可以给程序加个注释吗？

帮忙给下面这段程序加个注释

ex_data = pd.read_excel('题目.xlsx') ##默认读取sheet = 0的
        head_list = list(ex_data.columns)
        list_dict = []
        for i in ex_data.values:
            list_dict.append(dict(zip(head_list,i)))
        
        drt=random.choice(list_dict)
        lbl11 = tkinter.Label(window, text=f"{drt['题目']}",bg="white")
        lbl11.place(x=20, y=20)

        def showselect():
        varlbl2.set(varR.get())
        varR = tkinter.StringVar()
        varR.set("Y")
        r1 = tkinter.Radiobutton(window, text=f"A． {drt['选项A']}", value="A",bg="white",variable=varR,command=showselect)
        r1.place(x=40,y=70)
        r2 = tkinter.Radiobutton(window, text=f"B． {drt['选项B']}", value="B",bg="white",variable=varR,command=showselect)
        r2.place(x=200,y=70)
        r3 = tkinter.Radiobutton(window, text=f"C． {drt['选项C']}", value="C",bg="white",variable=varR,command=showselect)
        r3.place(x=40,y=100)
        r4 = tkinter.Radiobutton(window, text=f"D． {drt['选项D']}", value="D",bg="white",variable=varR,command=showselect)
        r4.place(x=200,y=100)