tkinter 中的单独窗口给出结果

Question

我一直在尝试制作一个简单的计算器，但我主要在两件事上苦苦挣扎。

1. 在 tkinter 中创建一个执行算术方程的函数
2. 在单独的窗口中显示结果

我尝试使用顶级小部件和 showMessagebox 在新窗口中显示结果，但它们都不起作用！

代码：

from Tkinter import *
import math
import tkMessageBox

class Calculator():

     def __init__(self,master):

          self.master = master
          self.master.configure(background='sky blue')
          self.master.geometry('650x420+350+225')

          self.master.title('Calculator')

          self.ini_velocity = DoubleVar()

          # here we start creating buttons and entry boxes
          self.m_label = Label(text='Calculator',fg = 'Navy', font=("Helvetica", 20,"bold italic"), bg='sky blue')
          self.m_label.pack()

          self.button1 = Button(self.master,text='Final velocity',fg='white',bg='dark green',bd =3, width=12, command= self.show_m)
          self.button1.place(x=52,y=155)

          self.label1=Label(self.master,text='''1. v = u + a*t

     Initial Velocity

     Acceleration

          Time ''', fg= 'Navy', font='Helvetica 10 bold',bg='sky blue')
          self.label1.place(x=0,y=30)

          self.e1= Entry(self.master, textvariable = self.ini_velocity, width=4,bd=2)
          self.e1.place(x=120, y=62)

          self.e2= Entry(self.master, width=4, bd=2)
          self.e2.place(x=120, y=92)

          self.e3=Entry(self.master, width=4,bd=2)
          self.e3.place(x=120, y=122)

     def my_calculation(self): # this function is to operate the calculation
          root2 = Toplevel(self.master)
          myGUI = result_window(root2)

     def my_quit(self):
          self.master.destroy()

     def myresault(self):
          self.a = self.ini_velocity.get()


class result_window ():
     def __init__(self,master):
          self.master = master
          self.master.configure(background='sky blue')
          self.master.geometry('250x175+150+125')
          self.master.title('resault')

          print (Calculator.self.e1.get())

     def F_velocity(self):
          ini_v = self.ini_velocity.get()
          print (ini_v)


          # end of button commands
def main():

     root = Tk()
     myGUIcalculator = Calculator(root)
     root.mainloop()

if __name__=='__main__':
     main()

Answer 1

对于单独的窗口，使用tkMessageBox（如您所想）。使用tkMessageBox.showinfo(title, message)。示例：

from Tkinter import *
import tkMessageBox

numbersandoperatorslist = "1 2 3 4 5 6 7 8 9 0 - + = / *".split(" ")

def operation(content):
    contentlist = []
    for char in range(len(content)):
        contentlist.append(char) # This might be useful later
        if char not in numbersandoperatorslist:
            tkMessageBox.showerror("Error", "Your operation has an undefined character.")
            return
    result = eval(content)
    tkMessageBox.showinfo("Result", str(result))

content 是您的操作。如果要添加/删除可接受的字符，只需编辑numbersandoperatorslist，不要忘记在字符之间添加空格。