Python Intro For Managers

Python: a Powerful, Easy-to-Use, Open-Source Scripting Language Stephen Ferg Bureau of Labor Statistics

What we're going to talk about...

[object Object],[object Object],[object Object],Executive Summary Time, money, and innovative energy... can be saved. Productivity, speed, and quality ... can be improved.

Topics ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]

What is a "scripting" language? ,[object Object],[object Object],[object Object],[object Object],[object Object]

In the beginning... ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]

"Little Languages" appear... ,[object Object],[object Object],[object Object]

Scripting languages evolve ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],Many have higher-level object-oriented features that make them powerful application development languages in their own right.

The defining characteristic of scripting languages... ,[object Object]

[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],Programmers can write roughly the same number of lines of code per year regardless of language. Productivity = the number of machine instructions that a programmer can produce per year.

None Strong Degree of Typing Assembler System Languages Scripting Languages VB Python, Perl, Ruby, TCL C C++ Java Instructions/Statement 1000 100 10 1 Language Levels and Productivity From "Scripting: Higher Level Programming for the 21st Century" by John K. Ousterhout. This version prepared by Dana Moore and updated by Stephen Ferg

This leads to... increasing use of scripting languages.

John Ousterhout ,[object Object],Scripting languages represent a different set of tradeoffs than system programming languages. They give up execution speed and strong typing but provide significantly higher programmer productivity and software reuse. This tradeoff makes increasing sense as computers become faster and cheaper compared to programmers. For the last fifteen years a fundamental change has been occurring in the way people write computer programs. ...from system programming languages to scripting languages. This article explains why scripting languages will handle many of the programming tasks of the next century better than system programming languages.

Robert C. Martin ,[object Object],[object Object]

Tim O'Reilly ,[object Object],[object Object],Why Scripting Languages Matter

Agile programming languages ,[object Object],[object Object],[object Object],[object Object],[object Object],Kevin Altis and Ward Cunningham

Python - a great agile programming language! ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]

Python language features ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]

Python's most obvious feature ,[object Object],no DO.. END no BEGIN..END no { .. }

Indentation as a control-structure ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],0 Bingo! --- --- --- 3 --- --- --- 6 --- --- --- 9 --- --- --- 12 --- --- --- 15 Bingo! --- --- --- 18 --- ---

Sample Python Code ,[object Object],For a quick overview of Python's features: http://www.ferg.org/python_slides/index.html

Python's advantages ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]

Python – some history ,[object Object],[object Object],[object Object],A fan of Monty Python's Flying Circus

Guido van Rossum ,[object Object],[object Object],[object Object]

"Doctor Fun has the dubious distinction of being the first web cartoon. Doctor Fun was not, however, the first cartoon on the Internet." - http:// www.ibiblio.org/Dave/index.html

T-shirt Slogan ,[object Object],[object Object]

Who is using Python? What are they doing with it? ,[object Object],[object Object]

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[object Object],[object Object],Should we be using Python? ....

Issues to Consider when Evaluating a Programming Language Let's look at some...

Are capabilities an issue? ,[object Object],[object Object],[object Object],Frank Stajano

The Python Standard Library ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]

Is execution speed an issue? ,[object Object],[object Object],[object Object],[object Object],Probably 10 times slower than a system language, but ...

[object Object],An empirical comparison of C, C++, Java, Perl, Python, Rexx, and Tcl for a search/string-processing program University of Karlsruhe, Germany Technical Report 2000-5, March 10, 2000 http:// wwwipd.ira.uka.de/~prechelt/Biblio/jccpprtTR.pdf

[object Object],[object Object],[object Object],Is dynamic typing an issue?

Is productivity an issue? ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]

"Programming is fun again!" ,[object Object],[object Object],[object Object],[object Object]

Is maintainability an issue? ,[object Object],[object Object],[object Object],[object Object]

Is weirdness an issue? ,[object Object],[object Object],[object Object]

How weird is it, really? ,[object Object],[object Object],Mark Lutz, author of Programming Python

Is support an issue? ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]

What is "Open-Source"? ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]

The Cathedral & the Bazaar ,[object Object],[object Object]

Some open-source products ,[object Object],[object Object],[object Object],[object Object],Apache has overwhelmingly dominated the Web server market since 1996. PHP is the most popular Apache module, running on almost 10 million domains (over a million IP addresses). "MySQL threatens to do for databases what Linux has done for operating systems." – Tim O'Reilly "LAMP"

Is Open-Source software used in the Federal Government? ,[object Object],[object Object],[object Object],[object Object],Why would a Federal agency use open-source software? ...

eGov & Open-Source ,[object Object],[object Object],[object Object],[object Object],[object Object]

[object Object],[object Object],[object Object],*NIAP: National Information Assurance Partnership – NIST security certification

So... Is Open-Source Safe ? ,[object Object],[object Object],[object Object]

[object Object],[object Object],The Bottom Line

Is vendor longevity an issue? ,[object Object]

The Python Software Foundation ,[object Object],[object Object],[object Object],[object Object]

Is mindshare an issue? ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],The Python community is very active and growing rapidly

Newsgroup Activity comp.lang.* December 2002 ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],Statistics compiled by Aaron K. Johnson.

TIOBE Popularity of Programming Languages Index July 2003 based on the number of hits returned by a Google search ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],Index is available at http://www.tiobe.com/tpci.htm

Is online support an issue? ,[object Object],[object Object],[object Object]

Consulting and Training Resources? ,[object Object],[object Object],[object Object],[object Object],[object Object]

Is Ease-of-Learning an issue? ,[object Object],[object Object],[object Object]

Online Materials? ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]

Tools? - IDEs ,[object Object],[object Object],$35 and $180 -- http://wingide.com/

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Tools? – Screen Painters ,[object Object]

What Do the Experts Think of Python?

Bruce Eckel ,[object Object],Thinking in Java received Java World Reader's Choice Award and Java World Editor's Choice Award for best book, the Java Developer's Journal Editor's Choice Award for books, the Software Development Productivity Award in 1999, the third edition received the Software Development Magazine Jolt award for best technical book, 2002. One of "the industry's leading lights" ( Windows Tech Journal , September 1996).

Python & “The Tipping Point” ,[object Object],[object Object]

Eric S. Raymond ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],Well-known Unix guru, Linux advocate, and author

[object Object],[object Object],http://pythonology.org/success&story=esr Why Python?

Martin C. Brown ,[object Object],[object Object],[object Object],[object Object]

Nicholas Petreley ComputerWorld columnist ,[object Object],[object Object]

The Bottom Line... ,[object Object],[object Object],[object Object],[object Object]

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[object Object],An application is written in four different languages (Java, C, Perl, and Unix shell-script) because it was built by four different developers who were expert in four different languages. Everybody knows this is a problem, but nobody has time to learn another language. One solution -- a single common language that is both powerful enough to handle a wide variety of tasks, and easy enough to learn quickly and easily.

More Online Information ,[object Object],[object Object],[object Object],[object Object],[object Object]

Python Intro For Managers

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