Converting Decimal Numbers to Binary Numbers Using Stacks

This code will take an integer decimal number and convert it to a binary number. Here stack is used to reverse the remainder to output the binary number.

class Stack:
    def __init__(self):
        self.items = [] #create new list with no items
    def __repr__(self):
        return repr(self.items) #define what to return is the stackname is called
    def isEmpty(self):
        return self.items == [] #check whether list if empty and retuen T or F
    def size(self):
        return len(self.items) #return size of stack (= length of list)
    def push(self,val):
        self.items.append(val) #add the argument pass to the end of list
    def pop(self):
        return self.items.pop() #return the last item in list because index not specified
    def peek(self):
        return self.items[-1] #return last item (-1 because from right indices are negative)

NumDec=0    #initialize as int
NumBin=''   #initialize as string

NumDec=int(input("Please enter the integer to convert : ")) #assign the Number to variable
print ("Decimal Number = ",NumDec)

thestack=Stack()    #create the stack

while NumDec>0 :    #loop till the number we divide is 1 or 0
    thestack.push(NumDec%2) #add the remainder when divide by 2 to stack
    NumDec=NumDec//2    #change the number to be divide to the whole number when divided by 2

while thestack.isEmpty()==False:    #loop till stack become empty
    NumBin=NumBin+str(thestack.pop())   #add the item to string
print("Binary Number = ",NumBin)

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