下記方法でできました!tekt.insertを利用すればよかったんですね。
python
1import tkinter as tk
2
3class Application(tk.Frame):
4 def __init__(self,master = None):
5 super().__init__(master)
6 master.title("テキストボックス内容の取得")
7 master.geometry("350x150")
8 self.pack()
9
10 self.create_widgets()
11 def create_widgets(self):
12 self.lb = tk.Label(self)
13 self.lb["text"] = "入力"
14 self.lb.pack(side = "top")
15 self.en= tk.Entry(self)
16 self.en.pack()
17 self.en.focus_set()
18 self.bt = tk.Button(self)
19 self.bt["text"] = "ボタン"
20 self.bt["command"] = self.print_txtval
21 self.bt.pack(side = "bottom")
22
23 #フレーム
24 self.fr = tk.Frame()
25 self.fr.pack()
26 self.sc = tk.Scrollbar(self.fr)
27 self.sc.pack(side = tk.RIGHT, fill = "y")
28 self.tx = tk.Text(self.fr, width = 20, height = 5)
29 self.tx.pack()
30 self.tx["yscrollcommand"] = self.sc.set
31 self.sc["command"] = self.tx.yview
32
33 def print_txtval(self):
34 val_en = self.en.get()
35 self.tx.insert(tk.END, val_en)
36 self.tx.insert(tk.END,'\n')
37
38root = tk.Tk()
39app = Application(root)
40app.mainloop()