CITS2200 - Lecture 1

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Unit Details - Slides

Assessments

• Only 3 labs are assessed
  • Rest are for practice

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Object & Arrays in Python - Slides

Memory Model

See: Memory

Objects in Python

• Python is an object-oriented language
  • Classes are the basis for all data types
    e.g. int, float, str are inbuilt classes
• Given temperature = 98.6:

  • temperature-> reference to object

  • 98.6 -> object of class float

    

• Now if we add original = temperature:
  • We create another reference (also called an alias) for this object
    

Class is the blueprint and object is a specific instance

Every class like float and int has methods that can be used to manipulate the values of the object

Constructor is a method to create an object of a specific class

• i.e. instead of t = 98.6 -> we can write t = float(98.6)
• Constructor has same name as class

If an object has no reference, it is unusable and in Python, a background program will clear the object from memory to free up space

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CITS2200 - Lecture 2