Exam 10: Astronomy: Creating Classes, Writing Constructors, Accessors, Mutators and Special Methods

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Case Study 1: >>> count = 1 >>> count = count + 1 >>> count 2 >>> count = count.add(1) >>> count 3 >>> >>> mylist.getitem(1) 66 -Refer to the session in the accompanying Case Study 1. What is the equivalent of the getItem operator?

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Question 1

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Case Study 1: >>> count = 1 >>> count = count + 1 >>> count 2 >>> count = count.add(1) >>> count 3 >>> >>> mylist.getitem(1) 66 -Refer to the session in the accompanying Case Study 1. What is the equivalent of the + operator?

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What is a constructor method?

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The first method that all classes should provide is the constructor, which can be defined as the way data objects are created. The constructor will then create instance variables to hold these values. Each instance variable holds a reference to an object. In Python, the constructor is always called __init__ . Methods in class definitions are written in the same way as other functions seen thus far. We provide the name of the method and then a collection of parameters that describe the initial state of the new object. These parameters will be filled in with values when the method is invoked.

What keyword defines a class in Python?

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Question 4

What does it mean to say that "Python supports the object-oriented programming paradigm?"

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Question 5

To create an instance of a class, call the init method directly.

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Question 6

Match each definition with its term. -Describes what an object will "look" like, what an object knows about itself, and what an object can do.

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Question 7

What is velocity? Provide an example to illustrate.

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Question 8

____ methods change an object in some way.

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Question 9

Explain how method definitions are stored in Python.

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Question 10

An accessor method is most likely to be used to implement:

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Question 11

The ____ operator is used to invoke a method of an object.

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Question 12

Match each definition with its term. -Sometimes referred to as a "getter" method.

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Question 13

What are accessor methods?

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Question 14

The print method invokes the ____ method of a class.

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Question 15

The details about what an object can do are called:

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Question 16

Provide a high-level overview of the steps needed to create an animation of planets moving around the sun.

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Question 17

What are some of the primitive and collection classes built into the Python language?

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Question 18

Every Python object is an instance of a(n):

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Question 19

In a Python class, ____ refers to the object for which the method was called.

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Question 20

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Case Study 1: >>> count = 1 >>> count = count + 1 >>> count 2 >>> count = count.add(1) >>> count 3 >>> >>> mylist.getitem(1) 66 -Refer to the session in the accompanying Case Study 1. What is the equivalent of the getItem operator?

Case Study 1: >>> count = 1 >>> count = count + 1 >>> count 2 >>> count = count.add(1) >>> count 3 >>> >>> mylist.getitem(1) 66 -Refer to the session in the accompanying Case Study 1. What is the equivalent of the + operator?

What is a constructor method?

What keyword defines a class in Python?

What does it mean to say that "Python supports the object-oriented programming paradigm?"

To create an instance of a class, call the init method directly.

Match each definition with its term. -Describes what an object will "look" like, what an object knows about itself, and what an object can do.

What is velocity? Provide an example to illustrate.

____ methods change an object in some way.

Explain how method definitions are stored in Python.

An accessor method is most likely to be used to implement:

The ____ operator is used to invoke a method of an object.

Match each definition with its term. -Sometimes referred to as a "getter" method.

What are accessor methods?

The print method invokes the ____ method of a class.

The details about what an object can do are called:

Provide a high-level overview of the steps needed to create an animation of planets moving around the sun.

What are some of the primitive and collection classes built into the Python language?

Every Python object is an instance of a(n):

In a Python class, ____ refers to the object for which the method was called.

Introduction to Python: Introduction to Numeric Types, Turtle Graphics, Simple for Loops and Functions

Pthon: Estimating PI: Math and Random Methods, Selection and Boolean Expressions, the Print Function

Codes and Other Secrets: String Operators and Methods, the Len Built-In Function, Keyword Parameters, User Input

Introducing the Python Collections: Lists, Dictionaries, Tuples, and Statistics

Bigger Data: File Io: the While Loop, String Formatting, Reading Online Data in CSV and Json Formats

Image Processing: Nested for Loops, Functions As Parameters, Namespaces, Lists of Lists

Data Mining: Cluster Analysis: More on the While Loop; Parrallel Lists

Cryptanalysis: Advanced Dictionaries and Lists, Regular Expressions

Fractals: the Geometry of Nature: Recursion, Grammars and Production Rules

Simulation:computer Simulation Using Objects

Father Was a Rectangle: Inheritance and Object-Oriented Design

Video Games: Multithreading, Event Handlers, Static Variables

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Exam 10: Astronomy: Creating Classes, Writing Constructors, Accessors, Mutators and Special Methods

Case Study 1: >>> count = 1 >>> count = count + 1 >>> count 2 >>> count = count.__add__(1) >>> count 3 >>> >>> mylist.__getitem__(1) 66 -Refer to the session in the accompanying Case Study 1. What is the equivalent of the __getItem__ operator?

Case Study 1: >>> count = 1 >>> count = count + 1 >>> count 2 >>> count = count.__add__(1) >>> count 3 >>> >>> mylist.__getitem__(1) 66 -Refer to the session in the accompanying Case Study 1. What is the equivalent of the + operator?

What is a constructor method?

What keyword defines a class in Python?

What does it mean to say that "Python supports the object-oriented programming paradigm?"

To create an instance of a class, call the __init__ method directly.

Match each definition with its term. -Describes what an object will "look" like, what an object knows about itself, and what an object can do.

What is velocity? Provide an example to illustrate.

____ methods change an object in some way.

Explain how method definitions are stored in Python.

An accessor method is most likely to be used to implement:

The ____ operator is used to invoke a method of an object.

Match each definition with its term. -Sometimes referred to as a "getter" method.

What are accessor methods?

The print method invokes the ____ method of a class.

The details about what an object can do are called:

Provide a high-level overview of the steps needed to create an animation of planets moving around the sun.

What are some of the primitive and collection classes built into the Python language?

Every Python object is an instance of a(n):

In a Python class, ____ refers to the object for which the method was called.

Introduction to Python: Introduction to Numeric Types, Turtle Graphics, Simple for Loops and Functions

Pthon: Estimating PI: Math and Random Methods, Selection and Boolean Expressions, the Print Function

Codes and Other Secrets: String Operators and Methods, the Len Built-In Function, Keyword Parameters, User Input

Introducing the Python Collections: Lists, Dictionaries, Tuples, and Statistics

Bigger Data: File Io: the While Loop, String Formatting, Reading Online Data in CSV and Json Formats

Image Processing: Nested for Loops, Functions As Parameters, Namespaces, Lists of Lists

Data Mining: Cluster Analysis: More on the While Loop; Parrallel Lists

Cryptanalysis: Advanced Dictionaries and Lists, Regular Expressions

Fractals: the Geometry of Nature: Recursion, Grammars and Production Rules

Simulation:computer Simulation Using Objects

Father Was a Rectangle: Inheritance and Object-Oriented Design

Video Games: Multithreading, Event Handlers, Static Variables

Filters

Case Study 1: >>> count = 1 >>> count = count + 1 >>> count 2 >>> count = count.add(1) >>> count 3 >>> >>> mylist.getitem(1) 66 -Refer to the session in the accompanying Case Study 1. What is the equivalent of the getItem operator?

Case Study 1: >>> count = 1 >>> count = count + 1 >>> count 2 >>> count = count.add(1) >>> count 3 >>> >>> mylist.getitem(1) 66 -Refer to the session in the accompanying Case Study 1. What is the equivalent of the + operator?

To create an instance of a class, call the init method directly.