Python to create a simple version of the gadgets to calculate the number of days of the implementation of ideas

# -*- coding: utf-8 -*-
'''
@File: calc_day_v2.py
@Time: 2020/02/12 20:33:22
@Author: A Dream of Three Thousand Years
@Contact: yiluolion@
'''
# Put the import lib here
from tkinter import *
import  as messagebox
from tkinter import ttk
import calendar
class MyException(BaseException):
  ''' Custom Exception Classes
  '''
  def __init__(self, message):
     = message
def calculate(*args):
  ''' Method of calculating the number of days
  '''
  try:
    # Used to store days
    nums = 0
    # Get the data in the input box
    year, month, day = [int(elem) for elem in ().split('-')]
    # Judgment month, specified between 1-12
    if 1 <= month <= 12:
      # Iterate over the number of days
      for month_x in range(1, month + 1):
        # of days in a month calculated
        _, month_day = (year, month_x)
        # Iterate over months equal to the current month, regularizing the number of days
        if month_x == month:
          # Exception thrown if the number of days given in the text input box does not match
          if day > month_day:
            raise MyException("Information entered incorrectly, note the number of days!")
          continue
        nums += month_day
      nums += day
      # Set values to text boxes
      (nums)
      the_year.set(year)
    else: # Exception thrown for month out of range
      raise MyException("Wrong information input, pay attention to the month!")
  except MyException as e:
    (title="Error entering information.", message=e)
  except Exception as e:
    # print(e)
    (title="Error entering information.", message="The output is formatted incorrectly, enter it in a format like 2020-2-12. Note the month, the number of days!")
root = Tk()
("Counting days")
# Setting up the frame
mainframe = (root, padding="3 3 12 12")
(column=0, row=0, sticky=(N, S, E, W))
(0, weight=1)
(0, weight=1)
date = StringVar()
the_year = StringVar()
days = StringVar()
# Textbox widget layout
date_entry = (mainframe, width=10, textvariable=date)
date_entry.grid(column=2, row=1, sticky=(W, E))
# Layout of tabs and buttons
(mainframe, text="Example: 2020-2-12").grid(column=5, row=1, sticky=(W, E))
(mainframe, textvariable=days).grid(column=4, row=2, sticky=(W, E))
(mainframe, textvariable=the_year).grid(column=2, row=2, sticky=(W, E))
(mainframe, text="Calculate", command=calculate).grid(column=5, row=3)
(mainframe, text="Date:").grid(column=1, row=1, sticky=E)
(mainframe, text="This day is").grid(column=1, row=2, sticky=E)
(mainframe, text="The first of the year.").grid(column=3, row=2, sticky=E)
(mainframe, text="Heaven.").grid(column=5, row=2, sticky=W)
# Set inner margins
for child in mainframe.winfo_children():
  child.grid_configure(padx=5, pady=5)
date_entry.focus()
('<Return>', calculate)
()