Question

from tkinter import *
import math
import sys

def quit():
  root.destroy()

def a_b_c():
  print_a()
  print_b()
  print_c()
  calculation()
  return

def print_a():
  get_a = a.get()
  printing_a = Label(root, text=get_a).grid(row=8, column=1)
  return

def print_b():
  get_b = b.get()
  printing_b =Label(root, text=get_b).grid(row=12, column=1)
  return

def print_c():
  get_c = c.get()
  printing_c =Label(root, text=get_c).grid(row=16, column=1)
  return


root = Tk()
a = StringVar()
b = StringVar()
c = StringVar()

root.title('Solving Quadratic Equations')

quit_b = Button(root, text="quit",command=quit).grid(row=1, column=1)
go_b = Button(root, text="go", command=a_b_c).grid(row=1, column=2)
welcome = Label(root, text="Welcome to Solving Quadratic Equations with GlaDOS",font=("Helvetica",13))
welcome.grid(row=2, column=1)


instructions = Label(root, text="So how do i use this program? is what you may ask yourself. So, for example, \n you have the equation 2x^2+5x+8=0. So the 2x^2 is a but you don't put the\n whole thing in you just but the 2 from the start in. The next thing is b\n in this case b = 5 and c is equal to 8. Once you have all you number in the boxes \n hit the go button. Remember you don't need the x's. ", font=("Helvetica",11))
instructions.grid(row=3, column=1)

line = Label(root, text="************************************************************************************************************").grid(row=4, column=1)

input_a = Label(root, text="Pls input A here", font=("Helvetica",11)).grid(row=6, column=1)
entry_a = Entry(root,textvariable=a).grid(row=7,column=1)

line = Label(root, text="************************************************************************************************************").grid(row=9, column=1)

input_b = Label(root, text="Pls input B here", font=("Helvetica",11)).grid(row=10, column=1)
entry_b = Entry(root,textvariable=b).grid(row=11,column=1)

line = Label(root, text="*************************************************************************************************************").grid(row=13, column=1)
input_c = Label(root, text="Pls input C here", font=("Helvetica",11)).grid(row=14, column=1)
entry_c = Entry(root,textvariable=c).grid(row=15,column=1)

two_a = a.get
two_b = b.get
two_c = c.get

d = two_b**2-4*two_a*two_c
def calculation():
  if d < 0:
  no_solution = Label(root, text="This equation has no real solution").grid(row=19, column=1)
  elif d == 0:
  x = (-two_b+math.sqrt(two_b**2-4*two_a*two_c))/2*two_a
  one_solution = Label(root, text="This equation has one solutions: {}".format(x)).grid(row=20, column=1)
  else:
  x1 = (-two_b+math.sqrt((two_b**2)-(4*(two_a*two_c))))/(2*two_a)
  x1 = (-two_b-math.sqrt((two_b**2)-(4*(two_a*two_c))))/(2*two_a)
  two_solution= label(root, text="This equation has two solutions: {} or {} ".format(x1,x2)).grid(row=21, colum=1)

root.mainloop()

为什么说**或pow（）：method或int的操作数类型不受支持？有人可以帮助我改变它，所以它适用于学校，老师不能帮助我。我正在尝试制作一个程序，帮助您解决二次方程式和底部剂量工作的部分（def计算）谢谢你帮助我:)。

Answer 1

您正在指定一些值：

two_a = a.get
two_b = b.get
two_c = c.get

然后进行计算：

d = two_b**2-...

但是，a.get是一种检索StringVar值的方法。要实际调用它并检索值，你必须......好吧，用括号来调用它：

two_a = a.get()

此外，您将拥有字符串。使用int或float：

将它们转换为整数或浮点数

two_a = int(a.get())
# or:
two_a = float(a.get())

然后你的算术将按预期工作。

Answer 2

请阅读并研究此SO帮助页面mcves。这是基于您发布的代码的mcve。它在最后一行产生完全相同的错误消息。

import tkinter as tk
root = tk.Tk()
b = tk.StringVar(root)
two_b = b.get
d = two_b**2

将方法提升为权力是荒谬的。您需要调用（）方法并将字符串转换为数字。通过使用DoubleVar或IntVar而不是StringVar来执行后者，或者在对算术执行算术之前将get的结果传递给float（）或int（）。

**或pow（）不支持的操作数类型：'method'和'int'

2 个答案: