Popular recipes by Scott S-Allen

Dynamically create a dictionary of ascending paths (Python)

2012-12-03T22:50:47-08:00

Python recipe 578354 by Scott S-Allen (bootstrap, dictionary, directory, dynamic, flexible, path, portable).

Ripped from a more elaborate bootstrap script. A sequential set of parent-directories were required for environment variables and subsequent, portable. auto-discovery.

List comparison, difference and more using set & frozenset (Python)

2012-11-01T10:30:58-07:00

Python recipe 578310 by Scott S-Allen (compare, contain, difference, lambda, list, remove, set, union).

Python has a powerful suite of tools for comparing lists by way of sets and frozensets. Here are a few examples and conveniences that many newcomers, even a few seasoned developers, are unaware.

Monday of first week per year (not first Monday) (Python)

2012-10-31T04:37:28-07:00

Python recipe 578308 by Scott S-Allen (date, week). Revision 4.

13th week of any year is ambiguous without identifying the first week.

This recipe calculates Monday of the first week, not the first Monday, and differs from others by not using flow-control statement (if).

Cheap-date trick; a different way to parse (Python)

2012-03-06T14:08:10-08:00

Python recipe 578064 by Scott S-Allen (cheap, date, format, grep, parse, regex, sharp).

... a light meal with a heavy dose of "tutorial mash" on the side.

In the constructive spirit of "more ways to solve a problem"; this is a portion of my lateral, occasionally oblique, solutions. Nothing new in le régime de grande, but hopefully the conceptual essence will amuse.

Initially started as a response to recipe 577135 which parses incremental date fragments and preserves micro-seconds where available. That script does more work than this, for sure, but requires special flow-control and iterates a potentially incumbering shopping list (multi-dimensional with some detail).

So here's a different box for others to play with. Upside-down in a sense, it doesn't hunt for anything but a numerical "pulse"; sequences of digits punctuated by other 'stuff' we don't much care about.

Missing a lot of things, intentionally, this snippet provides several examples demoin' flexibility. Easy to button-up, redecorate and extend later for show, till then the delightful commentary makes it hard enough to see bones already -- all six lines or so!

Note: The core script is repeated for illustrative purposes. The first is step-by-step, the second is lean and condensed for utilitarian purposes. It is the second, shorter, version that I yanked from a file and gussied up.