Input error correction.

[shakoun]

It is a pretty common task. Can you post the code that currently reads the user input where you want to catch and correct the error?

The following code takes the user input only as HH:MM otherwise an error occurs and the program stops.
I would like to allow the user to be able to re-enter the input without the program terminating.

import tkinter as tk
from tkinter import ttk
from tkinter.messagebox import showinfo

# root window
root = tk.Tk()
root.geometry("300x200")
root.resizable(False, False)
root.title('Time Clock')

# store StartofWork address and EndofWork
StartofWork = tk.StringVar()
EndofWork = tk.StringVar()


def login_clicked():
    """ callback when the login button clicked
    """
    WorkStart = StartofWork.get()
    tdelta = timediff()
    """
    msg = f'Start of Shift: {StartofWork.get()} and End of Shift: {EndofWork.get()}'
    """
    msg = f'Total Hours: {tdelta}'
    showinfo(
        title='Time Calculated',
        message=msg
    )

from datetime import datetime
def timediff():
  WorkStart = StartofWork.get()
  """StartTime = input("Enter Start Time in HH:MM\n") """
  print("This is WorkStart", WorkStart)
  print("This is EndofWork", EndofWork.get())
  FMT = '%H:%M'
  tdelta = datetime.strptime(EndofWork.get(), FMT) - datetime.strptime(StartofWork.get(), FMT)

  return tdelta
 
 # Sign in frame
signin = ttk.Frame(root)
signin.pack(padx=10, pady=10, fill='x', expand=True)


# StartofWork
StartofWork_label = ttk.Label(signin, text="Clock In:")
StartofWork_label.pack(fill='x', expand=True)

StartofWork_entry = ttk.Entry(signin, textvariable=StartofWork)
StartofWork_entry.pack(fill='x', expand=True)
StartofWork_entry.focus()

# EndofWork
password_label = ttk.Label(signin, text="Clock Out:")
password_label.pack(fill='x', expand=True)

password_entry = ttk.Entry(signin, textvariable=EndofWork)
password_entry.pack(fill='x', expand=True)

# login button
login_button = ttk.Button(signin, text="Calculate Time", command=login_clicked)
login_button.pack(fill='x', expand=True, pady=10)


root.mainloop()

Larz60+ write Jun-07-2024, 11:25 AM:
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