![](/img/trans.png)
[英]Using the Tkinter radio-button widget for a GUI in my python application
[英]Can't get the value of a radio-button in Python/Tkinter
我正在编写一个简单的单位转换器,用户可以在其中从两个选项中选择他们想要转换的单位。 我正在使用单选按钮进行选择,但似乎无法让所选按钮的值在程序底部的条件下工作。
我尝试了这里关于堆栈溢出的几种解决方案,但都没有奏效。 有一次,我让 selected() 打印按钮的值,但在这种情况下它仍然不起作用。 我在这里遗漏了一些明显的东西吗? 请注意,转换器尚未完成,在解决此问题后,还有更多工作要做。
from tkinter import *
window = Tk()
window.title("Unit converter")
window.minsize(width=300, height=300)
window.config(padx=50, pady=50)
def lbs_kgs():
user_input = float(unit_A1.get())
result = round((user_input / 2.2046), 2)
unit_B1.config(text= f"{result}")
def mil_km():
user_input = float(unit_A1.get())
result = round((user_input * 1.6), 2)
unit_B1.config(text= result)
def selected():
return radio_state.get()
intro_label = Label(text = "What units would you like to convert?")
intro_label.grid(column=0, row=0, columnspan=4, pady=10)
radio_state = StringVar()
radiobutton1 = Radiobutton(text="Pounds to kilograms", value="pk", variable=radio_state, command=selected)
radiobutton2 = Radiobutton(text="Miles to kilometers", value="mk", variable=radio_state, command=selected)
radiobutton1.grid(column=0, row=1, columnspan=4)
radiobutton2.grid(column=0, row=2, columnspan=4)
instructions_label = Label(text = "Enter the number:")
instructions_label.grid(column=0, row=3, columnspan=4, pady=10)
unit_A1 = Entry(width=5)
unit_A1.grid(column=1, row=4, sticky="e")
unit_A1_label = Label(text = "unit A1")
unit_A1_label.grid(column=2, row=4, sticky="w")
equal_label = Label(text = "is equal to")
equal_label.grid(column=1, row=5, sticky="e")
unit_B1 = Label(text = "0")
unit_B1.grid(column=2, row=5, sticky="w")
unit_B1_label = Label(text = "result unit")
unit_B1_label.grid(column=3, row=5, sticky="w")
button = Button(text="Calculate")
button.grid(column=0, row=6, columnspan=4, pady=10)
if selected() == "pk":
button.config(command=lbs_kgs)
elif selected() == "mk":
button.config(command=mil_km)
window.mainloop()
将if/else
检查移动到selected
的 function 中,以便每次选择更改时都可以检查条件
def selected():
selection = radio_state.get()
if selection == "pk":
button.config(command=lbs_kgs)
elif selection == "mk":
button.config(command=mil_km)
声明:本站的技术帖子网页,遵循CC BY-SA 4.0协议,如果您需要转载,请注明本站网址或者原文地址。任何问题请咨询:yoyou2525@163.com.