class Contact:
    
    ''' A contact in an address book.'''

    # Attributes:
    #     name (str)
    #     address (str)
    #     main_phone_number (str)
    #     secondary_hone_number (str)
    #     is_business (bool)

    def rename(self, new_name):
        '''Rename this Contact.'''
        pass
        
    def set_address(self, new_address):
        '''Set the address to new_address'''
        pass
        
    def set_phone_number(self, new_number, main_phone=True):
        '''Set the main phone number to str new_number if default argument is used;
        otherwise set the secondary phone number to str new_number.'''
        pass

# An example call: c.set_phone_number("555-555-5555", False)

    def set_whether_business(self, is_biz):
        '''Set whether this Contact is a business to True if is_biz is True,
        and False otherwise.'''
        pass