LabelFrame first try

import tkinter as tk

class MyGui_ms(tk.Tk):
    def __init__(self):
        super().__init__()
        self.frm_msg = tk.Frame(self)
        self.title("SWT2/SE 2020 Mira Naima Schwarz 25.05.2020")
        # Labelframe links
        self.frm_msg_xy = tk.LabelFrame(self,
                                            text="Nachrichten senden und empfangen")
        # Widgets für Labelframe links
        # Initialisierung der Variable svar_msg_send_xy
        self.svar_msg_send_xy = tk.StringVar()
        self.svar_msg_send_xy.set(" ")
        # Eingabefeld für die Nachricht
        ety_msg_send_xy = tk.Entry(self.frm_msg_xy,
                                       textvariable=self.svar_msg_send_xy)
        # Button zum versenden der Nachricht
        btn_msg_send_xy = tk.Button(self.frm_msg_xy,text=">",
                                        command=self.on_click_send_btn)
        # Slider für Skalierung
        scl_val_send_xy = tk.Scale(self.frm_msg_xy,from_=-2, to=2, orient=tk.HORIZONTAL)
        # Ein/Aus Checkbutton
        # Initialisierung der Variablen bvar_sta_send_xy
        self.bvar_sta_send_xy = tk.BooleanVar()
        self.bvar_sta_send_xy.set(0)
        cbt_sta_send_xy = tk.Checkbutton(self.frm_msg_xy,
                                             variable=self.bvar_sta_send_xy,
                                             text="EIN/AUS")
        # Label Senden/Empfangen
        lbl_txt_recv_xy = tk.Label(self.frm_msg_xy,
                                       text="Senden/Empfangen")
        # Radio Buttons
        # Radio Button Client
        # Initialisierung von ivar_cos_xy
        self.ivar_cos_xy = tk.IntVar()
        self.ivar_cos_xy.set(0)
        rbt_client_xy = tk.Radiobutton(self.frm_msg_xy,
                                           text="Client",
                                           variable=self.ivar_cos_xy,
                                           value=0)
        # Radio Button Server
        rbt_server_xy = tk.Radiobutton(self.frm_msg_xy,
                                           text="Server",
                                           variable=self.ivar_cos_xy,
                                           value=1)
        # Labelframe rechts
        self.frm_ctp_cos_xy = tk.LabelFrame(self,"Client oder Server")
        # Widgets ablegen



        # Labelframe rechts unten
        # self.lbl = tk.Label(self.frm, text="hallo")
        # self.btn_msg_send_xy = tk.Button(self.frm,text="ok",width=30,command=self.on_click_btn)
        # self.frm.grid(row = 0, column = 0)
        # self.lbl.grid(row = 0,column = 0)
        # self.btn_msg_send_xy.grid(row=1,column=0)

    def on_click_send_btn(self):
        self.lbl_txt_recv_xy["text"] = "Entry Msg"

my_gui = MyGui_ms()
my_gui.mainloop()