class ComplexNumber: 
    """ 
    This is a class for mathematical operations on complex numbers. 
    
    Attributes: 
        real (int): The real part of complex number. 
        imag (int): The imaginary part of complex number. 
    """

    def __init__(self, real, imag): 
        """ 
        The constructor for ComplexNumber class. 

        Parameters: 
        real (int): The real part of complex number. 
        imag (int): The imaginary part of complex number. 
        """

    def add(self, num): 
        """ 
        The function to add two Complex Numbers. 

        Parameters: 
            num (ComplexNumber): The complex number to be added. 
        
        Returns: 
            ComplexNumber: A complex number which contains the sum. 
        """

        re = self.real + num.real 
        im = self.imag + num.imag 

        return ComplexNumber(re, im) 

help(ComplexNumber) # to access Class docstring 
help(ComplexNumber.add) # to access method's docstring