**或pow（）方法不支持的操作数类型：'method'和'int'

问题描述：

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（）方法不支持的操作数类型？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。我试图做一个程序，可以帮助您解决二次方程，并在底部dosent工作的一部分（DEF计算）感谢帮助我:)**或pow（）方法不支持的操作数类型：'method'和'int'

错误是指什么？ –

“计算”中的代码没有正确缩进。 –

答

您正在分配几个值：

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

，然后做算了一笔账：

d = two_b**2-...

然而，a.get是检索StringVar的值的方法。要实际调用它并检索该值，必须......用圆括号将其称为：

two_a = a.get()

此外，您将会有字符串。它们转换成整数或浮点数与int或float：

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

然后按照预期的算术会工作。

答

请阅读并研究有关mcves的SO帮助页面。这是一个基于你发布的代码的mcve。它在最后一行产生完全相同的错误信息。

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

提高功率的方法是荒谬的。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或在对算法进行算术运算之前将get的结果传递给float（）或int（）来执行后者。

**或pow（）方法不支持的操作数类型：'method'和'int'

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