我目前正在尝试使用python在tkinter的帮助下构建一个GUI计算器。当我按下按钮时(例如:按钮5和5出现在条目())中,我设置了所有按钮,并与我的输入()栏互动。Python Tkinter条目()计算
剩下要做的唯一事情实际上是执行出现在entry()中的数学公式。例如,如果我在输入栏中输入5 + 5 * 2,我将如何在更新后将答案显示在条目()中?所以基本上我所要求的是有人帮助我做到这一点!
我已经提供了下面的代码和计算器的屏幕截图。另外,请不要将此举报为重复或将此问题标记为帖子,(我正在研究此问题,因为我对最后一个问题没有帮助,所以请帮助年轻的python程序员!)。另外我要求你不要给我提供链接,因为我已经阅读了tkinter上的每一个可能的链接,并且仍然不知道我在做什么。
这里是我的代码:
import sys
from tkinter import *
from PIL import Image, ImageTk
#ACTIONS:
def clear():
#Action: Clears the entry().
txtDisplay.delete(0,END);
return;
def update_Entry(inputValue):
#Updates the entry when a button is pressed.
currentText = num1.get();
update = num1.set(currentText + inputValue);
#Parent Window.
root = Tk();
root.title('Calculator ++ [1.7.2]');
root.geometry('350x450');
#Main entry.
num1 = StringVar();
txtDisplay = Entry(root, textvariable = num1, relief=RIDGE, bd = 10, width=33, insertwidth = 1, font = 40, justify=RIGHT);
txtDisplay.place(x=15, y=10);
txtDisplay.focus();
print(txtDisplay.get())
#Buttons:
zeroButton = Button(root, text='0', width=20, height=3, bg='LightBlue', fg='red', command=lambda:update_Entry('0'));
zeroButton.place(x=17,y=382);
oneButton = Button(root, text='1', width=8, height=3, bg='LightBlue', fg='red', command=lambda:update_Entry('1'));
oneButton.place(x=17, y=302);
twoButton = Button(root, text='2', width=8, height=3, bg='LightBlue', fg='red', command=lambda:update_Entry('2'));
twoButton.place(x=100, y=302);
threeButton = Button(root, text='3', width=8, height=3, bg='LightBlue', fg='red', command=lambda:update_Entry('3'));
threeButton.place(x=182, y=302);
fourButton = Button(root, text='4', width=8, height=3, bg='LightBlue', fg='red', command=lambda:update_Entry('4'));
fourButton.place(x=17, y=222);
fiveButton = Button(root, text='5', width=8, height=3, bg='LightBlue', fg='red', command=lambda:update_Entry('5'));
fiveButton.place(x=100, y=222);
sixButton = Button(root, text='6', width=8, height=3, bg='LightBlue', fg='red', command=lambda:update_Entry('6'));
sixButton.place(x=182, y=222);
sevenButton = Button(root, text='7', width=8, height=3, bg='LightBlue', fg='red', command=lambda:update_Entry('7'));
sevenButton.place(x=17, y=142);
eightButton = Button(root, text='8', width=8, height=3, bg='LightBlue', fg='red', command=lambda:update_Entry('8'));
eightButton.place(x=100, y=142);
ninthButton = Button(root, text='9', width=8, height=3, bg='LightBlue', fg='red', command=lambda:update_Entry('9'));
ninthButton.place(x=182, y=142);
decimalButton = Button(root, text='.', width=8, height=3, bg='powder blue', command=lambda:update_Entry('.'));
decimalButton.place(x=182, y=382);
equalButton = Button(root, text='=', width=8, height=8, bg='Lightgreen', command=lambda:update_Entry('='));
equalButton.place(x=264, y=307);
plusButton = Button(root, text='+', width=8, height=3, bg='gray', command=lambda:update_Entry('+'));
plusButton.place(x=264, y=222);
minusButton = Button(root, text='-', width=8, height=3, bg='gray', command=lambda:update_Entry('-'));
minusButton.place(x=264, y=142);
multiplyButton = Button(root, text='x', width=8, height=3, bg='gray', command=lambda:update_Entry('*'));
multiplyButton.place(x=264, y=66);
divideButton = Button(root, text='÷', width=8, height=3, bg='gray', command=lambda:update_Entry('/'));
divideButton.place(x=182, y=66);
clearButton = Button(root, text='Clear (CE)', width=20, height=3, command = clear, bg='Orange');
clearButton.place(x=17, y=66);
#Locks the parent windows size.
root.maxsize(350,450);
root.minsize(350,450);
#Parent window's background color:
root.configure(background = 'black');
root.mainloop();
截图:
要注意,你不需要在Python中你的行尾加分号。阅读[PEP 8](https://www.python.org/dev/peps/pep-0008/),学习像专家一样格式化Python。 – Kupiakos
@Kupiakos如果每行有多条语句,您将需要它们...... – nbro
@ChristopherWallace您不应该这样做。 – Kupiakos