[CentralOH] 2016-04-20 Aladdin's Napkin Scribbles: regex python3 v python2 goto harmful case harmful terraform kilt k1lt dandelions HFCS good cap city

[jep200404 at columbus.rr.com]

Need a good problem to solve with Python
for which regex is optimal[1] solution.
Then someone who eschews regexes
can show us an easier to read solution in Python (without regexes).

Eight folks showed up.

Python3 versus Python2

    not enough packages have been ported from 2 to 3,
    to do real projects

    However, in past year, enough packages _have_ been ported to Python3,
    that Python3 is feasible for most non-trivial projects.

Go To Statement Considered Harmful by Edsger W. Dijkstra
http://www.cs.utexas.edu/users/EWD/ewd13xx/EWD1308.PDF

Regexes considered harmful
    too hard to read

I often find problems for which regexes are the best solution,
in spite of them being hard to read.

Great teaching technique
a dad would bring something home and set it in front of kid.
When asked by kid about it, the dad would say that you'll figure it out.

Someone
stopped using regexes when started using Python instead of Perl.

    Regexes are OK on command line to search for something,
    but not if that regex is then handed to someone else.

Someone said:
"My goal is for the next person who reads my code to not hate me."

case statement considered harmful

    Case statement just not needed in Python.
    Use a dictionary of functions instead.

    Post a solution that uses case statement.
    Watch someone else rework that in Python.

geek
devops geek
python devops geek

compare

    some cloud* thing (cloudforms???)

    Terraform by Hashicorp
        some vendor independence

compare
    kilt
    k1lt

compare
    dreidel
    dirndl

dreidel
    cohpy at lunch:~$ python3
    Python 3.4.3 (default, Oct 14 2015, 20:33:09)
    [GCC 4.8.4] on linux
    Type "help", "copyright", "credits" or "license" for more information.
    >>> import random
    >>> random.randint(1, 4)
    4
    >>> random.randint(1, 4)
    4
    >>> random.randint(1, 4)
    2
    >>>
    cohpy at lunch:~$
Someone
thought that dirndl is a made-up word.

One of us rode a motorcycle.
There was a beemer in the parking lot.
Of course you know that this leads to a
discussion of adjusting valves in the morning and ZMM.

dandelions are early food for honey bees
wp:Anaphylaxis
wp:Epinephrine autoinjector
Amazing calming effect of smoke on bees
    smoke from just about anything works
bees attack dark things
beekeeping suits are white
spillage of HFCS from rail tankcar fed to bees

wp: prefix means Wikipedia
To get good answers, consider following the advice in the links below.
http://catb.org/~esr/faqs/smart-questions.html
http://web.archive.org/web/20090627155454/www.greenend.org.uk/rjk/2000/06/14/quoting.html

security mba: first monday? 6pm?
python mba: first tuesday?
lebanon night????: first monday evening at Mazah???? (research before going)

Jasmine's Lebanese salad was excellent

Cap City Diner on ORR

Pour cold water on skin on which hot coffee has been spilled.

[1] Of course, everyone will have their own idea of what optimal is.
    Interpret that word as you wish.