Getting Started with Python on IBM i - LISUGlisug.org/presentations/Python.pdf · IBM i Emerging...
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10/21/2015 1 © Copyright IBM Corporation 2015. Technical University/Symposia materials may not be reproduced in whole or in part without the prior written permission of IBM. Getting Started with Python on IBM i Jesse R. Gorzinski, MBA [email protected] IBM i Emerging Solutions IBM Corporation 1 © Copyright IBM Corporation 2015. Technical University/Symposia materials may not be reproduced in whole or in part without the prior written permission of IBM. Agenda • Introduction • Install Python on i • Use modern tools • Explore what you get • Install community packages • Hello, world! • Let's go to the web!
Transcript of Getting Started with Python on IBM i - LISUGlisug.org/presentations/Python.pdf · IBM i Emerging...
10/21/2015
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© Copyright IBM Corporation 2015. Technical University/Symposia materials may not be reproduced in whole or in part without the prior written permission of IBM.
Getting Started with Python on IBM i
Jesse R. Gorzinski, [email protected] i Emerging Solutions IBM Corporation
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may not be reproduced in whole or in part without the prior written permission of
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Agenda
• Introduction
• Install Python on i
• Use modern tools
• Explore what you get
• Install community packages
• Hello, world!
• Let's go to the web!
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What IBM i is doing
• Supporting ecosystems
• Enabling open source software (OSS) to run "out of the box"
• Enabling software engineering on open source languages/runtimes
• Enabling easy extension of OSS for IBM i
• Shipping OSS
• Contributing code to OSS
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Open Source for IBM i
• New LPO – 5733OPS Open Source for IBM i
• New license program option
• Designed for Open Source offerings on IBM i
• Provides a safe way for Open Source to be delivered on IBM i
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Open Source: a vibrant and prevalent phenomenon!
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Popularity Contest
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http://www.theregister.co.uk/2013/03/18/nvidia_continuum_pyhton_on_cuda_gpu/
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• https://www.python.org/about/success/
• 41 real-life success stories across multiple domains
Python success stories!
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Install Python on i
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• 5733-OPS has 15 options available NOW!
• The options themselves are placeholders
• Function will be delivered via PTF
5733-OPS: a bit unconventional?
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1. Install XMLSERVICEhttp://yips.idevcloud.com/wiki/index.php/XMLService/XMLSERVICEInstall
2. Install 5733OPS Option 2
3. Install latest SC1 PTF'shttps://www.ibm.com/developerworks/community/wikis/home?lang=en#!/wiki/W1c12c273752d_4cb8_b000_8375ec43426d/page/5733-SC1%20PTFs
4. Install new-function PTF'sSI57008 runtimeSI57253 SI57254 SI57255 SI57256
(or latest superceding PTF's).
5. Verify the install by running 'python3 --version' from a terminal
Installing Python on i
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DB2 connector (SI57253):
easy_install3 /QOpenSys/QIBM/ProdData/OPS/Python-pkgs/ibm_db/ibm_db-*.egg
Toolkit for IBM i (SI57254):easy_install3 /QOpenSys/QIBM/ProdData/OPS/Python-pkgs/itoolkit/itoolkit-*.egg
FastCGI gateway support (SI57255):easy_install3 /QOpenSys/QIBM/ProdData/OPS/Python-pkgs/flipflop/flipflop-*.egg
lightweight web framework (SI57256):easy_install3 /QOpenSys/QIBM/ProdData/OPS/Python-pkgs/bottle/bottle-*.egg
Installing shipped add-ons (install PTF first)
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Use modern tools
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Modern terminal
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• Use SSH!
• A good way from Windows (not the only way):
1. Install cygwin (make sure that SSH is part of install)
2. Programs Cygwin Cygwin64 Terminal
3. ssh -Y <userid>@<hostname>
(optional) 'exec bash' for a more friendly shell (in Jesse's opinion)
Can also make bash the default by following these steps:
http://www-01.ibm.com/support/docview.wss?uid=nas8N1011555
Modern terminal
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Modern terminal
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Modern text editor
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Many options
• Can map a drive, use Windows editor of choice (for example)
• Or, use nedit with X11 forwarding (topic for another day
Jesse's preferred method: Eclipse with Remote System Explorer plugin
• Easily found and installed through Eclipse Marketplace
(Help Eclipse Marketplace…)
• Then, go to "Window Open Perspective"
Modern text editor
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Remote System Explorer
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Remote System Explorer
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Explore what you get
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python3 / python3.4
This is the main Python executable.
pip3 / pip3.4
Preferred package installer.
2to3 / 2to3-3.4
Transforms Python 2.x code to Python 3.x
pydoc3 / pydoc3.4
Documentation generator
pyvenv / pyvenv-3.4
Provides support for lightweight virtual environments.
easy_install3 / easy_install-3.4
Lets you build, install, and manage Python packages. This command is used for installing shipped add-ons.
Base Python runtime
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• Provided by the ibm_db open source project
• Incredibly robust. Can do many DB2 functions!
• Conforms to Python Database API Specification v2.0
• Complete documentation can be found here:
https://code.google.com/p/ibm-db/wiki/APIs
Native DB2 connector
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QSQSRVR DB2 BCI … task 1, then task 2
Simple select statement
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Creating HTML table from a select (we'll see a screenshot later)
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Built in DB2 Services – Use SQL to get info from the system!
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PTF Services
Security Services
Work Management Services
TCP/IP Services
Storage Services
Object Services
System Health Services
Journal Services
Application Services
QSYS2.QCMDEXC()
QSYS2.DISPLAY_JOURNAL()
QSYS2.SYSLIMITS
QSYS2.OBJECT_STATISTICS()
QSYS2.SYSLIMTBL
QSYS2.USER_STORAGE
QSYS2.SYSDISKSTAT
QSYS2.SYSTMPSTG
SYSIBMADM.ENV_SYS_INFO
QSYS2.TCPIP_INFO
QSYS2.SYSTEM_VALUE_INFO
QSYS2.GET_JOB_INFO()
QSYS2.PTF_INFO
QSYS2.GROUP_PTF_INFO
QSYS2.USER_INFO
QSYS2.FUNCTION_INFO
QSYS2.FUNCTION_USAGE
QSYS2.GROUP_PROFILE_ENTRIES
QSYS2.SQL_CHECK_AUTHORITY()
QSYS2.SET_COLUMN_ATTRIBUTE()
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Built in DB2 Services – Examples
SELECT * FROM QSYS2.USER_INFO
WHERE SIGN_ON_ATTEMPTS_NOT_VALID > 0
SELECT
ASP_NUMBER,UNITNBR,PERCENT_USED
FROM QSYS2.SYSDISKSTAT
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• Three different ways to use it:
• Direct calls (like CLP)
• REST calls (local/remote)
• DB2 calls (local/remote)
Toolkit for IBM i
http://youngiprofessionals.com/wiki/index.php/XMLSERVICE/Python
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"""Configure:Requires XMSLERVICE library installed, see following link installation http://yips.idevcloud.com/wiki/index.php/XMLService/XMLSERVICE
Transports:1) XMLSERVICE direct call (current job)from itoolkit.lib.ilibcall import *itransport = iLibCall()
2) XMLSERVICE db2 call (QSQSRVR job)from itoolkit.db2.idb2call import *itransport = iDB2Call(config.user,config.password)-- or --conn = ibm_db.connect(database, user, password)itransport = iDB2Call(conn)
3) XMLSERVICE http/rest/web call (Apache job)from itoolkit.rest.irestcall import *itransport = iRestCall(url, user, password)
"""from itoolkit.lib.ilibcall import *itransport = iLibCall()
Python egg toolkit config.py
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Class list
XMLSERVICE transport - iLibCall iDB2Call iRestCallXMLSERVICE main - iToolKitXMLSERVICE call base - iBaseXMLSERVICE call *CMD or PASE - iCmd iSh iCmd5250XMLSERVICE call *PGM or *SRVPGM - iPgm iSrvPgm iParm iRet iDS iDataXMLSERVICE call DB2 - iSqlQuery iSqlPrepare iSqlExecute iSqlFetch iSqlParm iSqlFreeXMLSERVICE generic - iXml
Python egg toolkit classes
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Toolkit example: rtvjoba
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Toolkit example: DB2
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Toolkit example: DB2
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Toolkit example: *PGM
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Toolkit example: *SRVPGM
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System API
# Retrieve Hardware Resource List (QGYRHRL, QgyRtvHdwRscList) API# Service Program: QGYRHR# Default Public Authority: *USE# Threadsafe: No# Required Parameter Group:# Output Char(*)..............Receiver variable (RHRL0100, RHRL0110)# Input Binary(4).............Length of receiver variable# Input Char(8)...............Format name# Input Binary(4).............Resource category# I/O Char(*).................Error code# RHRL0100 Format# BINARY(4)...................Bytes returned# BINARY(4)...................Bytes available# BINARY(4)...................Number of resources returned# BINARY(4)...................Length of resource entry# CHAR(*).....................Resource entries# These fields repeat for each resource.# BINARY(4)...................Resource category# BINARY(4)...................Family level# BINARY(4)...................Line type# CHAR(10)....................Resource name# CHAR(4).....................Type number# CHAR(3).....................Model number# CHAR(1).....................Status# CHAR(8).....................System to which adapter is connected# CHAR(12)....................Adapter address# CHAR(50)....................Description# CHAR(24)....................Resource (liar, liar, pants on fire, binary)
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System API (input)
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System API (report)
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System API (run)
bash-4.3$ python isrvpgm_qgyrhrl.py +++ success QGYRHR QgyRtvHdwRscList
Length of receiver variable......123892Format name......................RHRL0100Resource category................3RHRL0100_t:Bytes returned.................388Bytes available................388Number of resources returned...3Length of resource entry.......124--------------------------------------------------------Resource category............3Family level.................1Line type....................-1Resource name................CMB02Type number..................268CModel number.................001Status.......................1System adapter connected.....*NONEAdapter address..............*NONEDescription..................Comm ProcessorResource kind................0000000000000001000000000000000740--------------------------------------------------------Resource category............3Family level.................2Line type....................-1Resource name................CTL01Type number..................6A59Model number.................002Status.......................1System adapter connected.....*NONEAdapter address..............*NONEDescription..................Virtual ControllerResource kind................000000000000000200000000000000010000080008--------------------------------------------------------Resource category............3Family level.................3Line type....................-1Resource name................DSP001:… so on ...
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• We ship a fastCGI gateway, built from the flipflop open source project
FastCGI gateway
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• We ship a slightly-modified version of the open-source bottle.py
• Lots of reference at http://bottlepy.org
• We'll see a small example later
Lightweight web framework
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Install community packages
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Usage:
pip3 <command> [options]
Commands:
install Install packages.
uninstall Uninstall packages.
freeze Output installed packages in requirements format.
list List installed packages.
show Show information about installed packages.
search Search PyPI for packages.
wheel Build wheels from your requirements.
zip DEPRECATED. Zip individual packages.
unzip DEPRECATED. Unzip individual packages.
bundle DEPRECATED. Create pybundles.
help Show help for commands.
General Options:
-h, --help Show help.
-v, --verbose Give more output. Option is additive, and can be used up to 3 times.
-V, --version Show version and exit.
-q, --quiet Give less output.
--log-file <path> Path to a verbose non-appending log, that only logs failures. This log is active by
default at /home/JGORZINS/.pip/pip.log.
--log <path> Path to a verbose appending log. This log is inactive by default.
--proxy <proxy> Specify a proxy in the form [user:passwd@]proxy.server:port.
--timeout <sec> Set the socket timeout (default 15 seconds).
--exists-action <action> Default action when a path already exists: (s)witch, (i)gnore, (w)ipe, (b)ackup.
--cert <path> Path to alternate CA bundle.
Using the pip3 command (install from Internet)
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Installing xlsxwriter
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xlsxwriter example
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xlsxwriter example
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• Most packages from the web are pure python packages. No compile
needed!!
• Some packages require bits of C/C++ code
• pip3 will automatically download the source, compile and install.
- By default, it will use the XL C compiler
• You will likely need to install the gcc compiler and configure according
to these steps:https://www.ibm.com/developerworks/community/wikis/home?lang=en#!/wiki/IBM%20i%20Technology%20Updates/page/Downloading
%20packages%20using%20the%20pip3%20command
pip3 and native compiles
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• Helpful hint!!!
Set the environment variable MAX_CONCURRENCY=1 to help debug
any possible compilation problems.
pip3 and native compiles
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Hello, world!
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• Interactive:
• Script:
Python interactive
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Let's go to the web!
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fastCGI (already saw this)
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http.server (included with Python)
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https://www.ibm.com/developerworks/community/wikis/home?lang=en#!/
wiki/IBM%20i%20Technology%20Updates/page/Sample%20web%20app
lication%20with%20Python
bottle.py (shipped add-on)
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• Quick, easy-to-use, lightweight web framework!
• Lets you serve up static files, images, dynamically-generate code, and
much more
bottle.py
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https://www.ibm.com/developerworks/community/wikis/home?lang=en#!/
wiki/IBM%20i%20Technology%20Updates/page/Sample%20web%20app
lication%20with%20Python
bottle (shipped add-on)
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code for DB2 query function
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Code for CL command function
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• "The web framework for perfectionists with deadlines"
• Very powerful. Has MVC frameworks built-in. Requires a database connection for keeping relationship mappings, structural data, etc
• On IBM i, one can use MySQL via Zend Dbihttps://www.ibm.com/developerworks/community/wikis/home?lang=en#!/wiki/IBM%20i%20Technology%20Updates/page/First%20Django%20web%20application
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Django example
http://lightbird.net/dbe2/questionnaire.html#questionnaire-model
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Questions?
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