).__init__()
        uic.loadUi(r'ui_Files/IAM_MainUI.ui', self)

        self.data_reload_button_2.clicked.connect(self.testfunc)

    def proxy_checkers(self,proxy_dict):
        # checks all the proxies working status and returns good proxies
        proxies_thread = []
        working_proxies = []
        proxy_timeout_limit = 100
        with ProcessPool() as pool:
            for x in proxy_dict:
                proxies_thread.append(pool.submit(check_proxy, proxy_timeout_limit, x))

            proxy_failcount = 0
            for i, single_proxy_thread in enumerate(proxies_thread):
                try:
                    proxy_status = single_proxy_thread.result()
                    # print(type(proxy_status), proxy_status)
                except TimeoutError:
                    print("Proxy Failed %s" % single_proxy_thread)
                    proxy_failcount += 1

                if (type(proxy_status) == str): proxy_status = proxy_status.split('|')
                if proxy_status[1] != 'None':
                    working_proxies.append(proxy_status[0])
                else:
                    proxy_failcount += 1
                # print(working_proxies)
        print("Total Working Proxies:", len(working_proxies), "Total Failed Proxies:", proxy_failcount)
        return working_proxies

    def proxies(self,proxy_file):
        wb_obj = openpyxl.load_workbook(proxy_file)
        sheet_obj = wb_obj.active
        max_col = sheet_obj.max_column
        max_row = sheet_obj.max_row
        proxy_dic = {}
        for i in range(1, max_row + 1):
            proxy_id = sheet_obj.cell(row=i, column=1)
            proxy_reset = sheet_obj.cell(row=i, column=2)
            proxy_dic[proxy_id.value] = proxy_reset.value
        return proxy_dic


    def testfunc(self):
        proxy_file = r'C:\Bots\Instagram\src\proxies\selected_proxy.xlsx'
        proxy_dictionary=self.proxies(proxy_file)
        self.proxy_checkers(proxy_dictionary)

app = QtWidgets.QApplication([])
application = mywindow()
application.show()
sys.exit(app.exec())