'''
lect09_6.py - contains two examples of Python classes
    modified from "Learning Python", Lutz and Ascher, O'Reilly
    p. 347, I think, but example is referred to in Chapters 19-23

adapted by: Sharon M. Tuttle
last modified: 10-24-06
'''

class Employee:
    """
    Yup, this is the docstring for a class!
    Class Employee: a worker
    """
    def __init__(self, lastname, salary=0):
        """
        Employee constructor
        """
        self.lastname = lastname
        self.salary = salary

    def giveRaise(self, percent):
        """
        Increase this employee's salary by <percent>
        """
        self.salary = self.salary + (self.salary * percent)

    def work(self):
        """
        print a message saying what this Employee does
        """
        print self.lastname, "does stuff"

    def __repr__(self):
        """
        return the string representation for this Employee
        """
        return "<Employee: lastname=%s salary=$%.2f>" % (self.lastname, self.salary)

class Square:
    """
    class Square: a shape with 4 equal sides, each of length
        <side_length>, and a color <color>.
    """

    def __init__(self, side_length, color="red"):
        """
        Square constructor: if a color is not specified, the
            square instance is assumed to be red
        """
        self.side_length = side_length
        self.color = color

    def computeArea(self):
        """
        Return the area of this square
        """
        return self.side_length * self.side_length

    def computeCircumf(self):
        """
        Return the circumference of this square
        """
        return self.side_length * 4

    def __repr__(self):
        """ 
        Return a string representation of this square
        """
        return "<Square: side_length=%.1f color=%s>" % (self.side_length, self.color)