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login(sammelstring) # Ruft die Funktion "login" auf und übergibt als einzigen Parameter semmelstring
result = login(name)  # Ruft die Funktion "login" auf, übergibt als einzigen Parameter "name" und bindet den Rückgabewert (return value) an den Namen result.

Code: Alles auswählen

import tkinter as tk
from tkinter import ttk, messagebox

class Application:
    def login(self, host, username, password):
        print(f"Attempting login for user: {username} at {host}")


class LoginWindow:
    def __init__(self, root, app):
        self.root = root
        self.app = app
        root.title("Login")
        root.resizable(False, False)
        pad = {"padx": 8, "pady": 6}

        frame = ttk.Frame(root)
        frame.grid(column=0, row=0, sticky="nsew")

        # Host
        ttk.Label(frame, text="Host:").grid(column=0, row=0, sticky="w", **pad)
        self.host_var = tk.StringVar(value="localhost")
        ttk.Entry(frame, textvariable=self.host_var, width=30).grid(column=1, row=0, **pad)

        # Username
        ttk.Label(frame, text="Username:").grid(column=0, row=2, sticky="w", **pad)
        self.user_var = tk.StringVar()
        ttk.Entry(frame, textvariable=self.user_var, width=30).grid(column=1, row=2, **pad)

        # Password
        ttk.Label(frame, text="Password:").grid(column=0, row=3, sticky="w", **pad)
        self.password_var = tk.StringVar()
        ttk.Entry(frame, textvariable=self.password_var, show="*", width=30).grid(column=1, row=3, **pad)

        # Buttons
        button_frame = ttk.Frame(frame)
        button_frame.grid(column=0, row=4, columnspan=2, pady=(6, 0))
        ttk.Button(button_frame, text="Connect", command=self.on_connect).grid(column=0, row=0, padx=4)
        ttk.Button(button_frame, text="Quit", command=root.destroy).grid(column=1, row=0, padx=4)

        # Status label
        self.status_var = tk.StringVar(value="")
        ttk.Label(frame, textvariable=self.status_var, foreground="blue").grid(column=0, row=5, columnspan=2, **pad)

        # store connection
        self.conn = None

    def on_connect(self):
        host = self.host_var.get().strip()
        user = self.user_var.get().strip()
        password = self.password_var.get()

        if not host or not user:
            messagebox.showwarning("Missing fields", "Please provide host and username.")
            return
        try:
            self.app.login(host, user, password)
        except Exception as e:
            messagebox.showerror("Login failed", str(e))

def main():
    app = Application()
    root = tk.Tk()
    _ = LoginWindow(root, app)
    root.mainloop()

if __name__ == "__main__":
    main()