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Class example - restaurant
Objects - Intermediate example from a Well House Consultants training course
More on Objects - Intermediate [link]
Source code: Module: Y112

import sys

class _table(object):
        def getWaitPerson(self): return self.waiter
        def getNumber(self): return
        def __str__(this): return "[g] Table {1}, server {0}".format(this.waiter,

        template = "{0:15s} {2:3} {1:>5s}"

        # ex_string = "R 1500 2600 3 Millie\n"
        # newtable = _table.create(ex_string)

        def create(raw):
                _table.errmsg = ""
                result = None
                p = raw.strip().split(" ")
                if p[0] == "R":
                                result = rectangular(p[3],p[4],float(p[1]),float(p[2]))
                                _table.errmsg = "Recangulare error: " + raw.strip()
                elif p[0] == "C":
                                result = circular(p[2],p[3],float(p[1]))
                                _table.errmsg = "Circular error: " + raw.strip()
                        _table.errmsg = "Data format error in: " + raw.strip()
                return result
        create = staticmethod(create)
        def factory(filename):
                building = []
                for record in open(filename):
                        tabby = _table.create(record)
                        if tabby:
                                print _table.errmsg
                return building
        factory = staticmethod(factory)

class rectangular(_table):
        def __init__(self,name,waiter,x,y):
       = name
                self.x = x
                self.y = y
        def getSeats(self): return (int(self.x / 850) + int(self.y/850)) *2
class circular(_table):
        def __init__(self,name,waiter,x):
       = name
                self.x = x
        def getSeats(self): return (int(self.x*3.14159265/850))
        def __str__(this): return "[c] Table {1}, server {0}".format(this.waiter,
if __name__ == "__main__":
        tables = [ rectangular("1","Millie",2000,1000), rectangular("2","Billy",1600,800),

        ex_string = "V 1500 2600 3 Millie\n"

        newtable = _table.create(ex_string)
        if newtable: tables.append(newtable)
        else: sys.stderr.write(_table.errmsg + "\n")

        finishedProduct = _table.factory("restaurant.ssv")
        tables += finishedProduct

        peeps = 0
        teamname = "Gzallion"
        for t in tables:
                print _table.template.format(t.getWaitPerson(),t.getNumber(),t.getSeats())
                peeps += t.getSeats()
        print _table.template.format('-' * len(teamname),'-'*len("Total"),"---")
        print _table.template.format(teamname,"Total",peeps)

        for t in tables: print t,type(t)
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.

Full description of the source code
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