Question

我要做什么：

带有tkinter的GUI，可以将摄氏温度转换为华氏温度。

正在发生的事情

窗口本身正在工作，但是当我尝试使用按钮调用calc函数时，它将返回错误：

Exception in Tkinter callback
Traceback (most recent call last):
  File "/usr/lib/python3.6/tkinter/__init__.py", line 1705, in __call__
    return self.func(*args)
TypeError: calc() missing 1 required positional argument: 'grausC'

我的代码：

from tkinter import *

janela = Tk()
janela.title("Conversao")
janela.geometry("600x600")

def calc(grausC):
    graus = float(grausC.get())
    Fahrenheit = (graus * 9/5 + 32)
    lb3=Label(janela, text=CalcF)
    lb3.place(x=200, y=200)


titulo=Label(janela, text="Conversao de Celsius para Fahrenheit", font=("Verdana 20 underline"))
titulo.place(x=20, y=20)

grausC = Entry(janela)
grausC.place(x=200,y=150)

lb1=Label(janela, text="Graus em Celsius:")
lb1.place(x=70, y=150)

lb2=Label(janela, text="Graus em Fahrenheit:")
lb2.place(x=70, y=200)

btn=Button(janela, text= "Calcular", command=calc) 
btn.place(x=100, y = 250)

janela.mainloop()

Answer 1

解决了我的问题。功能定义不正确。

def calc():
    graus = float(grausC.get())
    Fahrenheit = (graus * 9/5 + 32)
    FahrenheitS = str(Fahrenheit)
    lb3=Label(janela, text=FahrenheitS)
    lb3.place(x=200, y=200)

缺少1个必需的位置参数Tkinter库

1 个答案: