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Figure 5 . Output from code in Listing 9.
Instantiate and display two objects of TestClass<__main__.TestClass object at 0x00274910><__main__.TestClass object at 0x005A25F0>Add an instance variable to one object and display it 1234Try to display the same instance variable in the other object Traceback (most recent call last):File "1359-1430-13.py", line 18, in<module>print(ref02.iVar) AttributeError: 'TestClass' object has no attribute 'iVar'
Listing 10 . Complete program listing.
# Illustrates ability for object to modify itself at runtime #---------------------------------------------------------------------------class TestClass(object): def addInstanceVar(self,data):self.iVar = data print("Instantiate and display two objects of TestClass")ref01 = TestClass() print(ref01)ref02 = TestClass() print(ref02)print("Add an instance variable to one object and display it") ref01.addInstanceVar(1234)print(ref01.iVar) print("Try to display the same instance variable in the other object")print(ref02.iVar)
Figure 6 . Output from code in Listing 10.
Instantiate and display two objects of TestClass<__main__.TestClass object at 0x00224910><__main__.TestClass object at 0x00512850>Add an instance variable to one object and display it 1234Try to display the same instance variable in the other object Traceback (most recent call last):File "1359-1430-15.py", line 20, in<module>print(ref02.iVar) AttributeError: 'TestClass' object has no attribute 'iVar'
Listing 11 . Complete program listing.
# This program illustrates instance variables and the __init__ method #---------------------------------------------------------------------------class TestClass(object): def __init__(self,data):self.iVar01 = datadef addInstanceVar(self,data): self.iVar02 = dataprint("Instantiate and display two objects of TestClass") ref01 = TestClass("ABCD")print(ref01) ref02 = TestClass("DEFG")print(ref02) print("Display first instance variable from both objects")print(ref01.iVar01) print(ref02.iVar01)print("Add an instance variable to one object and display it") ref01.addInstanceVar(1234)print(ref01.iVar02) print("Try to display the same instance variable in the other object")print(ref02.iVar02)
Figure 7 . Output from code in Listing 11.
Instantiate and display two objects of TestClass<__main__.TestClass object at 0x00492E50><__main__.TestClass object at 0x00492E70>Display first instance variable from both objects ABCDDEFG Add an instance variable to one object and display it1234 Try to display the same instance variable in the other objectTraceback (most recent call last): File "1359-1430-17.py", line 26, in<module>print(ref02.iVar02) AttributeError: 'TestClass' object has no attribute 'iVar02'

Miscellaneous

This section contains a variety of miscellaneous information.

Housekeeping material
  • Module name: Itse1359-1430-Instance Variables
  • File: Itse1359-1430.htm
  • Published: 10/27/14
  • Revised: 03/04/15
Disclaimers:

Financial : Although the Connexions site makes it possible for you to download a PDF file for thismodule at no charge, and also makes it possible for you to purchase a pre-printed version of the PDF file, you should beaware that some of the HTML elements in this module may not translate well into PDF.

I also want you to know that, I receive no financial compensation from the Connexions website even if you purchase the PDF version of the module.

In the past, unknown individuals have copied my modules from cnx.org, converted them to Kindle books, and placed them for sale on Amazon.com showing me as the author. Ineither receive compensation for those sales nor do I know who does receive compensation. If you purchase such a book, please beaware that it is a copy of a module that is freely available on cnx.org and that it was made and published withoutmy prior knowledge.

Affiliation : I am a professor of Computer Information Technology at Austin Community College in Austin, TX.

-end-

Questions & Answers

How we are making nano material?
LITNING Reply
what is a peer
LITNING Reply
What is meant by 'nano scale'?
LITNING Reply
What is STMs full form?
LITNING
scanning tunneling microscope
Sahil
what is Nano technology ?
Bob Reply
write examples of Nano molecule?
Bob
The nanotechnology is as new science, to scale nanometric
brayan
nanotechnology is the study, desing, synthesis, manipulation and application of materials and functional systems through control of matter at nanoscale
Damian
Is there any normative that regulates the use of silver nanoparticles?
Damian Reply
what king of growth are you checking .?
Renato
What fields keep nano created devices from performing or assimulating ? Magnetic fields ? Are do they assimilate ?
Stoney Reply
why we need to study biomolecules, molecular biology in nanotechnology?
Adin Reply
?
Kyle
yes I'm doing my masters in nanotechnology, we are being studying all these domains as well..
Adin
why?
Adin
what school?
Kyle
biomolecules are e building blocks of every organics and inorganic materials.
Joe
anyone know any internet site where one can find nanotechnology papers?
Damian Reply
research.net
kanaga
sciencedirect big data base
Ernesto
Introduction about quantum dots in nanotechnology
Praveena Reply
what does nano mean?
Anassong Reply
nano basically means 10^(-9). nanometer is a unit to measure length.
Bharti
do you think it's worthwhile in the long term to study the effects and possibilities of nanotechnology on viral treatment?
Damian Reply
absolutely yes
Daniel
how to know photocatalytic properties of tio2 nanoparticles...what to do now
Akash Reply
it is a goid question and i want to know the answer as well
Maciej
characteristics of micro business
Abigail
for teaching engĺish at school how nano technology help us
Anassong
How can I make nanorobot?
Lily
Do somebody tell me a best nano engineering book for beginners?
s. Reply
there is no specific books for beginners but there is book called principle of nanotechnology
NANO
how can I make nanorobot?
Lily
what is fullerene does it is used to make bukky balls
Devang Reply
are you nano engineer ?
s.
fullerene is a bucky ball aka Carbon 60 molecule. It was name by the architect Fuller. He design the geodesic dome. it resembles a soccer ball.
Tarell
what is the actual application of fullerenes nowadays?
Damian
That is a great question Damian. best way to answer that question is to Google it. there are hundreds of applications for buck minister fullerenes, from medical to aerospace. you can also find plenty of research papers that will give you great detail on the potential applications of fullerenes.
Tarell
what is the Synthesis, properties,and applications of carbon nano chemistry
Abhijith Reply
Mostly, they use nano carbon for electronics and for materials to be strengthened.
Virgil
is Bucky paper clear?
CYNTHIA
carbon nanotubes has various application in fuel cells membrane, current research on cancer drug,and in electronics MEMS and NEMS etc
NANO
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