Python Tkinter Calendar App

import tkinter as tk
from tkinter import ttk
from tkinter import filedialog
# Function to open a text file
def open_file():
    global current_file
    current_file = filedialog.askopenfilename(filetypes=[("Text Files", "*.txt")])
    load_appointments()

# Function to save appointments to the current text file
def save_file():
    if current_file:
        with open(current_file, 'w') as file:
            for date, appointment in appointments.items():
                file.write(f"{date}: {appointment}\n")

# Function to load appointments from the current text file
def load_appointments():
    if current_file:
        appointments.clear()
        with open(current_file, 'r') as file:
            for line in file:
                parts = line.strip().split(': ')
                if len(parts) == 2:
                    date, appointment = parts
                    appointments[date] = appointment
        update_calendar()

# Function to add or edit an appointment
def add_edit_appointment():
    date = date_var.get()
    appointment = appointment_entry.get()
    if date and appointment:
        appointments[date] = appointment
        update_calendar()
        save_file()
        clear_entry_fields()

# Function to clear date and appointment entry fields
def clear_entry_fields():
    date_var.set('')
    appointment_entry.delete(0, tk.END)

# Function to update the calendar display
def update_calendar():
    calendar_display.config(state=tk.NORMAL)
    calendar_display.delete(1.0, tk.END)
    for date, appointment in sorted(appointments.items()):
        calendar_display.insert(tk.END, f"{date}: {appointment}\n")
    calendar_display.config(state=tk.DISABLED)

# Create the main window
root = tk.Tk()
root.title("Calendar App")

# Create a Frame for file operations
file_frame = ttk.LabelFrame(root, text="File")
file_frame.pack(fill=tk.BOTH, expand=True, padx=10, pady=5)

# Open file button
open_button = ttk.Button(file_frame, text="Open File", command=open_file)
open_button.pack(side=tk.LEFT, padx=5)

# Save file button
save_button = ttk.Button(file_frame, text="Save File", command=save_file)
save_button.pack(side=tk.LEFT, padx=5)

# Create a Frame for adding/editing appointments
add_edit_frame = ttk.LabelFrame(root, text="Add/Edit Appointment")
add_edit_frame.pack(fill=tk.BOTH, expand=True, padx=10, pady=5)

# Date entry
date_label = ttk.Label(add_edit_frame, text="Date:")
date_label.grid(row=0, column=0, padx=5, pady=5)
date_var = tk.StringVar()
date_entry = ttk.Entry(add_edit_frame, textvariable=date_var)
date_entry.grid(row=0, column=1, padx=5, pady=5)

# Appointment entry
appointment_label = ttk.Label(add_edit_frame, text="Appointment:")
appointment_label.grid(row=1, column=0, padx=5, pady=5)
appointment_entry = ttk.Entry(add_edit_frame)
appointment_entry.grid(row=1, column=1, padx=5, pady=5)

# Add/Edit button
add_edit_button = ttk.Button(add_edit_frame, text="Add/Edit", command=add_edit_appointment)
add_edit_button.grid(row=2, columnspan=2, padx=5, pady=10)

# Create a Frame for displaying appointments
calendar_frame = ttk.LabelFrame(root, text="Calendar")
calendar_frame.pack(fill=tk.BOTH, expand=True, padx=10, pady=5)

# Calendar display
calendar_display = tk.Text(calendar_frame, wrap=tk.WORD, state=tk.DISABLED)
calendar_display.pack(fill=tk.BOTH, expand=True, padx=5, pady=5)

# Initialize global variables
current_file = None
appointments = {}

# Main loop
root.mainloop()