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Define your own add and print methods
Objects - Intermediate example from a Well House Consultants training course
More on Objects - Intermediate [link]

This example is described in the following article(s):
   • Learning Python - many new example programs - [link]

Source code: yum Module: Y112

""" A class of cubic containers, where adding
them together gives you the largest X, the
largest Y and a sum of the two Zs. """

class box:
        def __init__(this,x,y,z):
                this.x = x
                this.y = y
                this.z = z
        def __add__(this,that):
                newx = this.x
                if this.x < that.x: newx = that.x
                newy = this.y
                if this.y < that.y: newy = that.y
                newz = this.z + that.z
                together = box(newx,newy,newz)
                return together
        def __str__(self):
                r = "A box "+str(self.x)+" by " + \
                        str(self.y)+" by " +\
                return r

bigmac = box(12,12,8)
flfish = box(15,10,7)
bag = bigmac + flfish

print bigmac
print flfish
print "Add to give",bag
Learn about this subject
This module and example are covered on the following public courses:
 * Learning to program in Python
 * Python Programming
 * Intermediate Python
Also available on on site courses for larger groups

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Other Examples
This example comes from our "Objects - Intermediate" training module. You'll find a description of the topic and some other closely related examples on the "Objects - Intermediate" module index page.

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