Question

我正在尝试制作一个简单的计算器，通过使用带有GUI的Python 2.7.10来提供正方形和平方根但是它不起作用我无法弄清楚问题是什么。我收到此错误：

enum Gchord{G=1,B,D,};
int main(){
    printf( "What interval is G in the G chord triad \nEnter 1 2 or 3\n" );  
    int note;
    scanf("%i",&note);    

    if (note = 1 ){                 
        printf ("Yes G is %ist note in the G-chord\n",G )};
    else(
        printf("no, wrong");     
    return(0):       
};

> Exception in Tkinter callback Traceback (most recent call last): File
> "C:\Python27\lib\lib-tk\Tkinter.py", line 1536, in call return
> self.func(*args) File "C:/Users/Ali/Desktop/simplecalc.py", line 5, in
> do_sqrt root = x**0.5 TypeError: unsupported operand type(s) for ** or
> pow(): 'str' and 'float'

Answer 1

行x = number_input.get()将返回一个字符串，但您尝试将其用作数字。请改用第x = float(number_input.get())行。如果您包含错误打印输出，那就很清楚了：

TypeError: unsupported operand type(s) for ** or pow(): 'str' and 'float'

此外，避免全局变量会好得多，但这是另一天的另一个问题。

Answer 2

您正在从条目中读取字符串并尝试执行一些数学运算。而且你没有使用根和方变量。

import Tkinter
import tkMessageBox


def do_sqrt():
    root = float(number_input.get())**0.5
    tkMessageBox.showinfo("Square Root = ", root)


def do_square():
    square = float(number_input.get())**2
    tkMessageBox.showinfo("Square = ", square)

main_window = Tkinter.Tk()
main_window.title("Simple Calc")
number_input = Tkinter.Entry(main_window)
button_sqrt = Tkinter.Button(main_window, text="Square Root", command=do_sqrt)
button_sqrt.pack()
button_square = Tkinter.Button(main_window, text="Square", command=do_square)
button_square.pack()
number_input.pack()

main_window.mainloop()

使用python gui tkinter的简单的计算器

2 个答案: