import math

class Lesson2:
    '''
    A basic class that has the capabilities to add, subtract, multiply, divide,
    modulo and sqare root two inputs.
    '''
    
    def __init__(self, x, y):
        self.x = x
        self.y = y
    
    def add(self):
        return self.x+self.y
        
    def sub(self):
        return self.x-self.y
        
    def mult(self):
        return self.x*self.y
        
    def div(self):
        return self.x/self.y
        
    def mod(self):
        return self.x%self.y
        
    def sqrt(self):
        return math.sqrt(self.x)
        
if __name__ == "__main__":
    
    #A simple test with basic integers
    test = Lesson2(4,7)
    print test.add()
    print test.sub()
    print test.mult()
    print test.div()
    print test.mod()
    print test.sqrt()
    
    print '-'*20
    
    #A simple test with a float and an integer
    print type(4.0)
    print test.add()
    print test.sub()
    print test.mult()
    print test.div()
    print test.mod()
    print test.sqrt()
    
    print '-'*20
    
    #What happens if we try it with strings?
    test = Lesson2('cat','dog')
    print test.add()
    print test.sub()
    print test.mult()
    print test.div()
    print test.mod()
    print test.sqrt()