计算器1：
From github
from tkinter import *
class calculate():
def __init__(self):
self.root = Tk()
self.root.title("Calculator")
self.root.geometry("290x260")
self.root.maxsize(290, 260)
self.root.minsize(290, 260)
self.root.config(bg="grey")
self.resultwindow = Entry(self.root,borderwidth=5, relief=SUNKEN)
self.resultwindow.grid(row=0,column=0,columnspan=6,pady=5)
self.resultwindow.config(font=("Arial", 18))
self.resultwindow.focus_set() # Sets focus on the input text area
# Buttons
self.button1 = Button(self.root, text="1", width=3, command=lambda:self.ins('1'),relief=RAISED,bg='light green')
self.button1.grid(row=1,column=0, padx=3, pady=3)
self.button1.config(font=("Arial", 18))
self.button2 = Button(self.root, text="2", width=3, command=lambda:self.ins('2'),relief=RAISED,bg='light green')
self.button2.grid(row=1, column=1, padx=3, pady=3)
self.button2.config(font=("Arial", 18))
self.button3 = Button(self.root, text="3", width=3, command=lambda:self.ins('3'),relief=RAISED,bg='light green')
self.button3.grid(row=1, column=2, padx=3, pady=3)
self.button3.config(font=("Arial", 18))
self.button4 = Button(self.root, text="4", width=3, command=lambda:self.ins('4'),relief=RAISED,bg='light green')
self.button4.grid(row=2, column=0, padx=3, pady=3)
self.button4.config(font=("Arial", 18))
self.button5 = Button(self.root, text="5", width=3, command=lambda:self.ins('5'),relief=RAISED,bg='light green')
self.button5.grid(row=2, column=1, padx=3, pady=3)
self.button5.config(font=("Arial", 18))
self.button6 = Button(self.root, text="6", width=3, command=lambda:self.ins('6'),relief=RAISED,bg='light green')
self.button6.grid(row=2, column=2, padx=3, pady=3)
self.button6.config(font=("Arial", 18))
self.button7 = Button(self.root, text="7", width=3, command=lambda:self.ins('7'),relief=RAISED,bg='light green')
self.button7.grid(row=3, column=0, padx=3, pady=3)
self.button7.config(font=("Arial", 18))
self.button8 = Button(self.root, text="8", width=3, command=lambda:self.ins('8'),relief=RAISED,bg='light green')
self.button8.grid(row=3, column=1, padx=3, pady=3)
self.button8.config(font=("Arial", 18))
self.button9 = Button(self.root, text="9", width=3, command=lambda:self.ins('9'),relief=RAISED,bg='light green')
self.button9.grid(row=3, column=2, padx=3, pady=3)
self.button9.config(font=("Arial", 18))
self.button0 = Button(self.root, text="0", width=3, command=lambda: self.ins('0'),relief=RAISED,bg='light green')
self.button0.grid(row=4, column=0, padx=3, pady=3)
self.button0.config(font=("Arial", 18))
self.button_open = Button(self.root, text="(", width=3, command=lambda: self.ins('('),relief=RAISED)
self.button_open.grid(row=4, column=1, padx=3, pady=3)
self.button_open.config(font=("Arial", 18))
self.button_close = Button(self.root, text=")", width=3, command=lambda: self.ins(')'),relief=RAISED)
self.button_close.grid(row=4, column=2, padx=3, pady=3)
self.button_close.config(font=("Arial", 18))
# Operations Buttons
self.buttonplus = Button(self.root, text="+", width=3, command=lambda:self.ins('+'),relief=RAISED)
self.buttonplus.grid(row=1, column=3, padx=3, pady=3)
self.buttonplus.config(font=("Arial", 18))
self.buttonminus = Button(self.root, text="-", width=3, command=lambda:self.ins('-'),relief=RAISED)
self.buttonminus.grid(row=1, column=4, padx=3, pady=3)
self.buttonminus.config(font=("Arial", 18))
self.buttondivide = Button(self.root, text="/", width=3, command=lambda:self.ins('/'),relief=RAISED)
self.buttondivide.grid(row=2, column=3, padx=3, pady=3)
self.buttondivide.config(font=("Arial", 18))
self.buttonmultiply = Button(self.root, text="*", width=3, command=lambda:self.ins('*'),relief=RAISED)
self.buttonmultiply.grid(row=2, column=4, padx=3, pady=3)
self.buttonmultiply.config(font=("Arial", 18))
self.buttoncancel = Button(self.root, text="C", width=3, command=lambda: self.cancel(),relief=RAISED,bg='#EF5350',fg='white')
self.buttoncancel.grid(row=3, column=4, padx=3, pady=3)
self.buttoncancel.config(font=("Arial", 18))
self.buttondeleteall = Button(self.root, text="Del", width=3, command=lambda: self.delete_all(),relief=RAISED)
self.buttondeleteall.grid(row=3, column=3, padx=3, pady=3)
self.buttondeleteall.config(font=("Arial", 18))
self.buttonresult = Button(self.root, text="=", width=7, command=lambda:self.calculate(),relief=RAISED,bg='#FFEE58')
self.buttonresult.grid(row=4, column=3, padx=3, pady=3, columnspan=2)
self.buttonresult.config(font=("Arial", 18))
self.root.mainloop()
def ins(self,val):
self.resultwindow.insert(END, val)
def cancel(self):
self.resultwindow.delete(0, 'end')
def delete_all(self):
x = self.resultwindow.get()
self.resultwindow.delete(0, 'end')
y = x[:-1]
self.resultwindow.insert(0, y)
def calculate(self):
x = self.resultwindow.get()
answer = eval(x)
self.resultwindow.delete(0, 'end')
self.resultwindow.insert(0, answer)
if __name__ == "__main__":
calculate()
计算器2
from tkinter import *
from tkinter import messagebox
calculator = Tk()
calculator.title("CALCULATOR")
calculator.resizable(0, 1)#remove or change this in order to get different screen sizes
class Application(Frame):
def __init__(self, master, *args, **kwargs):
Frame.__init__(self, master, *args, **kwargs)
self.createWidgets()
def replaceText(self, text):
self.display.delete(0, END)
self.display.insert(0, text)
def appendToDisplay(self, text):
self.entryText = self.display.get()
self.textLength = len(self.entryText)
if self.entryText == "0":
self.replaceText(text)
else:
self.display.insert(self.textLength, text)
def calculateExpression(self):#python's calculate function
self.expression = self.display.get()
self.expression = self.expression.replace("%", "/ 100")
try:
self.result = eval(self.expression)
self.replaceText(self.result)
except:
messagebox.showinfo("ERROR", "Invalid input", icon="warning", parent=calculator)
def clearText(self):#clears imput on pressing C on Calculator
self.replaceText("0")
def createWidgets(self):
self.display = Entry(self, font=("Helvetica", 16), borderwidth=0, relief=RAISED, justify=RIGHT)
self.display.insert(0, "0")
self.display.grid(row=0, column=0, columnspan=5)
#This is the First Row
self.sevenButton = Button(self, font=("Helvetica", 11), text="7", borderwidth=0, command=lambda: self.appendToDisplay("7"))
self.sevenButton.grid(row=1, column=0, sticky="NWNESWSE")
self.eightButton = Button(self, font=("Helvetica", 11), text="8", borderwidth=0, command=lambda: self.appendToDisplay("8"))
self.eightButton.grid(row=1, column=1, sticky="NWNESWSE")
self.nineButton = Button(self, font=("Helvetica", 11), text="9", borderwidth=0, command=lambda: self.appendToDisplay("9"))
self.nineButton.grid(row=1, column=2, sticky="NWNESWSE")
self.timesButton = Button(self, font=("Helvetica", 11), text="*", borderwidth=0, command=lambda: self.appendToDisplay("*"))
self.timesButton.grid(row=1, column=3, sticky="NWNESWSE")
self.clearButton = Button(self, font=("Helvetica", 11), text="C", borderwidth=0, command=lambda: self.clearText())
self.clearButton.grid(row=1, column=4, sticky="NWNESWSE")
#This is the Second Row
self.fourButton = Button(self, font=("Helvetica", 11), text="4", borderwidth=0, command=lambda: self.appendToDisplay("4"))
self.fourButton.grid(row=2, column=0, sticky="NWNESWSE")
self.fiveButton = Button(self, font=("Helvetica", 11), text="5", borderwidth=0, command=lambda: self.appendToDisplay("5"))
self.fiveButton.grid(row=2, column=1, sticky="NWNESWSE")
self.sixButton = Button(self, font=("Helvetica", 11), text="6", borderwidth=0, command=lambda: self.appendToDisplay("6"))
self.sixButton.grid(row=2, column=2, sticky="NWNESWSE")
self.divideButton = Button(self, font=("Helvetica", 11), text="/", borderwidth=0, command=lambda: self.appendToDisplay("/"))
self.divideButton.grid(row=2, column=3, sticky="NWNESWSE")
self.percentageButton = Button(self, font=("Helvetica", 11), text="%", borderwidth=0, command=lambda: self.appendToDisplay("%"))
self.percentageButton.grid(row=2, column=4, sticky="NWNESWSE")
#This is the Third Row
self.oneButton = Button(self, font=("Helvetica", 11), text="1", borderwidth=0, command=lambda: self.appendToDisplay("1"))
self.oneButton.grid(row=3, column=0, sticky="NWNESWSE")
self.twoButton = Button(self, font=("Helvetica", 11), text="2", borderwidth=0, command=lambda: self.appendToDisplay("2"))
self.twoButton.grid(row=3, column=1, sticky="NWNESWSE")
self.threeButton = Button(self, font=("Helvetica", 11), text="3", borderwidth=0, command=lambda: self.appendToDisplay("3"))
self.threeButton.grid(row=3, column=2, sticky="NWNESWSE")
self.minusButton = Button(self, font=("Helvetica", 11), text="-", borderwidth=0, command=lambda: self.appendToDisplay("-"))
self.minusButton.grid(row=3, column=3, sticky="NWNESWSE")
self.equalsButton = Button(self, font=("Helvetica", 11), text="=", borderwidth=0, command=lambda: self.calculateExpression())
self.equalsButton.grid(row=3, column=4, sticky="NWNESWSE", rowspan=2)
#This is the Fourth Row
self.zeroButton = Button(self, font=("Helvetica", 11), text="0", borderwidth=0, command=lambda: self.appendToDisplay("0"))
self.zeroButton.grid(row=4, column=0, columnspan=2, sticky="NWNESWSE")
self.dotButton = Button(self, font=("Helvetica", 11), text=".", borderwidth=0, command=lambda: self.appendToDisplay("."))
self.dotButton.grid(row=4, column=2, sticky="NWNESWSE")
self.plusButton = Button(self, font=("Helvetica", 11), text="+", borderwidth=0, command=lambda: self.appendToDisplay("+"))
self.plusButton.grid(row=4, column=3, sticky="NWNESWSE")
app = Application(calculator).grid()
calculator.mainloop()
计算器3
#!/usr/bin/python3
# Version 1 (21/08/2018)
#CalculatorGUI.py Code written by Harry Brenton - (www.raspibotics.wixsite.com/blog) for support
# Import tkinter library
from tkinter import *
from tkinter import messagebox
import math
# Here, we are creating our class, Window, and inheriting from the Frame
# class. Frame is a class from the tkinter module. (see Lib/tkinter/__init__)
class Window(Frame):
# Define settings upon initialization. Here you can specify
def __init__(self, master=None):
# Parameters that you want to send through the Frame class.
Frame.__init__(self, master)
self.master = master
self.init_window()
def init_window(self):
self.focus_set()
# Set Window Size
self.master.geometry("315x457")
# Force Window Size / Disable Maximise
self.master.resizable(0,0)
# Set window title
self.master.title("CalculatorGUI")
# Pack all widgets into window
self.pack(fill=BOTH, expand=1)
# Setup operation variable
operation = ""
self.operation = operation
operation2 = ""
self.operation2 = operation2
memory = - 0
self.memory = memory
# Setup number variables
num1 = 0
self.num1 = num1
num3 = 0
self.num3 = num3
# SETUP WIDGETS
message = lambda : messagebox.showinfo(title="About", message="A GUI Calculator coded in Python 3 by Harry Brenton")
message2 = lambda : messagebox.showinfo(title="Help", message="Go to: www.raspibotics.wixsite.com/blog")
menubar = Menu(self)
menubar.add_command(label="About", command=message) # About - menu
menubar.add_command(label="Help", command=message2)
# display the menu
root.config(menu=menubar)
# Configure Display widget
display = Entry(self, font=("Helvetica",36,"normal"), width=11)
display.configure(bg="white",fg="grey", relief="flat", state="readonly")
self.display = display
# Configure button_1 widget (7)
button_1 = Button(self, text="7", width=4, height=1,
command=self.button_1_handler, bg="lightgrey",
font=("Helvetica",20,"bold"))
button_1.configure(fg="white", relief="flat")
self.button_1 = button_1
# Configure button_2 widget (8)
button_2 = Button(self, text="8", width=4, height=1,
command=self.button_2_handler, bg="lightgrey",
font=("Helvetica",20,"bold"))
button_2.configure(fg="white", relief="flat")
self.button_2 = button_2
# Configure button_3 widget (9)
button_3 = Button(self, text="9", width=4, height=1,
command=self.button_3_handler, bg="lightgrey",
font=("Helvetica",20,"bold"))
button_3.configure(fg="white", relief="flat")
self.button_3 = button_3
# Configure button_ADD widget
button_ADD = Button(self, text="+", width=4, height=1,
command=self.button_ADD_handler, bg="grey",
font=("Helvetica",20,"bold"))
button_ADD.configure(fg="white", relief="flat")
self.button_ADD = button_ADD
# Configure button_PERC widget
button_PERC = Button(self, text="%", width=4, height=1,
command=self.button_PERC_handler, bg="grey",
font=("Helvetica",20,"bold"))
button_PERC.configure(fg="white", relief="flat")
self.button_PERC = button_PERC
# Configure button_SQUARE widget
button_SQUARE = Button(self, text="x²", width=4, height=1, #√
command=self.button_SQUARE_handler, bg="darkgrey",
font=("Helvetica",20,"bold"))
button_SQUARE.configure(fg="white", relief="flat")
self.button_SQUARE = button_SQUARE
# Configure button_ROOT widget
button_ROOT = Button(self, text="√", width=4, height=1,
command=self.button_ROOT_handler, bg="darkgrey",
font=("Helvetica",20,"bold"))
button_ROOT.configure(fg="white", relief="flat")
self.button_ROOT = button_ROOT
# Configure button_pi widget
button_pi = Button(self, text="π", width=4, height=1,
command=self.button_pi_handler, bg="darkgrey",
font=("Helvetica",20,"bold"))
button_pi.configure(fg="white", relief="flat")
self.button_pi = button_pi
# Configure button_4 widget
button_4 = Button(self, text="4", width=4, height=1,
command=self.button_4_handler, bg="lightgrey",
font=("Helvetica",20,"bold"))
button_4.configure(fg="white", relief="flat")
self.button_4 = button_4
# Configure button_5 widget (5)
button_5 = Button(self, text="5", width=4, height=1,
command=self.button_5_handler, bg="lightgrey",
font=("Helvetica",20,"bold"))
button_5.configure(fg="white", relief="flat")
self.button_5 = button_5
# Configure button_6 widget (6)
button_6 = Button(self, text="6", width=4, height=1,
command=self.button_6_handler, bg="lightgrey",
font=("Helvetica",20,"bold"))
button_6.configure(fg="white", relief="flat")
self.button_6 = button_6
# Configure button_SUB widget
button_SUB = Button(self, text="-", width=4, height=1,
command=self.button_SUB_handler, bg="grey",
font=("Helvetica",20,"bold"))
button_SUB.configure(fg="white", relief="flat")
self.button_SUB = button_SUB
# Configure button_7 widget (1)
button_7 = Button(self, text="1", width=4, height=1,
command=self.button_7_handler, bg="lightgrey",
font=("Helvetica",20,"bold"))
button_7.configure(fg="white", relief="flat")
self.button_7 = button_7
# Configure button_8 widget (8)
button_8 = Button(self, text="2", width=4, height=1,
command=self.button_8_handler, bg="lightgrey",
font=("Helvetica",20,"bold"))
button_8.configure(fg="white", relief="flat")
self.button_8 = button_8
# Configure button_9 widget (3)
button_9 = Button(self, text="3", width=4, height=1,
command=self.button_9_handler, bg="lightgrey",
font=("Helvetica",20,"bold"))
button_9.configure(fg="white", relief="flat")
self.button_9 = button_9
# Configure button_MUL widget
button_MUL = Button(self, text="x", width=4, height=1,
command=self.button_MUL_handler, bg="grey",
font=("Helvetica",20,"bold"))
button_MUL.configure(fg="white", relief="flat")
self.button_MUL = button_MUL
# Configure button_10 widget (0)
button_10 = Button(self, text="0", width=4, height=1,
command=self.button_10_handler, bg="lightgrey",
font=("Helvetica",20,"bold"))
button_10.configure(fg="white", relief="flat")
self.button_10 = button_10
# Configure button_11 widget (.)
button_11 = Button(self, text=".", width=4, height=1,
command=self.button_11_handler, bg="darkgrey",
font=("Helvetica",20,"bold"))
button_11.configure(fg="white", relief="flat")
self.button_11 = button_11
# Configure button_12 widget (C)
button_12 = Button(self, text="CE", width=4, height=1,
command=self.button_12_handler, bg="grey",
font=("Helvetica",20,"bold"))
button_12.configure(fg="white", relief="flat")
self.button_12 = button_12
# Configure button_DIV widget
button_DIV = Button(self, text="÷", width=4, height=1,
command=self.button_DIV_handler, bg="grey",
font=("Helvetica",20,"bold"))
button_DIV.configure(fg="white", relief="flat")
self.button_DIV = button_DIV
# Configure button_EQUALS widget
button_EQUALS = Button(self, text="=", width=18, height=1,
command=self.button_EQUALS_handler, bg="grey",
font=("Helvetica",20,"bold"))
button_EQUALS.configure(fg="white", relief="flat")
self.button_EQUALS = button_EQUALS
# Configure button_M+ widget (writes value to self.memory by additon of on display value)
button_MPLUS = Button(self, text="M+", width=4, height=1,
command=self.button_MPLUS_handler, bg="darkorange",
font=("Helvetica",20,"bold"))
button_MPLUS.configure(fg="white", relief="flat")
self.button_MPLUS = button_MPLUS
# Configure button_MR widget (reads self.memory)
button_MREAD = Button(self, text="MR", width=4, height=1,
command=self.button_MREAD_handler, bg="darkorange",
font=("Helvetica",20,"bold"))
button_MREAD.configure(fg="white", relief="flat")
self.button_MREAD = button_MREAD
# Configure button_M- widget (writes value to self.memory by subtraction of on display value)
button_MSUB = Button(self, text="M-", width=4, height=1,
command=self.button_MSUB_handler, bg="darkorange",
font=("Helvetica",20,"bold"))
button_MSUB.configure(fg="white", relief="flat")
self.button_MSUB = button_MSUB
# Configure button_MC widget (clears self.memory)
button_MCLEAR = Button(self, text="MC", width=4, height=1,
command=self.button_MCLEAR_handler, bg="darkorange",
font=("Helvetica",20,"bold"))
button_MCLEAR.configure(fg="white", relief="flat")
self.button_MREAD = button_MCLEAR
# Position Widgets
display.place(x=0, y=0)
button_1.place(x=0, y=173)#7
button_2.place(x=79, y=173) #8
button_3.place(x=158, y=173) #9
button_ADD.place(x=237, y=287)#+
button_4.place(x=0, y=230)#4
button_5.place(x=79, y=230)#5
button_6.place(x=158, y=230)#6
button_SUB.place(x=237, y=230)#-
button_7.place(x=0, y=287)#1
button_8.place(x=79, y=287)#2
button_9.place(x=158, y=287)#3
button_MUL.place(x=237, y=173)#x
button_10.place(x=79, y=344)#0
button_11.place(x=0, y=344)#.
button_12.place(x=0, y=116)#c
button_DIV.place(x=237, y=116)#/
button_EQUALS.place(x=0, y=401)#=
button_PERC.place(x=237, y=344)#%
button_SQUARE.place(x=79, y=116)
button_ROOT.place(x=158, y=116)
button_pi.place(x=158, y=344)#pi
button_MPLUS.place(x=158 , y=59)
button_MREAD.place(x=79 , y=59)
button_MSUB.place(x=237 , y=59)
button_MCLEAR.place(x=0 , y=59)
# EVENT HANDLERS
def button_1_handler(self):
self.display.configure(state="normal")
self.display.insert("end", "7")
self.display.configure(state="readonly")
def button_2_handler(self):
self.display.configure(state="normal")
self.display.insert("end", "8")
self.display.configure(state="readonly")
def button_3_handler(self):
self.display.configure(state="normal")
self.display.insert("end", "9")
self.display.configure(state="readonly")
def button_4_handler(self):
self.display.configure(state="normal")
self.display.insert("end", "4")
self.display.configure(state="readonly")
def button_5_handler(self):
self.display.configure(state="normal")
self.display.insert("end", "5")
self.display.configure(state="readonly")
def button_6_handler(self):
self.display.configure(state="normal")
self.display.insert("end", "6")
self.display.configure(state="readonly")
def button_7_handler(self):
self.display.configure(state="normal")
self.display.insert("end", "1")
self.display.configure(state="readonly")
def button_8_handler(self):
self.display.configure(state="normal")
self.display.insert("end", "2")
self.display.configure(state="readonly")
def button_9_handler(self):
self.display.configure(state="normal")
self.display.insert("end", "3")
self.display.configure(state="readonly")
def button_10_handler(self):
self.display.configure(state="normal")
self.display.insert("end", "0")
self.display.configure(state="readonly")
def button_11_handler(self):
self.display.configure(state="normal")
self.display.insert("end", ".")
self.display.configure(state="readonly")
def button_12_handler(self):
self.focus_set()
self.display.configure(state="normal")
self.display.delete(0,"end")
self.num1 = 0
self.num2 = 0
self.operation = ""
self.operation2 = ""
self.display.configure(state="readonly")
def button_pi_handler(self):
self.display.configure(state="normal")
self.display.insert("end", "3.141592653")
self.display.configure(state="readonly")
def button_MPLUS_handler(self):
self.display.configure(state="normal")
value = self.display.get()
value = float(value)
self.memory = value + self.memory
self.display.configure(state="readonly")
def button_MSUB_handler(self):
self.display.configure(state="normal")
value = self.display.get()
value = float(value)
self.memory = self.memory - value
self.display.configure(state="readonly")
def button_MREAD_handler(self):
self.display.configure(state="normal")
self.display.insert("end", self.memory)
self.display.configure(state="readonly")
def button_MCLEAR_handler(self):
self.display.configure(state="normal")
self.memory = 0
self.display.insert("end", self.memory)
self.display.configure(state="readonly")
def button_ADD_handler(self):
self.display.configure(state="normal")
# Sets the operation variable to the relevant choice - used in the EQUALS_HANDLER()
self.operation = "+"
# Gets user input from display
self.num1 = self.display.get()
# Clears the display
self.display.delete(0, "end")
# Prints the input
print(self.num1)
self.display.configure(state="readonly")
def button_SUB_handler(self): # See button_ADD_handler()
self.display.configure(state="normal")
self.operation = "-"
self.num1 = self.display.get()
self.display.delete(0, "end")
print(self.num1)
self.display.configure(state="readonly")
def button_PERC_handler(self): # See button_ADD_handler()
self.display.configure(state="normal")
self.operation2 = "%"
self.num3 = self.display.get()
print("percentage")
self.display.configure(state="readonly")
self.button_EQUALS_handler()
def button_SQUARE_handler(self): # See button_ADD_handler()
self.display.configure(state="normal")
self.operation = "square"
self.num1 = self.display.get()
self.display.delete(0, "end")
print("square")
self.display.configure(state="readonly")
self.button_EQUALS_handler()
def button_ROOT_handler(self): # See button_ADD_handler()
self.display.configure(state="normal")
self.operation = "root"
self.num1 = self.display.get()
self.display.delete(0, "end")
print("root")
self.display.configure(state="readonly")
self.button_EQUALS_handler()
def button_MUL_handler(self):
self.display.configure(state="normal")
self.operation = "*"
self.num1 = self.display.get()
self.display.delete(0, "end")
print(self.num1)
self.display.configure(state="readonly")
def button_DIV_handler(self):
self.display.configure(state="normal")
self.operation = "/"
self.num1 = self.display.get()
self.display.delete(0, "end")
print(self.num1)
self.display.configure(state="readonly")
def button_EQUALS_handler(self):
try:
carry_on = 0
self.display.configure(state="normal")
# Convert num1 to a float so mathematical operations can be applied
num1 = float(self.num1)
print(self.num1)
# Get info from display and store it in a variable
num2 = self.display.get()
num2 = float(num2)
print(num2)
# Create a variable to store result
except ValueError:
print("Needs a second Value")
result = 0
result = float(result)
self.num3 = float(self.num3)
self.num1 = float(self.num1)
if self.operation2 == "%" and self.operation == "-":
num3 = self.num3/100
num4 = self.num1*num3
result = self.num1-num4
carry_on = 1
elif self.operation2 == "%" and self.operation == "+":
num3 = self.num3/100
num4 = self.num1*num3
result = self.num1+num4
carry_on = 1
elif self.operation2 == "%" and self.operation == "*":
num3 = self.num3/100
num4 = self.num1*num3
result = self.num1*num4
carry_on = 1
elif self.operation2 == "%" and self.operation == "/":
num3 = self.num3/100
num4 = self.num1*num3
result = self.num1/num4
carry_on = 1
elif self.operation == "root":
num2 = math.sqrt(num1)
result = num2
elif self.operation == "square":
result = num1*num1
elif self.operation == "+": # Determine operation based on user input using if statments comparing self.operation
if carry_on == 0:
print("add")
result = num1 + num2 # Do the maths
print(result)
else:
print("carry on")
elif self.operation == "-":
if carry_on == 0:
print("subtract")
result = num1 - num2
print(result)
else:
print("carry on...")
elif self.operation == "*":
if carry_on == 0:
print("multiply")
result = num1 * num2
print(result)
else:
print("carry on...")
elif self.operation == "/":
if carry_on == 0:
# You cannot divide by zero - ZeroDivisionError Exception Handling
try:
print("divide")
result = num1 / num2
print(result)
except ZeroDivisionError:
print("You cannot divide by zero!")
result = "Error!"
else:
print("carry on...")
carry_on = 0
self.display.delete(0, "end")
self.display.insert("end", result) # Show the result
# Reset all variables
num1 = 0
num2 = 0
num3 = 0
num4 = 0
self.num1 = 0
self.num2 = 0
self.operation = ""
self.operation2 = ""
self.display.configure(state="readonly")
root = Tk() # Setup the tkinter window
# Create an instance - allows the window class to use tkinter
app = Window(root)
app.pack()
# Extra code for GUI goes between root - Tk() and mainloop() -
def key(event):
print("pressed", repr(event.char))
press = event.char
if press == "7":
app.button_1.configure(state=ACTIVE)
app.button_1_handler()
app.after(50, lambda: app.button_1.config(state=NORMAL))
elif press == "8":
app.button_2.configure(state=ACTIVE)
app.button_2_handler()
app.after(50, lambda: app.button_2.config(state=NORMAL))
elif press == "9":
app.button_3.configure(state=ACTIVE)
app.button_3_handler()
app.after(50, lambda: app.button_3.config(state=NORMAL))
elif press == "4":
app.button_4.configure(state=ACTIVE)
app.button_4_handler()
app.after(50, lambda: app.button_4.config(state=NORMAL))
elif press == "5":
app.button_5.configure(state=ACTIVE)
app.button_5_handler()
app.after(50, lambda: app.button_5.config(state=NORMAL))
elif press == "6":
app.button_6.configure(state=ACTIVE)
app.button_6_handler()
app.after(50, lambda: app.button_6.config(state=NORMAL))
elif press == "1":
app.button_7.configure(state=ACTIVE)
app.button_7_handler()
app.after(50, lambda: app.button_7.config(state=NORMAL))
elif press == "2":
app.button_8.configure(state=ACTIVE)
app.button_8_handler()
app.after(50, lambda: app.button_8.config(state=NORMAL))
elif press == "3":
app.button_9.configure(state=ACTIVE)
app.button_9_handler()
app.after(50, lambda: app.button_9.config(state=NORMAL))
elif press == "0":
app.button_10.configure(state=ACTIVE)
app.button_10_handler()
app.after(50, lambda: app.button_10.config(state=NORMAL))
elif press == ".":
app.button_11.configure(state=ACTIVE)
app.button_11_handler()
app.after(50, lambda: app.button_11.config(state=NORMAL))
elif press == "c":
app.button_12.configure(state=ACTIVE)
app.button_12_handler()
app.after(50, lambda: app.button_12.config(state=NORMAL))
elif press == "+":
app.button_ADD.configure(state=ACTIVE)
app.button_ADD_handler()
app.after(50, lambda: app.button_ADD.config(state=NORMAL))
elif press == "-":
app.button_SUB.configure(state=ACTIVE)
app.button_SUB_handler()
app.after(50, lambda: app.button_SUB.config(state=NORMAL))
elif press == "*":
app.button_MUL.configure(state=ACTIVE)
app.button_MUL_handler()
app.after(50, lambda: app.button_MUL.config(state=NORMAL))
elif press == "/":
app.button_DIV.configure(state=ACTIVE)
app.button_DIV_handler()
app.after(50, lambda: app.button_DIV.config(state=NORMAL))
elif press == "=":
app.button_EQUALS.configure(state=ACTIVE)
app.button_EQUALS_handler()
app.after(50, lambda: app.button_EQUALS.config(state=NORMAL))
elif press == "%":
app.button_PERC.configure(state=ACTIVE)
app.button_PERC_handler()
app.after(50, lambda: app.button_PERC.config(state=NORMAL))
def returnButton(event):
app.button_EQUALS.configure(state=ACTIVE)
app.button_EQUALS_handler()
app.after(50, lambda: app.button_EQUALS.config(state=NORMAL))
def clear(event):
app.button_12.configure(state=ACTIVE)
app.button_12_handler()
app.after(50, lambda: app.button_12.config(state=NORMAL))
app.focus_set()
app.bind("<Key>", key)
app.bind("<Return>", returnButton)
app.bind("<BackSpace>", clear)
while app.operation == "+":
print("hello there")
root.mainloop()
print("No don't leave!")