Object-Oriented Python
|
|
- Baldric Curtis
- 6 years ago
- Views:
Transcription
1 Object-Oriented Python
2 Everything is an object. Every object has a value. a type. an identity. a namespace. CS105 Python
3 def initstudent(student, eid): global A class is like a namespace. CS105 Python
4 def initstudent(student, eid): global A class is like Student a namespace. -- A class definition initstudent binds the class name to an object. These are the active namespaces after the class body. def initstudent(student, eid): CS105 Python 5
5 a def initstudent(student, eid): student = Student() Invoking a class name creates an instance of that class. -- An instance is like a namespace. These are the active namespaces after executing line a. Student initstudent global is an instance of def initstudent(student, eid): student CS105 Python 6
6 a b def initstudent(student, eid): student = Student() student.initstudent Accessing an instance s attributes causes chained lookups. These are the active namespaces when executing line b. Student initstudent global 1 is an instance of def initstudent(student, eid): student CS105 Python 7
7 a b explicit parameter def initstudent(self, eid): self.eid = eid self.courses = [] student = Student() student.initstudent('guido') implicit argument Methods are different from functions. These are the active namespaces just before executing line. Student eid initstudent global local 'guido' eid self is an instance of m def initstudent(student, eid): student CS105 Python 8
8 def init (self, eid): self.eid = eid self.courses = [] a student = Student('guido') Constructor creates and initializes at the same time. CS105 Python 10
9 def str (self): return eid Special Method Shortcut init Class() str str(obj) repr (Python representation) eq obj1 == obj getitem obj[i] setitem obj[i] = val Full list at docs.python.org/reference/datamodel.html#specialnames >>> student # calls repr < main.student instance at 0x8cb0> >>> print student # calls str guido CS105 Python 11
10 def init (self, eid): self.eid = eid self.courses = [] def enroll(self, course): self.courses.append(course) class Instructor: def init (self, eid): self.eid = eid self.courses = [] def assign(self, course): self.courses.append(course) Inheritance is one way to reuse code. CS105 Python 1
11 class Person: def init (self, eid): self.eid = eid self.courses = [] class Student(Person): def enroll(self, course): self.courses.append(course) class Instructor(Person): def assign(self, course): self.courses.append(course) Inheritance is one way to reuse code. CS105 Python 1
12 class Person: def init (self, eid): self.eid = eid self.courses = [] class Student(Person): def enroll(self, course): self.courses.append(course) class Instructor(Person): def init (self, eid, salary): Person. init (self, eid) self.salary = salary def assign(self, course): self.courses.append(course) Inheritance is one way to reuse code. overriding the base-class method explicitly invoking the base-class method CS105 Python 1
13 a b class Person: class Student(Person): class Instructor(Person): student = Student('guido') instructor = Instructor('wirth', 15000) Class Type >>> type(student) <type 'instance'> >>> type(instructor) <type 'instance'> CS105 Python 15
14 a b class Person(object): class Student(Person): class Instructor(Person): student = Student('guido') instructor = Instructor('wirth', 15000) Class Type >>> type(student) <class ' main.student'> >>> type(instructor) <class ' main.instructor'> CS105 Python 16
15 Subclassing Built-In Types class ReadOnlyList(list): def setitem (self, index, value): raise TypeError('This is a read-only list!') >>> rol = ReadOnlyList([1,,]) >>> rol[0] 1 >>> rol[0] = 0 Traceback (most recent call last): File "<stdin>", line 1, in <module> File "<stdin>", line, in setitem TypeError: This is a read-only list! CS105 Python 17
16 All a def init (self, eid): self.eid = eid self.courses = [] student = Student('guido') data is public. >>> student.eid 'guido' >>> dir(student) [' doc ', ' init ', ' module ', 'courses', 'eid'] CS105 Python 18
17 You a def init (self, eid): self. eid = eid self. courses = [] student = Student('guido') can hide it, but >>> student. eid Traceback (most recent call last): File "<stdin>", line 1, in <module> AttributeError: Student instance has no attribute ' eid' CS105 Python 19
18 All a def init (self, eid): self. eid = eid self. courses = [] student = Student('guido') data is public. >>> dir(student) ['_Student courses', '_Student eid', ' doc ', ' init ', ' module '] >>> student._student eid 'guido' CS105 Python 0
19 Encapsulation By Social Contract signal: _name protect: name The underscore says, This is an implementation detail. Modify at your own peril. CS105 Python 1
Lecture 17: Classes (Chapter 15)
http://www.cs.cornell.edu/courses/cs1110/2018sp Lecture 17: Classes (Chapter 15) CS 1110 Introduction to Computing Using Python [E. Andersen, A. Bracy, D. Gries, L. Lee, S. Marschner, C. Van Loan, W. White]
More informationCS111: PROGRAMMING LANGUAGE II
1 CS111: PROGRAMMING LANGUAGE II Computer Science Department Lecture 4(b): Subclasses and Superclasses OOP OOP - Inheritance Inheritance represents the is a relationship between data types (e.g. student/person)
More informationCS111: PROGRAMMING LANGUAGE II
CS111: PROGRAMMING LANGUAGE II Computer Science Department Lecture 4&5: Inheritance Lecture Contents What is Inheritance? Super-class & sub class The object class Using extends keyword @override keyword
More informationLecture 21. Programming with Subclasses
Lecture 21 Programming with Subclasses Announcements for Today Reading Today: See reading online Tuesday: Chapter 7 Prelim, Nov 9 th 7:30-9:00 Material up to Today Review has been posted Recursion + Loops
More informationLecture 21. Programming with Subclasses
Lecture 21 Programming with Subclasses Announcements for This Lecture Assignments Prelim 2 A4 is now graded Mean: 90.4 Median: 93 Std Dev: 10.6 Mean: 9 hrs Median: 8 hrs Std Dev: 4.1 hrs A5 is also graded
More informationECE 364 Software Engineering Tools Laboratory. Lecture 7 Python: Object Oriented Programming
ECE 364 Software Engineering Tools Laboratory Lecture 7 Python: Object Oriented Programming 1 Lecture Summary Object Oriented Programming Concepts Object Oriented Programming in Python 2 Object Oriented
More informationReview 2. Classes and Subclasses
Review 2 Classes and Subclasses Class Definition class (): """Class specification""" class variables (format: Class.variable) initializer ( init ) special method definitions
More informationBefore we start looking at how we build abstract data types in Python, let's define some import terms and look at some real-world examples.
Exception Handling Python Built-in Exceptions Abstract Data Types You can use a Python tuple to combine two simple values into a compound value. In this case, we use a 2-element tuple whose first element
More informationA Crash Course in Python Part II. Presented by Cuauhtémoc Carbajal ITESM CEM
A Crash Course in Python Part II Presented by Cuauhtémoc Carbajal ITESM CEM 1 Importing and Modules 2 Importing and Modules Use classes & functions defined in another file A Python module is a file with
More informationOverview of OOP. Dr. Zhang COSC 1436 Summer, /18/2017
Overview of OOP Dr. Zhang COSC 1436 Summer, 2017 7/18/2017 Review Data Structures (list, dictionary, tuples, sets, strings) Lists are enclosed in square brackets: l = [1, 2, "a"] (access by index, is mutable
More informationPositional, keyword and default arguments
O More on Python n O Functions n Positional, keyword and default arguments in repl: >>> def func(fst, snd, default="best!"):... print(fst, snd, default)... >>> func(snd='is', fst='python') ('Python', 'is',
More informationCSE : Python Programming. Decorators. Announcements. The decorator pattern. The decorator pattern. The decorator pattern
CSE 399-004: Python Programming Lecture 12: Decorators April 9, 200 http://www.seas.upenn.edu/~cse39904/ Announcements Projects (code and documentation) are due: April 20, 200 at pm There will be informal
More informationCS 11 python track: lecture 4
CS 11 python track: lecture 4 Today: More odds and ends assertions "print >>" syntax more on argument lists functional programming tools list comprehensions More on exception handling More on object-oriented
More informationObject oriented programming
Object oriented programming In object oriented programming programs are built of classes that describe objects or concepts which we normally can associate to in the real world. It could be persons, buildings,
More informationCSC148: Week 1
CSC148: Week 1 http://www.cdf.utoronto.ca/~csc148h/summer/ Sophia Huynh Summer 2018 1 Outline Introduction Object-Oriented Design 2 Your instructor Sophia Huynh Master's Student Undergrad was done at UofT
More informationCIS192 Python Programming
CIS192 Python Programming Introduction Robert Rand University of Pennsylvania September 16, 2015 Robert Rand (University of Pennsylvania) CIS 192 September 16, 2015 1 / 21 Outline 1 Object Orientation
More informationLecture 21. Programming with Subclasses
Lecture 21 Programming with Subclasses Announcements for Today Reading Today: See reading online Tuesday: Chapter 7 Prelim, Nov 10 th 7:30-9:00 Material up to Today Review has been posted Recursion + Loops
More informationWhat is a class? Responding to messages. Short answer 7/19/2017. Code Listing 11.1 First Class. chapter 11. Introduction to Classes
chapter 11 Code Listing 11.1 First Class Introduction to Classes What is a class? If you have done anything in computer science before, you likely will have heard the term object oriented programming (OOP)
More informationCS-202 Introduction to Object Oriented Programming
CS-202 Introduction to Object Oriented Programming California State University, Los Angeles Computer Science Department Lecture III Inheritance and Polymorphism Introduction to Inheritance Introduction
More informationCOMP519 Web Programming Lecture 21: Python (Part 5) Handouts
COMP519 Web Programming Lecture 21: Python (Part 5) Handouts Ullrich Hustadt Department of Computer Science School of Electrical Engineering, Electronics, and Computer Science University of Liverpool Functions
More informationProgramming I. Course 9 Introduction to programming
Programming I Course 9 Introduction to programming What we talked about? Modules List Comprehension Generators Recursive Functions Files What we talk today? Object Oriented Programming Classes Objects
More informationCS 6456 OBJCET ORIENTED PROGRAMMING IV SEMESTER/EEE
CS 6456 OBJCET ORIENTED PROGRAMMING IV SEMESTER/EEE PART A UNIT I 1. Differentiate object oriented programming from procedure oriented programming. 2. Define abstraction and encapsulation. 3. Differentiate
More informationCS61A Lecture 21. Amir Kamil UC Berkeley March 11, 2013
CS61A Lecture 21 Amir Kamil UC Berkeley March 11, 2013 Announcements HW7 due on Wednesday Ants project out Looking Up Names Name expressions look up names in the environment Dot expressions look
More informationCIS192 Python Programming
CIS192 Python Programming Object-Oriented Programming Robert Rand University of Pennsylvania February 10, 2016 Robert Rand (University of Pennsylvania) CIS 192 February 10, 2016 1 / 25 Outline 1 Object
More informationLecture 18. Classes and Types
Lecture 18 Classes and Types Announcements for Today Reading Today: See reading online Tuesday: See reading online Prelim, Nov 6 th 7:30-9:30 Material up to next class Review posted next week Recursion
More informationIterators & Generators
Iterators & Generators Sequences A sequence is something that you can: Index into Get the length of What are some examples of sequences? Sequences We ve been working with sequences all semester! Examples:
More informationSoftware Development Python (Part B)
Software Development Python (Part B) Davide Balzarotti Eurecom 1 List Comprehension It is a short way to construct a list based on the content of other existing lists Efficient Elegant Concise List comprehensions
More informationIntroduction. We've seen Python useful for. This lecture discusses Object Oriented Programming. Simple scripts Module design
Introduction We've seen Python useful for Simple scripts Module design This lecture discusses Object Oriented Programming Better program design Better modularization What is an object? An object is an
More informationObject Oriented Programming in Python. Richard P. Muller Materials and Process Simulations Center California Institute of Technology June 1, 2000
Object Oriented Programming in Python Richard P. Muller Materials and Process Simulations Center California Institute of Technology June 1, 2000 Introduction We've seen Python useful for Simple Scripts
More information61A Lecture 2. Friday, August 28, 2015
61A Lecture 2 Friday, August 28, 2015 Names, Assignment, and User-Defined Functions (Demo) Types of Expressions Primitive expressions: 2 add 'hello' Number or Numeral Name String Call expressions: max
More informationCSE : Python Programming
CSE 399-004: Python Programming Lecture 2: Data, Classes, and Modules January 22, 2007 http://www.seas.upenn.edu/~cse39904/ Administrative things Teaching assistant Brian Summa (bsumma @ seas.upenn.edu)
More information1 Classes. 2 Exceptions. 3 Using Other Code. 4 Problems. Sandeep Sadanandan (TU, Munich) Python For Fine Programmers May 16, / 19
1 Classes 2 Exceptions 3 Using Other Code 4 Problems Sandeep Sadanandan (TU, Munich) Python For Fine Programmers May 16, 2009 1 / 19 Start with an Example Python is object oriented Everything is an object
More informationA Little Python Part 3
A Little Python Part 3 Introducing Programming with Python I/O, Files, Object Classes, Exception Handling Outline I/O Files opening File I/O, reading writing Python Objects Defining a new object Inheritance
More informationCS 11 python track: lecture 2
CS 11 python track: lecture 2 Today: Odds and ends Introduction to object-oriented programming Exception handling Odds and ends List slice notation Multiline strings Docstrings List slices (1) a = [1,
More informationFundamentals of Programming. Week 11 - Lecture 1: OOP Part 2.
15-112 Fundamentals of Programming Week 11 - Lecture 1: OOP Part 2. March 29, 2016 >> Inheritance Today s Menu (Wrapping up OOP) - Employee and Student as subclasses of Person - isintance( ) vs type( )
More informationEffective Programming Practices for Economists
Effective Programming Practices for Economists 14. Object-oriented programming Hans-Martin von Gaudecker Department of Economics, Universität Bonn Revisiting abstractions Reminder of the example Reconsider
More informationCSI33 Data Structures
Outline Department of Mathematics and Computer Science Bronx Community College August 29, 2018 Outline Outline 1 Chapter 2: Data Abstraction Outline Chapter 2: Data Abstraction 1 Chapter 2: Data Abstraction
More informationPython A Technical Introduction. James Heliotis Rochester Institute of Technology December, 2009
Python A Technical Introduction James Heliotis Rochester Institute of Technology December, 2009 Background & Overview Beginnings Developed by Guido Van Rossum, BDFL, in 1990 (Guido is a Monty Python fan.)
More informationUser Defined Types. Babes-Bolyai University Lecture 06. Lect Phd. Arthur Molnar. User defined types. Python scope and namespace
? User Defined Types Babes-Bolyai University arthur@cs.ubbcluj.ro Overview? 1? 2 3 ? NB! Types classify values. A type denotes a domain (a set of values) operations on those values. ? Object oriented programming
More informationChapter 5 Object-Oriented Programming
Chapter 5 Object-Oriented Programming Develop code that implements tight encapsulation, loose coupling, and high cohesion Develop code that demonstrates the use of polymorphism Develop code that declares
More informationLecture Contents CS313D: ADVANCED PROGRAMMING LANGUAGE. What is Inheritance?
CS313D: ADVANCED PROGRAMMING LANGUAGE Computer Science department Lecture 5: Inheritance & Polymorphism Lecture Contents 2 What is Inheritance? Super-class & sub class Protected members Creating subclasses
More informationOBJECT ORIENTED PROGRAMMING
OBJECT ORIENTED PROGRAMMING (download slides and.py files follow along!) 6.0001 LECTURE 8 6.0001 LECTURE 8 1 OBJECTS Python supports many different kinds of data 1234 3.14159 "Hello" [1, 5, 7, 11, 13]
More informationCS313D: ADVANCED PROGRAMMING LANGUAGE
CS313D: ADVANCED PROGRAMMING LANGUAGE Computer Science department Lecture 4(b): Inheritance & Polymorphism Lecture Contents What is Inheritance? Super-class & sub class The object class Using extends keyword
More informationCS313D: ADVANCED PROGRAMMING LANGUAGE
CS313D: ADVANCED PROGRAMMING LANGUAGE Computer Science department Lecture 5: Inheritance & Polymorphism Lecture Contents 2 What is Inheritance? Super-class & sub class Protected members Creating subclasses
More informationData Structures (list, dictionary, tuples, sets, strings)
Data Structures (list, dictionary, tuples, sets, strings) Lists are enclosed in brackets: l = [1, 2, "a"] (access by index, is mutable sequence) Tuples are enclosed in parentheses: t = (1, 2, "a") (access
More informationWhat is a Class? Short Answer. Responding to Messages. Everything in Python is an Object 11/8/2010
The Practice of Computing Using PYTHON William Punch Richard Enbody Chapter 11 Introduction to Classes class Student(object): """Simple Student class.""" def init (self,first='', last='', id=0): # init
More informationPREPARING FOR PRELIM 2
PREPARING FOR PRELIM 2 CS 1110: FALL 2012 This handout explains what you have to know for the second prelim. There will be a review session with detailed examples to help you study. To prepare for the
More informationLecture 3 - Overview. Object-oriented programming and classes Operators Very briefly about naming conventions Graphical user interfaces (GUIs)
Lecture 3 - Overview Object-oriented programming and classes Operators Very briefly about naming conventions Graphical user interfaces (GUIs) Object-oriented philosophy Object = Data + Algorithm An object
More informationPython OOP. Stéphane Vialette. LIGM, Université Paris-Est Marne-la-Vallée. October 19, 2010
Python OOP Stéphane Vialette LIGM, Université Paris-Est Marne-la-Vallée October 19, 2010 Stéphane Vialette (LIGM, Université Paris-Est Marne-la-Vallée) Python OOP October 19, 2010 1 / 59 Outline 1 Introduction
More informationLecture 20. Subclasses & Inheritance
Lecture 20 Subclasses & Inheritance Announcements for Today Reading Today: Chapter 18 Online reading for Thursday Prelim, Nov 9 th 7:30-9:00 Material up to Thursday Review posted on Thursday Recursion
More informationWeek 2. Classes and Objects
Week 2 Classes and Objects Special thanks to Scott Shawcroft, Ryan Tucker, and Paul Beck for their work on these slides. Except where otherwise noted, this work is licensed under: http://creativecommons.org/licenses/by-nc-sa/3.0
More informationObject Oriented Programming Enthought, Inc. 97
Object Oriented Programming 97 Classes A reusable collection of behavior and data Definition Subclasses Properties 98 Modeling a Power Plant ATTRIBUTES # Data that describes the # modeled "object" name:
More informationQuestion 1. tmp = Stack() # Transfer every item from stk onto tmp. while not stk.is_empty(): tmp.push(stk.pop())
Note to Students: This file contains sample solutions to the term test together with the marking scheme and comments for each question. Please read the solutions and the marking schemes and comments carefully.
More informationChapter 7. Inheritance
Chapter 7 Inheritance Introduction to Inheritance Inheritance is one of the main techniques of objectoriented programming (OOP) Using this technique, a very general form of a class is first defined and
More informationWhat is Inheritance?
Inheritance 1 Agenda What is and Why Inheritance? How to derive a sub-class? Object class Constructor calling chain super keyword Overriding methods (most important) Hiding methods Hiding fields Type casting
More informationObjects and Classes. You create a class object by executing a class statement, e.g.:
ch04_57-92 Page 57 Monday, October 1, 2001 12:38 PM 4 Objects and Classes This chapter presents details on Python s classes and inheritance, the facilities essential for object-oriented programming. The
More informationAbstract Data Types. CS 234, Fall Types, Data Types Abstraction Abstract Data Types Preconditions, Postconditions ADT Examples
Abstract Data Types CS 234, Fall 2017 Types, Data Types Abstraction Abstract Data Types Preconditions, Postconditions ADT Examples Data Types Data is stored in a computer as a sequence of binary digits:
More informationLecture 15: Intro to object oriented programming (OOP); Linked lists
Extended Introduction to Computer Science CS1001.py Lecture 15: Intro to object oriented programming (OOP); Linked lists Instructors: Daniel Deutch, Amir Rubinstein Teaching Assistants: Michal Kleinbort,
More informationCMSC201 Computer Science I for Majors
CMSC201 Computer Science I for Majors Lecture 25 Classes All materials copyright UMBC and Dr. Katherine Gibson unless otherwise noted Run time Last Class We Covered Run time of different algorithms Selection,
More informationPaytm Programming Sample paper: 1) A copy constructor is called. a. when an object is returned by value
Paytm Programming Sample paper: 1) A copy constructor is called a. when an object is returned by value b. when an object is passed by value as an argument c. when compiler generates a temporary object
More informationLecture 19: Subclasses & Inheritance (Chapter 18)
http://www.cs.cornell.edu/courses/cs1110/2018sp Lecture 19: Subclasses & Inheritance (Chapter 18) CS 1110 Introduction to Computing Using Python [E. Andersen, A. Bracy, D. Gries, L. Lee, S. Marschner,
More informationCIS192 Python Programming
CIS192 Python Programming Generators Exceptions and IO Eric Kutschera University of Pennsylvania February 13, 2015 Eric Kutschera (University of Pennsylvania) CIS 192 February 13, 2015 1 / 24 Outline 1
More informationHarness the power of Python magic methods and lazy objects.
Harness the power of Python magic methods and lazy objects. By Sep Dehpour Aug 2016 zepworks.com sep at zepworks.com https://github.com/seperman/redisworks Lazy Loading Defer initialization of an object
More informationPython Crash-Course. C. Basso. Dipartimento di Informatica e Scienze dell Informazione Università di Genova. December 11, 2007
Python Crash-Course C. Basso Dipartimento di Informatica e Scienze dell Informazione Università di Genova December 11, 2007 Basso (DISI) Python Crash-Course December 11, 2007 1 / 26 What is Python? Python
More informationCSC326 Meta Programming i. CSC326 Meta Programming
i CSC326 Meta Programming ii REVISION HISTORY NUMBER DATE DESCRIPTION NAME 1.0 2011-09 JZ iii Contents 1 Agenda 1 2 Class Factory 1 3 Meta Class 1 4 Decorator 2 5 Misuse of Decorators 3 6 Using Decorators
More informationCMSC201 Computer Science I for Majors
CMSC201 Computer Science I for Majors Lecture 16 Classes Prof. Jeremy Dixon Based on slides from http://www.csee.umbc.edu/courses/691p/notes/python/python3.ppt Last Class We Covered Review of Functions
More informationCIS192 Python Programming
CIS192 Python Programming Iterators, Generators, Exceptions & IO Raymond Yin University of Pennsylvania September 28, 2016 Raymond Yin (University of Pennsylvania) CIS 192 September 28, 2016 1 / 26 Outline
More informationINTERPRETERS 8. 1 Calculator COMPUTER SCIENCE 61A. November 3, 2016
INTERPRETERS 8 COMPUTER SCIENCE 61A November 3, 2016 1 Calculator We are beginning to dive into the realm of interpreting computer programs that is, writing programs that understand other programs. In
More informationCIS192 Python Programming
CIS192 Python Programming Object Oriented Programming Harry Smith University of Pennsylvania February 15, 2016 Harry Smith (University of Pennsylvania) CIS 192 Lecture 5 February 15, 2016 1 / 26 Outline
More informationExceptions. raise type(message) raise Exception(message)
Classes Special thanks to Roy McElmurry, Scott Shawcroft, Ryan Tucker, and Paul Beck for their work on these slides. Except where otherwise noted, this work is licensed under: http://creativecommons.org/licenses/by-nc-sa/.0
More informationReview 3. Exceptions and Try-Except Blocks
Review 3 Exceptions and Try-Except Blocks What Might You Be Asked Create your own Exception class Write code to throw an exception Follow the path of a thrown exception Requires understanding of try-except
More informationRecall. Key terms. Review. Encapsulation (by getters, setters, properties) OOP Features. CSC148 Intro. to Computer Science
CSC148 Intro. to Computer Science Lecture 3: designing classes, special methods, composition, inheritance, Stack, Sack Amir H. Chinaei, Summer 2016 Office Hours: R 10-12 BA4222 ahchinaei@cs.toronto.edu
More informationWhat's New in Python 2.2
What's New in Python 2.2 LinuxWorld - New York City - January 2002 Guido van Rossum Director of PythonLabs at Zope Corporation guido@python.org guido@zope.com Overview Appetizers Nested Scopes Int/Long
More informationPC204 Lecture 8. Conrad Huang Genentech Hall, N453A x6-0415
PC204 Lecture 8 Conrad Huang conrad@cgl.ucsf.edu Genentech Hall, N453A x6-0415 Topics Homework review Review of OOP Inheritance Polymorphism Homework Review 7.1 Rectangle methods 7.2 Rectangle add method
More informationCS200: Advanced OO in Java
Object Oriented Programming CS200: Advanced OO in Java n Programming paradigm using Objects : data structures consisting of data fields and methods together with their interaction. n Object? n Class? n
More informationLecture 17: Classes (Chapter 15)
http://www.cs.cornell.edu/courses/cs1110/018sp Lecture 17: Classes (Chapter 15) CS 1110 Introduction to Computing Using Python [E. Andersen, A. Bracy, D. Gries, L. Lee, S. Marschner, C. Van Loan, W. White]
More informationFriday, 11 April 14. Advanced methods for creating decorators Graham Dumpleton PyCon US - April 2014
Advanced methods for creating decorators Graham Dumpleton PyCon US - April 2014 Intermission Rant about the history of this talk and why this topic matters. Python decorator syntax @function_wrapper def
More informationDescriptor HowTo Guide Release 3.3.3
Descriptor HowTo Guide Release 3.3.3 Guido van Rossum Fred L. Drake, Jr., editor November 17, 2013 Python Software Foundation Email: docs@python.org Contents 1 Abstract ii 2 Definition and Introduction
More informationPyTrie Documentation. Release 0.3. George Sakkis
PyTrie Documentation Release 0.3 George Sakkis Jun 05, 2017 Contents 1 Usage 3 2 Reference documentation 5 2.1 Classes.................................................. 5 2.2 Trie methods...............................................
More informationCP215 Application Design
CP215 Application Design New ATLAS humanoid robot: https://youtu.be/rvlhmgqgdky Tech News! Tech News! New ATLAS humanoid robot: https://youtu.be/rvlhmgqgdky Spotify moving data to Google Cloud Hacker's
More informationPREPARING FOR THE FINAL EXAM
PREPARING FOR THE FINAL EXAM CS 1110: FALL 2012 This handout explains what you have to know for the final exam. Most of the exam will include topics from the previous two prelims. We have uploaded the
More informationAt full speed with Python
At full speed with Python João Ventura v0.1 Contents 1 Introduction 2 2 Installation 3 2.1 Installing on Windows............................ 3 2.2 Installing on macos............................. 5 2.3
More informationCIS192 Python Programming
CIS192 Python Programming Iterators, Generators, IO, and Exceptions Harry Smith University of Pennsylvania February 15, 2018 Harry Smith (University of Pennsylvania) CIS 192 Lecture 5 February 15, 2018
More informationPython for Finance. Advanced Features. Andras Niedermayer
Python for Finance Advanced Features Andras Niedermayer Objects of Interest object oriented programming (Wikipedia) Definition (Object-oriented Programming) Object-oriented programming (OOP) is a programming
More informationa declaration of class name, and a class docstring
Question 1. [10 marks] Implement a class that models a cash register in a store. This cash register will know what the HST tax rate is (charged on all sales, for simplicity), is able to make sales, and
More informationCS61A Lecture 15 Object Oriented Programming, Mutable Data Structures. Jom Magrotker UC Berkeley EECS July 12, 2012
CS61A Lecture 15 Object Oriented Programming, Mutable Data Structures Jom Magrotker UC Berkeley EECS July 12, 2012 COMPUTER SCIENCE IN THE NEWS http://www.iospress.nl/ios_news/music to my eyes device converting
More informationCS108 Lecture 16: User Defined Classes. Overview/Questions
CS108 Lecture 16: User Defined Classes Aaron Stevens 23 February 2009 1 Overview/Questions Review: the function of functions Thinking about program structure Review: objects and classes How do we design
More informationClasses and Objects 1
Classes and Objects 1 Built-in objects You are already familiar with several kinds of objects: strings, lists, sets, tuples, and dictionaries An object has two aspects: Some fields (or instance variables)
More informationCOMPSCI 105 S Principles of Computer Science. Classes 3
S2 2017 Principles of Computer Science Classes 3 Exercise } Exercise } Create a Student class: } The Student class should have three attributes: id, last_name, and first_name. } Create a constructor to
More informationTeenCoder : Java Programming (ISBN )
TeenCoder : Java Programming (ISBN 978-0-9887070-2-3) and the AP * Computer Science A Exam Requirements (Alignment to Tennessee AP CS A course code 3635) Updated March, 2015 Contains the new 2014-2015+
More informationDangerously Advanced Python
Dangerously Advanced Python Mike Verdone for Protospace, Calgary May 2009 http://mike.verdone.ca/ Introspection and Metaprogramming Introspection: Programs that can interrogate their own data structures
More informationhttps://lambda.mines.edu Object oriented programming is a type of programming with objects that maintain internal state and pass messages between each other. First appeared in the mid-1960s in Simula:
More informationCOMSC-051 Java Programming Part 1. Part-Time Instructor: Joenil Mistal
COMSC-051 Java Programming Part 1 Part-Time Instructor: Joenil Mistal Chapter 4 4 Moving Toward Object- Oriented Programming This chapter provides a provides an overview of basic concepts of the object-oriented
More informationOutline. the try-except statement the try-finally statement. exceptions are classes raising exceptions defining exceptions
Outline 1 Exception Handling the try-except statement the try-finally statement 2 Python s Exception Hierarchy exceptions are classes raising exceptions defining exceptions 3 Anytime Algorithms estimating
More informationCPSC 217-T03/T08. Functions Ruting Zhou
CPSC 217-T03/T08 Functions Ruting Zhou STORED (AND REUSED) STEPS def hello(): Program: print 'Hello' hello() print Zip print 'Fun' def hello(): print('hello ) print('fun ) hello() Print( 'Zip'hello())
More informationLecture #15: Generic Functions and Expressivity. Last modified: Wed Mar 1 15:51: CS61A: Lecture #16 1
Lecture #15: Generic Functions and Expressivity Last modified: Wed Mar 1 15:51:48 2017 CS61A: Lecture #16 1 Consider the function find: Generic Programming def find(l, x, k): """Return the index in L of
More informationPREPARING FOR THE FINAL EXAM
PREPARING FOR THE FINAL EXAM CS 1110: FALL 2017 This handout explains what you have to know for the final exam. Most of the exam will include topics from the previous two prelims. We have uploaded the
More informationASSIGNMENT NO 13. Objectives: To learn and understand concept of Inheritance in Java
Write a program in Java to create a player class. Inherit the classes Cricket_player, Football_player and Hockey_player from player class. The objective of this assignment is to learn the concepts of inheritance
More informationFun with Python Descriptors
Fun with Python Descriptors Author: Jeff Rush Date: 2006-11-25 include directive disabled... include:: Overview What are descriptors? Implementation: attribute watcher Implementation: property()
More informationLecture 5. Introduction to Python! Lecture 5
Lecture 5 Introduction to Python Lecture 5 Summary OOP Concepts Object trees Classes Attributes Methods OOP OOP Inheritance Composition Allows a class to inherit the characteristics and behaviour as another
More information