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This repository was archived by the owner on Dec 22, 2023. It is now read-only.

Commit 64f2723

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Merge pull request #563 from lavish619/Scientific_calculator
Scientific Calculator GUI Added
2 parents f43ec98 + a9acc62 commit 64f2723

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# Scientific-Calculator-GUI-Tkinter
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Scientific and Standard Calculator combined, made in python using Tkinter module based on GUI.
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The Calculator is built in such a way that it first allows the user to enter the expression or the complete equation just like an actual scientific calulator in your device and then on pressing the equalto button , it shows the result.
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**Note:** Put Proper Paranthesis while writing the complete expression in Calculator.
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## Modules Required
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Python3
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(No external library or module needed)
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## How To Open
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Simply open the python file, Scientific_Calculator.py
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## Screenshot
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![alt text](https://github.com/lavish619/Python_and_the_Web/blob/master/Scripts/Miscellaneous/Scientific_Calculator_GUI/Screenshots/Screenshot-scientific.jpg?raw=true)
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#import Gui Package and libraries
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import tkinter.font
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from tkinter import *
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import math
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def clearall():
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'''Clear function toclear the screen
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and reset all variables'''
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global expression
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global equation
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global value
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global ans
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expression=''
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value=''
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ans=''
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equation.set(expression)
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def sgn(a):
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#Signum function
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return 1 if a>0 else -1 if a<0 else 0
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def clearback():
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'''Backspace button function to delete
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a character from the screen'''
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result1=""
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result2=""
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global equation
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global expression
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global value
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global ans
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expression = area.get()
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temp1= list(expression)
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temp2= list(value)
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if value=='':
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temp1=[]
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temp2=[]
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elif expression[-5:] in ["asin(","acos(","atan("]:
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for _ in range(5):temp1.pop()
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for _ in range(10):temp2.pop()
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elif expression[-4:]=="log(":
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for _ in range(4):temp1.pop()
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for _ in range(11):temp2.pop()
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elif expression[-4:] in ['sin(','cos(','tan(']:
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for _ in range(4): temp1.pop()
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for _ in range(9): temp2.pop()
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elif expression[-4:]=='sgn(':
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for _ in range(4): temp1.pop()
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for _ in range(4): temp2.pop()
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elif expression[-3:]=='ln(':
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for _ in range(3):temp1.pop()
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for _ in range(9): temp2.pop()
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elif expression[-2:]=='e^':
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for _ in range(2):temp1.pop()
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for _ in range(8): temp2.pop()
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elif expression[-1]=='^':
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for _ in range(1):temp1.pop()
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for _ in range(2): temp2.pop()
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elif expression[-1]=="√":
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for _ in range(1):temp1.pop()
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for _ in range(10):temp2.pop()
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elif expression[-1]=='π':
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for _ in range(1):temp1.pop()
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for _ in range(7): temp2.pop()
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elif expression[-1]=='e':
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for _ in range(1):temp1.pop()
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for _ in range(6): temp2.pop()
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elif expression[-1]=='%':
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for _ in range(1):temp1.pop()
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for _ in range(4): temp2.pop()
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else:
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temp1.pop()
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temp2.pop()
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for element in range(len(temp1)):
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result1+=temp1[element]
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expression = result1
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equation.set(expression)
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for element in range(len(temp2)):
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result2+=temp2[element]
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value=result2
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try:ans = str(eval(value))
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except:pass
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def pressbtn(num):
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'''Function to determine which button is pressed.
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Everytime a button a pressed , this function is
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called and a parameter is passed, which updates the
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variables and the expression to be evaluated'''
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global expression
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global value
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global ans
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expression = expression + str(num)
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equation.set(expression)
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if num in ["1","2","3","4","5","6","7","8","9","0","(",")","00"]:
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value += num
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try:ans = str(eval(value))
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except:ans = "Invalid Expression"
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elif num in ["+",'-','/','*','.','1/','sgn(']:
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value += num
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elif num in ['asin(','acos(','atan(','sin(','cos(','tan(']:
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value += 'math.'+ num
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elif num=='^':value += '**'
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elif num=='%':
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value += '/100'
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try:ans = str(eval(value))
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except:ans = "Invalid Expression"
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elif num=='^2':
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value += '**2'
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try:ans = str(eval(value))
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except:ans = "Invalid Expression"
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elif num=='^3':
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value += '**3'
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try:ans = str(eval(value))
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except:ans = "Invalid Expression"
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elif num=='√(':value += 'math.sqrt('
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elif num=='e':
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value += 'math.e'
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try:ans = str(eval(value))
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except:ans = "Invalid Expression"
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elif num=='π':
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value += 'math.pi'
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try:ans = str(eval(value))
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except:ans = "Invalid Expression"
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elif num=='log(':value += 'math.log10('
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elif num=='ln(':value += 'math.log('
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elif num=='e^':value += 'math.e**'
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def equal():
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'''On pressing equal to button, this function is called.
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And it prints the result on the screen.'''
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global ans
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global value
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global expression
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if value=="":
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ans=""
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equation.set(ans)
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ans=''
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value=''
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expression=''
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#Configuring the layout of Calculator
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root=Tk()
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root.title("Scientific Calculator")
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root.resizable(False,False)
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cal= Frame(root)
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cal.grid()
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cal.configure(bg="burlywood4")
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equation=StringVar()
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area = Entry(cal, textvariable = equation,width= 60, font= ("Comic Sans MS", 15),bd=10 ,justify=LEFT,state=DISABLED,
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disabledbackground="white",disabledforeground="black")
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area.insert(0,"0")
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area.grid(row=0,columnspan=8)
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#standard calculator
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def standard():
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root.geometry('361x350')
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area['width']=28
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area.grid(row=0,columnspan=4,sticky= EW)
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root.title("Standard Calculator")
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#scientific calculator
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def scientific():
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root.geometry('742x350')
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area['width']=60
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area.grid(row=0,columnspan=8)
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root.title("Scientific Calculator")
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# adding menubar on top
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menubar = Menu(cal)
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filemenu= Menu(menubar,tearoff=0)
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menubar.add_cascade(label="File", menu=filemenu)
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filemenu.add_command(label= "Standard", command= standard)
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filemenu.add_separator()
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filemenu.add_command(label="Scientific", command= scientific)
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root.config(menu=menubar)
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value=""
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ans=""
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expression=""
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#Fonts and Colours
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font= tkinter.font.Font(size=12,weight= "bold", family='Helvetica',)
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h=2
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w=7
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actvbgnd='white'
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bg1='wheat3'
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bg2="burlywood1"
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bg3="burlywood2"
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bg4= "tan1"
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fg1= "white"
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fg2="black"
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numberpad = [7,8,9,4,5,6,1,2,3]
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i=0
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for j in range(3):
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for k in range(3):
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Button(cal,command = lambda x = str(numberpad[i]) : pressbtn(x), text = str(numberpad[i]), bg= bg1, fg=fg2,activebackground=actvbgnd,
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height=h, width=w,font= font).grid(row=j+2,column=k)
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i+=1
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r=5 #number of rows
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c=7 #number of columns
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#creating buttons
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Button(cal,command = lambda: pressbtn(0), text = "0", bg= bg1, fg=fg2,activebackground=actvbgnd,
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height=h, width=w,font= font).grid(row=r,column= c-7)
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Button(cal,command = lambda: pressbtn('00'),text = "00", bg= bg1, fg=fg2,activebackground=actvbgnd,
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height=h, width=w,font= font).grid(row=r,column= c-6)
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Button(cal,command = clearback, text = "C", bg= bg2, fg=fg2,activebackground=actvbgnd,
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height=h, width=w,font= font).grid(row=r-4,column= c-7)
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Button(cal,command = clearall, text = "AC",bg= bg2, fg=fg2,activebackground=actvbgnd,
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height=h, width=w,font= font).grid(row=r-4,column= c-6)
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Button(cal,command = lambda: pressbtn('.'), text = "•", bg= bg3, fg=fg2,activebackground=actvbgnd,
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height=h, width=w,font= font).grid(row=r,column=c-5)
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Button(cal,command = lambda: pressbtn('+'), text = "+", bg= bg3, fg=fg2,activebackground=actvbgnd,
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height=h, width=w,font= font).grid(row=r-2,column=c-4)
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Button(cal,command = lambda: pressbtn('-'), text = "–", bg= bg3, fg=fg2,activebackground=actvbgnd,
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height=h, width=w,font= font).grid(row=r-3,column=c-4)
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Button(cal,command = lambda: pressbtn('/'), text = "/", bg= bg3, fg=fg2,activebackground=actvbgnd,
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height=h, width=w,font= font).grid(row=r-4,column=c-5)
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Button(cal,command = lambda: pressbtn('*'), text = "✶", bg= bg3, fg=fg2,activebackground=actvbgnd,
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height=h, width=w,font= font).grid(row=r-4,column=c-4)
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Button(cal,command = equal, text = "=", bg= bg2, fg=fg2,activebackground=actvbgnd,
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height=2*h,width=w,font= font,pady=10).grid(row=r-1,column=c-4,rowspan=2,)
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list1=['(',')','%','asin','sin','log','x^2','acos','cos','ln','x^3','atan','tan','e^x','1/x','x^y','e',"π",'√x','sgn']
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list2=['(',')','%','asin(','sin(','log(','^2','acos(','cos(','ln(','^3','atan(','tan(','e^','1/','^','e',"π",'√(','sgn(']
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i=0
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for j in range(5):
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for k in range(4):
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Button(cal,command = lambda x= list2[i]: pressbtn(x), text = list1[i], bg=bg4, fg= fg2,activebackground=actvbgnd,
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height=h,width=w,font= font).grid(row=j+1,column=k+4)
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i+=1
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#set the spacing between buttons
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msize=60
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cal.rowconfigure(0,minsize=50)
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for i in range(1,6):
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cal.rowconfigure(i,minsize=60)
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msize = 90
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for i in range(8):
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cal.columnconfigure(i,minsize= msize)
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cal.mainloop()
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