Basic calculator using tkinter

calculator.py

import tkinter as tk
from tkinter import *
import math
from functools import reduce

def reverse(s):
  str = ""
  for i in s:
    str = i + str
  return str

def findroots(equation):   
    import cmath

    posadd = equation.find('+')
    possub = equation.find('-')

    if '&' in equation:

        n = equation.find('&')
        a =  equation[:n]

    if 'x' in equation:

        n = equation.find('x')
        
        g = equation[posadd:n]
        
        h = equation[possub:n]


    try:
        b = float(g)
    except Exception as e:
        b = float(h)
    c = equation[n +1:]

    a = float(a)
    c = float(c)

    print (a, b ,c)

    # calculate the discriminant  
    d = (b**2) - (4*a*c)  
    
    # find two solutions  
    sol1 = (-b-cmath.sqrt(d))/(2*a)  
    sol2 = (-b+cmath.sqrt(d))/(2*a)  
    print('The solution are {0} and {1}'.format(sol1,sol2))  
    return ('{0} and {1}'.format(sol1,sol2))  

def find_nth(haystack, needle, n):
    start = haystack.find(needle)
    while start >= 0 and n > 1:
        start = haystack.find(needle, start+len(needle))
        n -= 1
    return start

def remove(string):
    return string.replace(" ", "")

def Convert(lst):
    return [ -i for i in lst if str(i) != str(i[0])]

def raisedToFinder (number, power):
    value = 1
    for x in range(1, power+1):
        value = number * value
    print (value)

def click(event):
    global scvalue
    text = event.widget.cget("text")
    text = remove(text)
    # numbers = [1,2,3,4,5,6,7,8,9,0,'1','2','3','4','5','6','7','8','9','0']
    if text == "=":
        b = scvalue.get()
        b = remove(b)
        if 'pi' in b:
            b.replace('pi', '22/7')

        if scvalue.get().isdigit():
            
            value = int(b)

        elif '&' in scvalue.get() :
            b = scvalue.get()
            value = findroots(b)

        elif 'sin' in scvalue.get():

            b = scvalue.get()
            list = []
            print(b)
            value = 0
            splitNegative = None
            if '-' in b:
                list = b.split('-')
                print(list)
                splitNegative = True

            else :
                list = b.split('+')

            lastlist = []

            for a in list:
                z = a.replace('sin', '')
                i = math.sin(float(z))
                lastlist.append(i)
            
            try:
                if splitNegative == True :
                    value = lastlist[0] - lastlist[1]
                else:
                    value = lastlist[0] + lastlist[1]
            except Exception as e:
                value= lastlist[0]

            scvalue.set(value)
            Answerlabel.update()

        if 'cos' in scvalue.get():

            b = scvalue.get()
            list = []
            print(b)
            value = 0
            splitNegative = None
            if '-' in b:
                list = b.split('-')
                print(list)
                splitNegative = True

            else :
                list = b.split('+')

            lastlist = []

            for a in list:
                z = a.replace('cos', '')
                i = math.cos(float(z))
                lastlist.append(i)
            
            try:
                if splitNegative == True :
                    value = lastlist[0] - lastlist[1]
                else:
                    value = lastlist[0] + lastlist[1]
            except Exception as e:
                value= lastlist[0]

            scvalue.set(value)
            Answerlabel.update()
            
        else:
            try:
                value = eval(Answerlabel.get())
            except Exception as e:
                print(e)
                value = "Error"

        scvalue.set(value)
        Answerlabel.update()

    elif text == "C":
        scvalue.set("")
        Answerlabel.update()

    elif text == '<':
        b = scvalue.get()
        size = len(b)
        a = b[:size-1]   
        scvalue.set(a)   
            
    else:
        scvalue.set(scvalue.get() + text)
        Answerlabel.update()

root = tk.Tk()
root.title('Calculator')
root.geometry('800x450')
root.configure(bg='#3e4f5e')

scvalue = StringVar()
scvalue.set("")

b = Button(root , padx=15 , pady = 10, activebackground= '#adb9cc' , relief='raised' , text= '1' , font=('helvetica', 20, 'bold'))
b.place(x= 75 , y=280)
b.bind("<Button-1>", click)

b = Button(root , padx=15 , pady = 10, activebackground= '#adb9cc' , relief='raised' , text= '2' , font=('helvetica', 20, 'bold'))
b.place(x= 150 , y=280)
b.bind("<Button-1>", click)

b = Button(root , padx=15 , pady = 10, activebackground= '#adb9cc' , relief='raised' , text= '3' , font=('helvetica', 20, 'bold'))
b.place(x= 225 , y=280)
b.bind("<Button-1>", click)

b = Button(root , padx=15 , pady = 10, activebackground= '#adb9cc' , relief='raised' , text= '4' , font=('helvetica', 20, 'bold'))
b.place(x= 75 , y=200)
b.bind("<Button-1>", click)

b = Button(root , padx=15 , pady = 10, activebackground= '#adb9cc' , relief='raised' , text= '5' , font=('helvetica', 20, 'bold'))
b.place(x= 150 , y=200)
b.bind("<Button-1>", click)

b = Button(root , padx=15 , pady = 10, activebackground= '#adb9cc' , relief='raised' , text= '6' , font=('helvetica', 20, 'bold'))
b.place(x= 225 , y=200)
b.bind("<Button-1>", click)

b = Button(root , padx=15 , pady = 10, activebackground= '#adb9cc' , relief='raised' , text= '7' , font=('helvetica', 20, 'bold'))
b.place(x= 75 , y=120)
b.bind("<Button-1>", click)

b = Button(root , padx=15 , pady = 10, activebackground= '#adb9cc' , relief='raised' , text= '8' , font=('helvetica', 20, 'bold'))
b.place(x= 150 , y=120)
b.bind("<Button-1>", click)

b = Button(root , padx=15 , pady = 10, activebackground= '#adb9cc' , relief='raised' , text= '9' , font=('helvetica', 20, 'bold'))
b.place(x= 225 , y=120)
b.bind("<Button-1>", click)

b = Button(root , padx=15 , pady = 10, activebackground= '#adb9cc' , relief='raised' , text= '0' , font=('helvetica', 20, 'bold'))
b.place(x= 75 , y=360)
b.bind("<Button-1>", click)

b = Button(root , padx=15 , pady = 10, activebackground= '#adb9cc' , relief='raised' , text= '00' , font=('helvetica', 20, 'bold'))
b.place(x= 150 , y=360)
b.bind("<Button-1>", click)

b = Button(root , padx=15 , pady = 10, activebackground= '#adb9cc' , relief='raised' , text= '.' , font=('helvetica', 20, 'bold'))
b.place(x= 240 , y=360)
b.bind("<Button-1>", click)

add = tk.Button(root, padx=15 , pady = 10, activebackground= '#adb9cc' , relief='raised' , text= '+' , font=('helvetica', 20, 'bold'))
add.place(x= 320 , y=200)
add.bind("<Button-1>", click)

sub = tk.Button(root, padx=15 , pady = 10, activebackground= '#adb9cc' , relief='raised' , text= '- ' , font=('helvetica', 20, 'bold'))
sub.place(x= 320 , y=280)
sub.bind("<Button-1>", click)

b = Button(root , padx=15 , pady = 10, activebackground= '#adb9cc' , relief='raised' , text= '     C      ' , font=('helvetica', 20, 'bold'))
b.place(x= 320 , y=120)
b.bind("<Button-1>", click)

sub = tk.Button(root, padx=15 , pady = 10, activebackground= '#adb9cc' , relief='raised' , text= ' *' , font=('helvetica', 20, 'bold'))
sub.place(x= 405 , y=280)
sub.bind("<Button-1>", click)

sub = tk.Button(root, padx=15 , pady = 10, activebackground= '#adb9cc' , relief='raised' , text= '/ ' , font=('helvetica', 20, 'bold'))
sub.place(x= 405 , y=200)
sub.bind("<Button-1>", click)

sub = tk.Button(root, padx=15 , pady = 10, activebackground= '#adb9cc' , relief='raised' , text= '     =      ' , font=('helvetica', 20, 'bold'))
sub.place(x= 320, y=360)
sub.bind("<Button-1>", click)

back= tk.Button(root, padx=15 , pady = 10, activebackground= '#adb9cc' , relief='raised' , text= '<' , font=('helvetica', 20, 'bold'))
back.place(x= 490, y=120)
back.bind("<Button-1>", click)

back= tk.Button(root, padx=15 , pady = 10, activebackground= '#adb9cc' , relief='raised' , text= '&' , font=('helvetica', 20, 'bold'))
back.place(x= 490, y=200)
back.bind("<Button-1>", click)

back= tk.Button(root, padx=15 , pady = 10, activebackground= '#adb9cc' , relief='raised' , text= 'x' , font=('helvetica', 20, 'bold'))
back.place(x= 490, y=280)
back.bind("<Button-1>", click)

sin= tk.Button(root, padx=15 , pady = 10, activebackground= '#adb9cc' , relief='raised' , text= 'sin' , font=('helvetica', 20, 'bold'))
sin.place(x= 570, y=120)
sin.bind("<Button-1>", click)

sin= tk.Button(root, padx=15 , pady = 10, activebackground= '#adb9cc' , relief='raised' , text= 'cos' , font=('helvetica', 20, 'bold'))
sin.place(x= 570, y=200)
sin.bind("<Button-1>", click)

sin= tk.Button(root, padx=15 , pady = 10, activebackground= '#adb9cc' , relief='raised' , text= 'tan' , font=('helvetica', 20, 'bold'))
sin.place(x= 570, y=280)
sin.bind("<Button-1>", click)

back= tk.Button(root, padx=15 , pady = 10, activebackground= '#adb9cc' , relief='raised' , text= 'pi' , font=('helvetica', 20, 'bold'))
back.place(x= 490, y=360)
back.bind("<Button-1>", click)

scValue = StringVar()
scValue.set('')
Answerlabel = tk.Entry(root, textvariable=scvalue ,font =('Arial', 25) ,bg = '#61ab73', bd=2)
Answerlabel.place(x= 120,y=20)
root.mainloop()