Example of writing a randomized roll call software in python

# -*- coding: utf-8 -*-
# @Time : 18-12-31 4:21pm
# @Author : Felix Wang

from tkinter import *
import  as tkFont
import random
import gc
import os, sys
import chardet
import copy
from threading import Thread
import time


def resource_path(relative):
  """
  Image path
  :param relative:
  :return.
  """
  if hasattr(sys, "_MEIPASS"):
    return (sys._MEIPASS, relative)
  return (relative)


def center_window(root, width, height):
  """
  Center size
  :param root: tk object
  :param width.
  :param height.
  :return.
  """
  screenwidth = root.winfo_screenwidth()
  screenheight = root.winfo_screenheight()
  size = '%dx%d+%d+%d' % (width, height, (screenwidth - width) / 2, (screenheight - height) / 2)
  (size)


def clear():
  (0, END)


def get_names():
  names = []
  name_path = (BASE_DIR, '')
  with open(name_path, 'rb') as f:
    data = ()
    cod = (data)['encoding']
    if 'gb' in str(cod):
      cod = 'gbk'
    for name in (cod).strip().split('\n'):
      if ():
        (())
    return names


class MyThread(Thread):
  def __init__(self):
     = False
    self.auto_choise = False
    self.is_auto = -1
    super().__init__()

  def run(self):
    while True:
      if self.is_auto is True:
        while :
          index = (0, len(names) - 1)
          echo["text"] = names[index]
          root.update_idletasks()
          (1 / 23 - 0.003)
        self.is_auto = -1
      elif self.is_auto is False:
        if self.auto_choise:
          ()
          self.is_auto = -1
      (0.1)

  def stop(self):
    """
    Action when clicking the stop button in a manual lottery
    :return.
    """
    if self.is_auto:
       = False
      button2["text"] = 'Manual lottery'
      pict['image'] = huaji_gif
      _name = (names)
      echo["text"] = _name
      (END, _name)
      root.update_idletasks()
      ()
      for x in locals().keys():
        del locals()[x]
      ()
      pict['image'] = huaji_gif
      ()

  def go(self):
    """
    Stop sign when starting manually
    :return.
    """
    if self.is_auto == -1:
      self.is_auto = True
       = True
      pict["image"] = huang_gif
      button2["text"] = 'Click to stop'

  def auto_start(self):
    """
    Automatically start setting change marks
    :return.
    """
    if self.is_auto == -1:
      self.is_auto = False
      self.auto_choise = True
      pict["image"] = huang_gif
      button["text"] = 'Don't light me up yet'
      global ft1
      ft1 = (family='Fixdsys', size=80, weight=)

  def auto(self):
    """
    Actions performed at the start of the autostart
    :return.
    """
    copy_names = (names)
    ren = int(())
    for i in range(ren):
      for a in range(23):
        index = (0, len(names) - 1)
        echo["text"] = (names)
        root.update_idletasks()
        (1 / 23 - 0.003)

      choise_name = copy_names.pop((range(len(copy_names))))
      echo["text"] = choise_name

      (END, choise_name)
      if i == ren - 1:
        pict['image'] = huaji_gif
        button["text"] = 'Start the lottery'
      for a in range(5):
        ()
        (0.06)

    root.update_idletasks()

    for x in locals().keys():
      del locals()[x]
    ()

    ()
    self.auto_choise = False


flag = False


def name2():
  global flag
  flag = not flag

  if flag:
    ()
  else:
    ()


def name():
  tr.auto_start()


try:
  BASE_DIR = ((__file__))

  names = get_names()

  root = Tk()

  ("lottery(by Wang Yitao (1942-), Chinese landscape painter and poet)")

  center_window(root, 570, 160)

  ft = (family='Fixdsys', size=40, weight=)
  ft1 = (family='Fixdsys', size=80, weight=)
  echo = Label(root, text='Random draw', font=ft, width=8) # Default display
  (row=1, column=1, columnspan=2)

  scrolly = Scrollbar(root)
  (row=1, column=5, rowspan=2, ipady=30)
  lb = Listbox(root, yscrollcommand=, exportselection=False, height=6)
  (row=1, column=3, rowspan=2, columnspan=2, pady=0)
  scrolly['command'] = 

  # button = Button(root, text='Delete selected name', command=lambda x=lb: (ACTIVE))
  # (row=3, column=3)
  button = Button(root, text='Delete all names', command=clear)
  (row=3, column=4)

  v = StringVar()
  Scale(root, from_=1, to=len(names), resolution=1, orient=HORIZONTAL, variable=v).grid(row=2, column=1, columnspan=2)

  # Pictures at the raffle
  data_dir = (BASE_DIR, "img")
  huaji_gif = PhotoImage(file=resource_path((data_dir, '')))
  huang_gif = PhotoImage(file=resource_path((data_dir, '')))
  pict = Label(root, image=huaji_gif)
  (row=1, column=0, rowspan=3)

  button = Button(root, text='Auto-draw', command=name)
  (row=3, column=1, columnspan=1)
  flag = False

  button2 = Button(root, text='Manual lottery', command=name2)
  (row=3, column=2, columnspan=1)

  tr = MyThread()
  (True)
  ()

  ()
except Exception as e:
  print('Error message', e)
  (60)