您可以使用 tag_names 来获取某个索引处的标签列表.然后只需调用 tag_add 或 tag_remove 取决于当前单词上是否存在标签.

You can use tag_names to get a list of tags at a certain index. Then it's just a matter of calling tag_add or tag_remove depending on whether the tag is present on the current word or not.

示例:

import tkinter as tk

class Example(object):
    def __init__(self):
        self.root = tk.Tk()
        self.text = tk.Text(self.root)
        self.text.pack(side="top", fill="both", expand=True)
        self.text.bind("<ButtonRelease-1>", self._on_click)
        self.text.tag_configure("highlight", background="bisque")

        with open(__file__, "r") as f:
            self.text.insert("1.0", f.read())

    def start(self):
        self.root.mainloop()

    def _on_click(self, event):
        tags = self.text.tag_names("insert wordstart")
        if "highlight" in tags:
            self.text.tag_remove("highlight", "insert wordstart", "insert wordend")
        else:
            self.text.tag_add("highlight", "insert wordstart", "insert wordend")

if __name__ == "__main__":    
    Example().start()