How can the selected text be replaced with the idea?

To replace the selected text, you can follow these steps:

1. Get the starting and ending positions of the selected text.
2. Get the replacement text input by the user.
3. Insert the replacement text between the starting and ending positions.
4. Delete the original selected text.

Here is a Python example code that demonstrates how to use the Tkinter library to achieve this functionality.

from tkinter import Tk

def replace_selected_text():
    # 获取所选文本的起始位置和结束位置
    start = text_widget.index("sel.first")
    end = text_widget.index("sel.last")
    
    # 获取用户输入的替换文本
    replacement_text = replacement_entry.get()
    
    # 在起始位置和结束位置之间插入替换文本
    text_widget.insert(start, replacement_text)
    
    # 删除原始的所选文本
    text_widget.delete(start, end)

# 创建一个Tkinter窗口
window = Tk()

# 创建一个文本框
text_widget = Text(window)
text_widget.pack()

# 创建一个输入框，用于输入替换文本
replacement_entry = Entry(window)
replacement_entry.pack()

# 创建一个替换按钮
replace_button = Button(window, text="替换", command=replace_selected_text)
replace_button.pack()

# 运行Tkinter事件循环
window.mainloop()

This sample code creates a Tkinter window with a text box and an input box. Users can select text to replace in the text box and enter replacement text in the input box. After clicking the “Replace” button, the selected text will be replaced with the input replacement text.