我正在尝试编写一个相当简单的程序,该程序使用tkinter GUI将数字转换为二进制。我遇到的问题是,当我输入一个较大的数字(例如1000),然后输入一个较小的数字(例如2)并单击Submit(提交)时,新的输出仅显示在旧的中间。在我使用的示例中,它看起来像“二进制中的1000 i 2是10 01000”
如何在显示新标签之前完全删除旧标签?
from tkinter import *
win = Tk()
def compute_binary():
user_num = binary_entry.get()
user_num = int(user_num)
binary_equivalent = ("{:b}".format(user_num))
binary_output = StringVar()
binary_output.set(str(user_num) + " in binary is " + binary_equivalent)
binary_label = Label(win, textvariable = binary_output)
binary_label.grid(row = 1, column = 1)
win.title("Number to Binary Converter")
win.geometry("450x75")
input_request = Label(win, text = "Input a number to\nconvert to binary:")
input_request.grid(row = 0, column = 0)
binary_entry = Entry(win)
binary_entry.grid(row = 0, column = 1)
entry_confirm = Button(win, text = "Submit", command = compute_binary)
entry_confirm.grid(row=0, column = 2)
win.mainloop()
您在每次转换中为结果重新创建新标签,并且新标签覆盖在先前标签的顶部。
您需要创建一次结果标签,并在每次转化中对其进行更新:
from tkinter import *
win = Tk()
def compute_binary():
user_num = binary_entry.get()
user_num = int(user_num)
binary_equivalent = ("{:b}".format(user_num))
binary_output.set("{} in binary is {}".format(user_num, binary_equivalent))
win.title("Number to Binary Converter")
win.geometry("450x75")
input_request = Label(win, text="Input a number to\nconvert to binary:")
input_request.grid(row=0, column=0)
binary_entry = Entry(win)
binary_entry.grid(row=0, column=1)
entry_confirm = Button(win, text="Submit", command=compute_binary)
entry_confirm.grid(row=0, column=2)
binary_output = StringVar()
binary_label = Label(win, textvariable=binary_output)
binary_label.grid(row=1, column=0, columnspan=3)
win.mainloop()