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For 2023 (and 2024 ...) - we are now fully retired from IT training.
We have made many, many friends over 25 years of teaching about Python, Tcl, Perl, PHP, Lua, Java, C and C++ - and MySQL, Linux and Solaris/SunOS too. Our training notes are now very much out of date, but due to upward compatability most of our examples remain operational and even relevant ad you are welcome to make us if them "as seen" and at your own risk.

Lisa and I (Graham) now live in what was our training centre in Melksham - happy to meet with former delegates here - but do check ahead before coming round. We are far from inactive - rather, enjoying the times that we are retired but still healthy enough in mind and body to be active!

I am also active in many other area and still look after a lot of web sites - you can find an index ((here))
OO demo - multiple classes, inheritance, test program
Objects - Intermediate example from a Well House Consultants training course
More on Objects - Intermediate [link]

This example is described in the following article(s):
   • Python - fresh examples from recent courses - [link]

Source code: personx.py Module: Y112
"""Base class person and subclasses applicant and
staff for the demo during a course. There's also a test
harness / program at the end of this code which will only
get run if you call up this file directly rather than through
an "import" or "from" """


class person(object):
""" all about a person """
        def getname(current):
""" getname docs """
                return current.name
        def hasbirthday(current):
                current.years += 1.0
        def getypa(current):
                return current.years / current.al

class applicant(person):
        def __init__(current,name,age,alevels):
                current.name = name
                current.years = float(age)
                current.al = int(alevels)
        def getworklength(current):
                return 0
class staff(person):
        def __init__(current,name,age,alevels,endurance):
                current.name = name
                current.years = float(age)
                current.al = int(alevels)
                current.yw = int(endurance)
        def getypa(current):
                return current.years / current.al -2.0
        def getworklength(current):
                return current.yw

def person_factory(info):
        line = info.strip()
        fields = line.split(" ")
        if fields[2].isdigit():
                name = fields[3:]
                n = " ".join(name)
                result = staff(n,fields[1],fields[0],fields[2])
        else:
                name = fields[2:]
                n = " ".join(name)
                result = applicant(n,fields[1],fields[0])
        return result

if __name__ == "__main__":
        choice = []

        fh = open("ufd")
        for record in fh.readlines():
                print record
                choice.append(person_factory(record))

        for option in choice:
                print option.__class__.__name__
                print option.getname(),option.getypa()
                print option.getworklength()

""" Sample output

wizard:pyoo graham$ python personx.py
3 21 Bob Smith

4 54 Barbara Widdicombe

1 80 Fred Dibnah

5 25 7 Noel Bunton

3 37 Jenny Wren

3 32 0 Jenny Jownes

applicant
Bob Smith 7.0
0
applicant
Barbara Widdicombe 13.5
0
applicant
Fred Dibnah 80.0
0
staff
Noel Bunton 3.0
7
applicant
Jenny Wren 12.3333333333
0
staff
Jenny Jownes 8.66666666667
0
wizard:pyoo graham$

"""

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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