Combine console script + GUI (tkinter)

[dejot]

Hello,
I have two python scripts. First is quickstart.py ans second is dater.py. My goal is to run first script and then inside call second script. I tried with sub-process but without success. The main problem is that window from tkinter runs twice. What does it mean? I am setting Start date and End date in calendar, then clicking Apply and at the end clicking X for closing windows. Right after close I am getting another same window which I need to close to go further with script. How to handle that?

import os
import base64
import subprocess

from functions import batch_vat
from dater import *
from google.auth.transport.requests import Request
from google.oauth2.credentials import Credentials
from google_auth_oauthlib.flow import InstalledAppFlow
from googleapiclient.discovery import build
from googleapiclient.errors import HttpError

# If modifying these scopes, delete the file token.json.
SCOPES = ["https://www.googleapis.com/auth/gmail.readonly"]


def main():
  """Shows basic usage of the Gmail API.
  Lists the user's Gmail labels.
  """
  creds = None
  # The file token.json stores the user's access and refresh tokens, and is
  # created automatically when the authorization flow completes for the first
  # time.
  if os.path.exists("token.json"):
    creds = Credentials.from_authorized_user_file("token.json", SCOPES)
  # If there are no (valid) credentials available, let the user log in.
  if not creds or not creds.valid:
    if creds and creds.expired and creds.refresh_token:
      creds.refresh(Request())
    else:
      flow = InstalledAppFlow.from_client_secrets_file(
          "credentials.json", SCOPES
      )
      creds = flow.run_local_server(port=0)
    # Save the credentials for the next run
    with open("token.json", "w") as token:
      token.write(creds.to_json())

  
  subprocess.run(["python", "dater.py"])

  start_date = start
  end_date = end
  
  #start_date = input("Start date[year/month/day]: ")
  #end_date = input("End date[year/month/day]: ")

  transformed_start_date = start_date.replace("/", "_")
  transformed_end_date = end_date.replace("/", "_")

  # Directory 
  directory = f"{transformed_start_date}-{transformed_end_date}"
  
  # Parent Directory path 
  parent_dir = "C:/Users/Dawid/Desktop/orlen"

  # Path 
  path = os.path.join(parent_dir, directory)
  #print(path)
  os.mkdir(path)
  print("## INFO ## Created directory", directory)
  #source = os. getcwd()
  #shutil.copy(f"{source}/read.py", f"{path}/read.py")
  

  
  try:
    # Call the Gmail API
    service = build("gmail", "v1", credentials=creds)
    results = service.users().messages().list(userId="me", labelIds="Label_1748439073231171664", q=f"after:{start_date} before:{end_date}").execute()
    messages = results.get("messages", [])

    #print(messages)

    #print(json.dumps(messages, indent = 1))

    licznik = 1

    for message in messages:
        message_id = message["id"]
        #print("Message ID = ", message_id)

        msg = service.users().messages().get(userId='me', id=message_id).execute()
        attachment_id = msg["payload"]["parts"][0]["body"]["attachmentId"]
        #print("Attachment ID: ", attachment_id)

        att = service.users().messages().attachments().get(userId='me', messageId=message_id, id=attachment_id).execute()
        attachment_data = att["data"]
        #print(json.dumps(attachment_data, indent = 1))

        file_data = base64.urlsafe_b64decode(attachment_data.encode('UTF-8'))
        
        filename = f"paliwo{licznik}.pdf"
        #print(filename)
        
        #path = os.path.join(store_dir + '\\' 'Downloaded files' + '\\' + filename)

        with open(f"{path}/{filename}", 'wb') as f:
            f.write(file_data)
            f.close()

        licznik = licznik + 1
    
    current_dir = os. getcwd()
    path_for_batch_vat=f"{current_dir}\\{directory}"
    print("## INFO ## Changing context to", path_for_batch_vat)
    os.chdir(path_for_batch_vat)
    print("## INFO ## Running VAT calculations")
    batch_vat(path_for_batch_vat)
        

  except HttpError as error:
    # TODO(developer) - Handle errors from gmail API.
    print(f"An error occurred: {error}")

if __name__ == "__main__":
  main()

from tkinter import *
import ttkbootstrap as tb

def get_dates():
    global start
    global end
    start = start_date.entry.get()
    end = end_date.entry.get()
    print("## INFO ## Start date: ", start)
    print("## INFO ## End date: ", end)
    return start, end
    
root = tb.Window(themename="solar")

root.title("Date picker!")
root.geometry("300x300")

start_date = tb.DateEntry(root, dateformat="%Y/%m/%d", firstweekday=0)
start_date_label = tb.Label(root, text="Start date:")

start_date.grid(column=1, row=0)
start_date_label.grid(column=0, row=0, pady=50, padx=20)


end_date = tb.DateEntry(root, dateformat="%Y/%m/%d", firstweekday=0)
end_date_label = tb.Label(root, text="End date:")

end_date.grid(column=1, row=1)
end_date_label.grid(column=0, row=1, padx=20)


my_button = tb.Button(root, text="Apply", command=get_dates, width=20)
my_button.place(x=80, y=200)


root.mainloop()