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CSC 110

CSC 110. Introduction to Python [Reading: chapter 1]. What to expect in this class. Outcome: how to program in Python (algorithms, semantics/syntax, using objects, python modules, …) Class organization: Lectures, practice with sample code, homework assignments, tests and quizzes

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CSC 110

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  1. CSC 110 Introduction to Python [Reading: chapter 1]

  2. What to expect in this class • Outcome: how to program in Python (algorithms, semantics/syntax, using objects, python modules, …) • Class organization: • Lectures, practice with sample code, homework assignments, tests and quizzes • class web site • seattlecentral.edu/~flepeint/pyclass

  3. What is a computer? (1) • Programmer's viewpoint • CPU (central processing unit): the "brain" of the computer. It can perform simple tasks very fast (e.g. adding…) • Memory: where the microprocessor stores data (results of computations,…). Memory comes in many types (RAM, ROM, …) • Input/Output devices: e.g. keyboard, screen, … They allow the user to interact with the computer. • Our goal: Make the computer perform complex tasks for us. • How: Write programs.

  4. What is a computer? (2) CPU Memory Network Welcome to Python!

  5. Programming • Machine language • The CPU set of instructions: coded as a series of 0's and 1's • Fast • Machine dependent (two different CPU don't use the same machine language) • Time consuming to write programs • Instead, use a high level language • Closer to plain English. Programming is easier. (this doesn't mean easy!) • Machine independent • Can't be understood by the CPU. A translation program is required (compiler, interpreter, …)

  6. Programming languages • Thousands of programming languages (many are just for research purposes) • Historically (with many omissions!) • FORTRAN (scientific) (50's) • COBOL (business) (60's) • PASCAL, BASIC, C (multi purposes) (70's) • C++ (OOP) (80's), Java (90’s) • Python (90’s, started by Guido Van Rossum, community-backed development process, the catchy name is a reference to Monty Python)

  7. Why are we learning Python? • A modern language • object oriented • dynamic semantics • built-in data structures • extensive libraries • available on all major platforms • A good language to learn programming

  8. The present Python • Python 3.3 (2012) • Python 3: cleaned up version of Python 2 • not compatible with Python 2 • Software: many free products for all platforms (Unix, Mac, Windows…) • available at python.org • comes with a development environment (IDLE) • other IDE's available (e.g. PyDev in Eclipse)

  9. Resources • Text: “Python Programming" by J. Zelle • http://mcsp.wartburg.edu/zelle/python/ppics2/index.html • Another text: “How to think like a computer scientist” • http://www.greenteapress.com/thinkpython/thinkCSpy.pdf • Huge amount of resources on the web • check python.org

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