Introduction to Python on IBM i - OMNI User

1 1 2017 Rogue Wave Software, Inc. All Rights to Python on IBM i2 2017 Rogue Wave Software, Inc. All Rights A little about Python Why use Python ? How to install/determine if installed Syntax101 Variables Strings Functions Command Line DB2 Data Access3 2017 Rogue Wave Software, Inc. All Rights Kevin Adler Tony Cairns Jesse Gorzinski Google Memegenerator Corn chips & salsa Clean socks and, of course, spam4 2017 Rogue Wave Software, Inc. All Rights you freak out Why isn t Mike talking about PHP? Zend WAS the PHP company Rogue Wave IS the Open Source company Support for 300+ Open Source projects And, of course, PHP 5 2017 Rogue Wave Software, Inc. All Rights little about Python6 2017 Rogue Wave Software, Inc. All Rights is it really?

2 Generalpurposeprogramminglanguage Easytogetstarted Simplesyntax Greatforintegrations AccesstoCandotherAPI Infrastructurefirst, : TahaniAlamanie7 2017 Rogue Wave Software, Inc. All Rights PythonwasconceptualizedbyGuidoVanRossumi nthelate1980s. RossumpublishedthefirstversionofPythonco de( )inFebruary1991attheCWI(CentrumWiskunde& Informatica)intheNetherlands,Amsterdam. PythonisderivedfromABCprogramminglanguag e,whichisageneral-purposeprogramminglang uagethathadbeendevelopedattheCWI. Rossumchosethename" Python ",sincehewasabi gfanofMontyPython'sFlyingCircus. Pythonisnowmaintainedbyacoredevelopmentt eamattheinstitute, : TahaniAlamanie8 2017 Rogue Wave Software, Inc. All Rights lineage Python 1 1994 Python 2 2000 (Not dead ) -2010 Python 3 2008 2015 March 20179 2017 Rogue Wave Software, Inc.

3 All Rights 2 or 3?10 2017 Rogue Wave Software, Inc. All Rights s the diff? Example: Python 2 print statement replaced by function: Python2 print "Hello World!" Python3 -print("Hello World!") Many more differences, 2017 Rogue Wave Software, Inc. All Rights use it?12 2017 Rogue Wave Software, Inc. All Rights RPG is 45, COBOL is 25, 2017 Rogue Wave Software, Inc. All Rights reasons folks use Python Open source is free, right? Yes, sort No charge LP on IBM i 5733 OPS Only scripting language to support multiple inheritance Multi-threading Stateful, not Asynclike Node But same motivation as Node, non-blocking Applications develop faster Extensive standard library that is constantly evolving Frameworks such as Bottle14 2017 Rogue Wave Software, Inc.

4 All Rights using Python Technology Geospatial, Machine Learning Honeywell -Build automation Manufacturing D-Link updates Multithreaded Phillips Robot programming and sequencing Entertainment ILM Scripting CGI Intensive films Video gaming Transportation Airports Frequentisfor weather info US, Denmark, Iceland, Hong Kong, etc. 15 2017 Rogue Wave Software, Inc. All Rights using Python YouTube -Backend Facebook (see next slide) Dropbox NASA Weather and more IBM Mozilla Instagram Red Quora Why Python ?16 2017 Rogue Wave Software, Inc. All Rights in detail Top three languages Hack (fork of PHP) C++ Python Infrastructure management Network switch setup Core services (DNS, etc,) Server imaging, burnin-in. Platform services: Job Engine, team workflow 2017 Rogue Wave Software, Inc.

5 All Rights Python ?18 2017 Rogue Wave Software, Inc. All Rights at #!/wiki/IBM%20i%20 Technology%20 Updates/page/Open%20 Source%20 Technologies19 2017 Rogue Wave Software, Inc. All Rights one? Python 3 is LPP option 2 Python 2 is LPP option 4 Correct answer: It Many existing libraries are Python 2 But 90%+ are also Python 3 compliant, or on their way Python will retire in less than 3 years (EOL==2020)20 2017 Rogue Wave Software, Inc. All Rights Licensed Programs 5733 OPS Base and option 2 or 421 2017 Rogue Wave Software, Inc. All Rights in action Command line via green screen (CALL QP2 TERM)22 2017 Rogue Wave Software, Inc. All Rights world?23 2017 Rogue Wave Software, Inc. All Rights prefer SSH Command line via SSH terminal24 2017 Rogue Wave Software, Inc.

6 All Rights World, again?25 2017 Rogue Wave Software, Inc. All Rights 2017 Rogue Wave Software, Inc. All Rights Studio No, you don t need to buy Zend Studio Use Orion, etc. But if you have Studio or Consider something from I grabbed PyDev27 2017 Rogue Wave Software, Inc. All Rights 2017 Rogue Wave Software, Inc. All Rights to IBM iwhen learning What s that? The boss won t let you install Python ? Consider 29 2017 Rogue Wave Software, Inc. All Rights to IBM iwhen learning How about your PC? Gotothe Python site: Download Install Viola!30 2017 Rogue Wave Software, Inc. All Rights PyDevfrom Eclipse31 2017 Rogue Wave Software, Inc. All Rights URL Follow prompts32 2017 Rogue Wave Software, Inc. All Rights for Eclipse Select what you like Next33 2017 Rogue Wave Software, Inc.

7 All Rights versions Next34 2017 Rogue Wave Software, Inc. All Rights terms and EULA Finish35 2017 Rogue Wave Software, Inc. All Rights the pretty status bar36 2017 Rogue Wave Software, Inc. All Rights in Eclipse ( Zend Studio) I bet RDiworks, too!37 2017 Rogue Wave Software, Inc. All Rights Create a file like Open the file Key up some code and click save38 2017 Rogue Wave Software, Inc. All Rights Change the file Click save Back to qp2term & F939 2017 Rogue Wave Software, Inc. All Rights 2017 Rogue Wave Software, Inc. All Rights is it written Indentation means EVERYTHING Don t use tab 4 spaces is the best practice Mismatched indents can cause failures. Good luck Mismatched spaces and tabs will cause failures No need for scope terminators like other languages Colon introduces start block, then indent Much more readable than other languages Get a good editor!

8 !!41 2017 Rogue Wave Software, Inc. All Rights 2017 Rogue Wave Software, Inc. All Rights Similar to Java, PHP, C, etc. Comparison Assignment = Comparison == Inequality != Less than < Greater than > Less than or equal to <= Greater than or equal to >= Mathematical Addition + Multiplication * Division / Floor division // Modulus % Exponentiation ** Booleans And Or Not43 2017 Rogue Wave Software, Inc. All Rights 2017 Rogue Wave Software, Inc. All Rights Types that Int Integer of unlimited size Float System defined precision Complex Complex with real and imaginary parts Bool TRUE & FALSE45 2017 Rogue Wave Software, Inc. All Rights in types Str Character string composed of Unicode Bytes and bytearray Sequences of bytes List and tuple (list/array/data structure) Range Start, end, step Set & frozenset Unordered set of terms Dict Associative array (dictionary, hash map)46 2017 Rogue Wave Software, Inc.

9 All Rights on the fly Case sensitive camelCase Who are you? type()47 2017 Rogue Wave Software, Inc. All Rights in a file48 2017 Rogue Wave Software, Inc. All Rights Type?49 2017 Rogue Wave Software, Inc. All Rights variable is implemented as a class!50 2017 Rogue Wave Software, Inc. All Rights now for something completely different51 2017 Rogue Wave Software, Inc. All Rights s Monty Python references are not only They are encouraged! Documentation is littered with references Examples are well covered52 2017 Rogue Wave Software, Inc. All Rights to Variables Numbrs-3 Data Types Int1,2,42 Complex: <real> + <imaginary> (not used )53 2017 Rogue Wave Software, Inc. All Rights Immutable objects, cannot change value Can reassign.

10 (dynamic typing) Single or Double quotes, OK (even ) Index starts at 054 2017 Rogue Wave Software, Inc. All Rights formatting Interpolation, of sorts55 2017 Rogue Wave Software, Inc. All Rights Ordered group, similar to array Different data types, ok Multi-dimensional (sub lists) Mutable (changeable)56 2017 Rogue Wave Software, Inc. All Rights Similar to lists Immutable (don t change once created) Use parenthesis instead of brackets57 2017 Rogue Wave Software, Inc. All Rights Again, like lists but more like hash table Mutable Key value pairs 58 2017 Rogue Wave Software, Inc. All Rights Structures59 2017 Rogue Wave Software, Inc. All Rights 2017 Rogue Wave Software, Inc. All Rights loop61 2017 Rogue Wave Software, Inc.