Tkinter Text小部件:检索一行的第一个字符

import tkinter as tk

def get_first_character():
    text_content = text_widget.get("1.0", "end-1c")  # 获取Text小部件中的全部文本内容
    lines = text_content.splitlines()  # 按行分割文本内容
    first_characters = [line[0] for line in lines]  # 获取每一行的第一个字符
    print(first_characters)

root = tk.Tk()
text_widget = tk.Text(root)
text_widget.pack()

button = tk.Button(root, text="获取第一个字符", command=get_first_character)
button.pack()

root.mainloop()