Scientific Calculator Added

Author: Lavish Bansal

Scripts/Miscellaneous/Scientific_Calculator_GUI/README.md

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+# Scientific-Calculator-GUI-Tkinter
+Scientific and Standard Calculator combined, made in python using Tkinter module based on GUI.
+
+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.
+
+Though it may look like a long code, but it is very easy to understand. I tried to shorten it as much as possible. It works very efficiently and fastly for as many functions you enter in a single expression it will evaluate it correctly. 
+
+Note: The only condition with it is that must contain appropriate parantheses otherwise its gonna take it as an Invalid Expression.
+
+
+![alt text](https://github.com/lavish619/Scientific-Calculator-GUI-Tkinter/blob/master/scientific%20%20calc%20image.jpg?raw=true)

Scripts/Miscellaneous/Scientific_Calculator_GUI/Scientific Calculator.py

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+import tkinter.font
+from tkinter import *
+import math
+
+def clearall():
+    global expression
+    global equation
+    global value
+    global ans
+    expression=''
+    value=''
+    ans=''
+    equation.set(expression)
+
+def sgn(a):
+    return 1 if a>0 else -1 if a<0 else 0
+
+def clearback():
+    result1=""
+    result2=""
+    global equation
+    global expression
+    global value
+    global ans
+
+    expression = area.get()
+    temp1= list(expression)    
+    temp2= list(value)
+        
+    if value=='':
+        temp1=[]
+        temp2=[]
+    elif expression[-5:] in ["asin(","acos(","atan("]:
+        for _ in range(5):temp1.pop()
+        for _ in range(10):temp2.pop()
+   
+    elif expression[-4:]=="log(":
+        for _ in range(4):temp1.pop()
+        for _ in range(11):temp2.pop()
+        
+    elif expression[-4:] in ['sin(','cos(','tan(']:
+        for _ in range(4): temp1.pop()
+        for _ in range(9): temp2.pop()
+    
+    elif expression[-4:]=='sgn(':
+        for _ in range(4): temp1.pop()
+        for _ in range(4): temp2.pop()
+        
+    elif expression[-3:]=='ln(':
+        for _ in range(3):temp1.pop()
+        for _ in range(9): temp2.pop()
+        
+    elif expression[-2:]=='e^':
+        for _ in range(2):temp1.pop()
+        for _ in range(8): temp2.pop()
+        
+    elif expression[-1]=='^':
+        for _ in range(1):temp1.pop()
+        for _ in range(2): temp2.pop()
+
+    elif expression[-1]=="√":
+        for _ in range(1):temp1.pop()
+        for _ in range(10):temp2.pop()
+        
+    elif expression[-1]=='π':
+        for _ in range(1):temp1.pop()
+        for _ in range(7): temp2.pop()
+        
+    elif expression[-1]=='e':
+        for _ in range(1):temp1.pop()
+        for _ in range(6): temp2.pop() 
+
+    elif expression[-1]=='%':
+        for _ in range(1):temp1.pop()
+        for _ in range(4): temp2.pop()      
+        
+    else: 
+        temp1.pop()
+        temp2.pop()
+        
+    for element in range(len(temp1)):
+        result1+=temp1[element]
+    expression = result1
+    equation.set(expression)
+        
+    for element in range(len(temp2)):
+        result2+=temp2[element]
+        
+    value=result2
+    try:ans = str(eval(value))
+    except:pass
+    
+def pressbtn(num):
+    global expression 
+    global value
+    global ans
+    expression = expression + str(num)
+    equation.set(expression)
+    if num in ["1","2","3","4","5","6","7","8","9","0","(",")","00"]:
+        value += num
+        try:ans = str(eval(value))
+        except:ans = "Invalid Expression"
+        
+    elif num in ["+",'-','/','*','.','1/','sgn(']:
+        value += num
+      
+    elif num in ['asin(','acos(','atan(','sin(','cos(','tan(']:
+        value += 'math.'+ num
+    
+    elif num=='^':value += '**'
+    
+    elif num=='%':
+        value += '/100'
+        try:ans = str(eval(value))
+        except:ans = "Invalid Expression"
+    elif num=='^2':
+        value += '**2'
+        try:ans = str(eval(value))
+        except:ans = "Invalid Expression"
+    elif num=='^3':
+        value += '**3'
+        try:ans = str(eval(value))
+        except:ans = "Invalid Expression"
+
+    elif num=='√(':value += 'math.sqrt('
+    
+    elif num=='e':
+        value += 'math.e'
+        try:ans = str(eval(value))
+        except:ans = "Invalid Expression"
+    elif num=='π':
+        value += 'math.pi'
+        try:ans = str(eval(value))
+        except:ans = "Invalid Expression"
+    elif num=='log(':value += 'math.log10('
+    elif num=='ln(':value += 'math.log('
+    elif num=='e^':value += 'math.e**'
+    
+def equal():
+    global ans
+    global value
+    global expression
+    
+    if value=="":
+        ans=""
+        
+    equation.set(ans)
+    ans=''
+    value=''
+    expression=''
+
+root=Tk()
+root.title("Scientific Calculator")
+
+root.resizable(False,False)
+cal= Frame(root)
+cal.grid()
+cal.configure(bg="burlywood4")
+equation=StringVar()
+
+area = Entry(cal, textvariable = equation,width= 60, font= ("Comic Sans MS", 15),bd=10 ,justify=LEFT,state=DISABLED,
+             disabledbackground="white",disabledforeground="black") 
+area.insert(0,"0")
+area.grid(row=0,columnspan=8)
+
+def standard():
+    root.geometry('361x350')
+    area['width']=28
+    area.grid(row=0,columnspan=4,sticky= EW)
+    root.title("Standard Calculator")
+    
+def scientific():
+    root.geometry('742x350')
+    area['width']=60
+    area.grid(row=0,columnspan=8)
+    root.title("Scientific Calculator")
+
+menubar = Menu(cal)
+filemenu= Menu(menubar,tearoff=0)
+menubar.add_cascade(label="File", menu=filemenu)
+filemenu.add_command(label= "Standard", command= standard)
+filemenu.add_separator()
+filemenu.add_command(label="Scientific", command= scientific)
+root.config(menu=menubar)
+
+value=""   
+ans=""
+expression=""
+
+font= tkinter.font.Font(size=12,weight= "bold", family='Helvetica',)
+h=2
+w=7
+actvbgnd='white'
+bg1='wheat3'
+bg2="burlywood1"
+bg3="burlywood2"
+bg4= "tan1"
+fg1= "white"
+fg2="black"
+
+numberpad = [7,8,9,4,5,6,1,2,3]
+i=0
+for j in range(3):
+    for k in range(3):
+        Button(cal,command  = lambda x = str(numberpad[i]) : pressbtn(x), text = str(numberpad[i]), bg= bg1, fg=fg2,activebackground=actvbgnd,
+               height=h, width=w,font= font).grid(row=j+2,column=k)
+        i+=1
+
+r=5
+c=7
+Button(cal,command  = lambda: pressbtn(0),  text = "0", bg= bg1, fg=fg2,activebackground=actvbgnd,
+                    height=h, width=w,font= font).grid(row=r,column= c-7)
+Button(cal,command  = lambda: pressbtn('00'),text = "00", bg= bg1, fg=fg2,activebackground=actvbgnd,
+                    height=h, width=w,font= font).grid(row=r,column= c-6)
+Button(cal,command  = clearback,            text = "C", bg= bg2, fg=fg2,activebackground=actvbgnd,
+                    height=h, width=w,font= font).grid(row=r-4,column= c-7)
+Button(cal,command  = clearall,              text = "AC",bg= bg2, fg=fg2,activebackground=actvbgnd,
+                   height=h, width=w,font= font).grid(row=r-4,column= c-6)
+Button(cal,command  = lambda: pressbtn('.'), text = "•", bg= bg3, fg=fg2,activebackground=actvbgnd,
+                   height=h, width=w,font= font).grid(row=r,column=c-5)
+Button(cal,command  = lambda: pressbtn('+'), text = "+", bg= bg3, fg=fg2,activebackground=actvbgnd,
+                   height=h, width=w,font= font).grid(row=r-2,column=c-4)
+Button(cal,command  = lambda: pressbtn('-'),  text = "–", bg= bg3, fg=fg2,activebackground=actvbgnd,
+                  height=h, width=w,font= font).grid(row=r-3,column=c-4)
+Button(cal,command  = lambda: pressbtn('/'),   text = "/", bg= bg3, fg=fg2,activebackground=actvbgnd,
+                 height=h, width=w,font= font).grid(row=r-4,column=c-5)
+Button(cal,command  = lambda: pressbtn('*'),  text = "✶", bg= bg3, fg=fg2,activebackground=actvbgnd,
+                  height=h, width=w,font= font).grid(row=r-4,column=c-4)
+Button(cal,command  = equal,                text = "=", bg= bg2, fg=fg2,activebackground=actvbgnd,
+                    height=2*h,width=w,font= font,pady=10).grid(row=r-1,column=c-4,rowspan=2,)
+
+list1=['(',')','%','asin','sin','log','x^2','acos','cos','ln','x^3','atan','tan','e^x','1/x','x^y','e',"π",'√x','sgn']
+list2=['(',')','%','asin(','sin(','log(','^2','acos(','cos(','ln(','^3','atan(','tan(','e^','1/','^','e',"π",'√(','sgn(']
+i=0
+for j in range(5):
+    for k in range(4):
+        Button(cal,command  = lambda x= list2[i]: pressbtn(x),  text = list1[i], bg=bg4,  fg= fg2,activebackground=actvbgnd,
+               height=h,width=w,font= font).grid(row=j+1,column=k+4)
+        i+=1
+
+msize=60
+cal.rowconfigure(0,minsize=50)
+for i in range(1,6):
+    cal.rowconfigure(i,minsize=60)
+
+msize = 90
+for i in range(8): 
+    cal.columnconfigure(i,minsize= msize)
+
+cal.mainloop()