** 或 pow() 不支持的操作数类型：“method”和“int”

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()

为什么它说**或 pow() 的操作数类型不受支持：方法或 int？有人可以帮我改变它，使它适用于学校，老师无法帮助我。我正在尝试制作一个程序来帮助您解决二次方程和底部剂量工作的部分（def 计算） 谢谢你帮助我:)

Answer 1

您正在分配几个值：

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，您必须......好吧，用括号调用它：

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())

那么你的算术将按预期工作。

Answer 2

请阅读并研究这个关于mcves 的 SO 帮助页面。 这是一个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

将方法提升到权力是荒谬的。您需要调用 () 方法并将字符串转换为数字。后者可以通过使用 DoubleVar 或 IntVar 而不是 StringVar 或在对其进行算术运算之前将 get 的结果传递给 float() 或 int() 来完成。