degal: degal/utils.py@fbbe956229cc (annotated)

44 533b7e8b5d3b strip copyright/license boilerplate from modules, except dexif and formatbytes Tero Marttila <terom@fixme.fi> parents: 41 diff changeset	1	"""
533b7e8b5d3b strip copyright/license boilerplate from modules, except dexif and formatbytes Tero Marttila <terom@fixme.fi> parents: 41 diff changeset	2	Miscellaneous utilities
533b7e8b5d3b strip copyright/license boilerplate from modules, except dexif and formatbytes Tero Marttila <terom@fixme.fi> parents: 41 diff changeset	3	"""
533b7e8b5d3b strip copyright/license boilerplate from modules, except dexif and formatbytes Tero Marttila <terom@fixme.fi> parents: 41 diff changeset	4
59 fbbe956229cc remove old utils and write some new ones Tero Marttila <terom@fixme.fi> parents: 44 diff changeset	5	import functools
23 10841abbc01f taggr2, which is starting to shape up terom parents: 20 diff changeset	6
59 fbbe956229cc remove old utils and write some new ones Tero Marttila <terom@fixme.fi> parents: 44 diff changeset	7	class LazyProperty (property) :
12 c2d8e9a754a1 Major code restructuring. Version is now 0.5, templates use Mako, and the code is split off into several files under lib/ terom parents: diff changeset	8	"""
59 fbbe956229cc remove old utils and write some new ones Tero Marttila <terom@fixme.fi> parents: 44 diff changeset	9	Lazy-loaded properties
12 c2d8e9a754a1 Major code restructuring. Version is now 0.5, templates use Mako, and the code is split off into several files under lib/ terom parents: diff changeset	10	"""
c2d8e9a754a1 Major code restructuring. Version is now 0.5, templates use Mako, and the code is split off into several files under lib/ terom parents: diff changeset	11
59 fbbe956229cc remove old utils and write some new ones Tero Marttila <terom@fixme.fi> parents: 44 diff changeset	12	def __init__ (self, func) :
fbbe956229cc remove old utils and write some new ones Tero Marttila <terom@fixme.fi> parents: 44 diff changeset	13	"""
fbbe956229cc remove old utils and write some new ones Tero Marttila <terom@fixme.fi> parents: 44 diff changeset	14	Initialize with no value
fbbe956229cc remove old utils and write some new ones Tero Marttila <terom@fixme.fi> parents: 44 diff changeset	15	"""
12 c2d8e9a754a1 Major code restructuring. Version is now 0.5, templates use Mako, and the code is split off into several files under lib/ terom parents: diff changeset	16
59 fbbe956229cc remove old utils and write some new ones Tero Marttila <terom@fixme.fi> parents: 44 diff changeset	17	super(LazyProperty, self).__init__(func)
19 8d3ffd87cb0b * move cgi-bin to de-cgi-bin so it doesn't conflict with my default alias... need to come up with a real solution to this terom parents: 18 diff changeset	18
59 fbbe956229cc remove old utils and write some new ones Tero Marttila <terom@fixme.fi> parents: 44 diff changeset	19	self.value = None
26 81d6679d50d0 updated shorturls.py to write new shorturls to the db, also adding support for dir-shorturls terom parents: 23 diff changeset	20
59 fbbe956229cc remove old utils and write some new ones Tero Marttila <terom@fixme.fi> parents: 44 diff changeset	21	def run (self) :
fbbe956229cc remove old utils and write some new ones Tero Marttila <terom@fixme.fi> parents: 44 diff changeset	22	"""
fbbe956229cc remove old utils and write some new ones Tero Marttila <terom@fixme.fi> parents: 44 diff changeset	23	Run the background func and return the to-be-cached value
fbbe956229cc remove old utils and write some new ones Tero Marttila <terom@fixme.fi> parents: 44 diff changeset	24	"""
28 70b6c13d084f fancy new log format terom parents: 27 diff changeset	25
59 fbbe956229cc remove old utils and write some new ones Tero Marttila <terom@fixme.fi> parents: 44 diff changeset	26	return super(LazyProperty, self).__call__()
fbbe956229cc remove old utils and write some new ones Tero Marttila <terom@fixme.fi> parents: 44 diff changeset	27
fbbe956229cc remove old utils and write some new ones Tero Marttila <terom@fixme.fi> parents: 44 diff changeset	28	def __call__ (self) :
fbbe956229cc remove old utils and write some new ones Tero Marttila <terom@fixme.fi> parents: 44 diff changeset	29	"""
fbbe956229cc remove old utils and write some new ones Tero Marttila <terom@fixme.fi> parents: 44 diff changeset	30	Return the cached value if it exists, otherwise, call the func
fbbe956229cc remove old utils and write some new ones Tero Marttila <terom@fixme.fi> parents: 44 diff changeset	31	"""
fbbe956229cc remove old utils and write some new ones Tero Marttila <terom@fixme.fi> parents: 44 diff changeset	32
fbbe956229cc remove old utils and write some new ones Tero Marttila <terom@fixme.fi> parents: 44 diff changeset	33	if not self.value :
fbbe956229cc remove old utils and write some new ones Tero Marttila <terom@fixme.fi> parents: 44 diff changeset	34	# generate it
fbbe956229cc remove old utils and write some new ones Tero Marttila <terom@fixme.fi> parents: 44 diff changeset	35	self.value = self.run()
fbbe956229cc remove old utils and write some new ones Tero Marttila <terom@fixme.fi> parents: 44 diff changeset	36
fbbe956229cc remove old utils and write some new ones Tero Marttila <terom@fixme.fi> parents: 44 diff changeset	37	return self.value
fbbe956229cc remove old utils and write some new ones Tero Marttila <terom@fixme.fi> parents: 44 diff changeset	38
fbbe956229cc remove old utils and write some new ones Tero Marttila <terom@fixme.fi> parents: 44 diff changeset	39	class LazyIteratorProperty (LazyProperty) :
fbbe956229cc remove old utils and write some new ones Tero Marttila <terom@fixme.fi> parents: 44 diff changeset	40	"""
fbbe956229cc remove old utils and write some new ones Tero Marttila <terom@fixme.fi> parents: 44 diff changeset	41	A lazy-loaded property that automatically converts an iterator/genexp into a list.
fbbe956229cc remove old utils and write some new ones Tero Marttila <terom@fixme.fi> parents: 44 diff changeset	42	"""
fbbe956229cc remove old utils and write some new ones Tero Marttila <terom@fixme.fi> parents: 44 diff changeset	43
fbbe956229cc remove old utils and write some new ones Tero Marttila <terom@fixme.fi> parents: 44 diff changeset	44	def run (self) :
fbbe956229cc remove old utils and write some new ones Tero Marttila <terom@fixme.fi> parents: 44 diff changeset	45	"""
fbbe956229cc remove old utils and write some new ones Tero Marttila <terom@fixme.fi> parents: 44 diff changeset	46	Wrap LazyProperty.run to return a list
fbbe956229cc remove old utils and write some new ones Tero Marttila <terom@fixme.fi> parents: 44 diff changeset	47	"""
fbbe956229cc remove old utils and write some new ones Tero Marttila <terom@fixme.fi> parents: 44 diff changeset	48
fbbe956229cc remove old utils and write some new ones Tero Marttila <terom@fixme.fi> parents: 44 diff changeset	49	return list(super(LazyIteratorProperty, self).run())
fbbe956229cc remove old utils and write some new ones Tero Marttila <terom@fixme.fi> parents: 44 diff changeset	50
fbbe956229cc remove old utils and write some new ones Tero Marttila <terom@fixme.fi> parents: 44 diff changeset	51	lazy_load = LazyProperty
fbbe956229cc remove old utils and write some new ones Tero Marttila <terom@fixme.fi> parents: 44 diff changeset	52	lazy_load_iter = LazyIteratorProperty
fbbe956229cc remove old utils and write some new ones Tero Marttila <terom@fixme.fi> parents: 44 diff changeset	53

author	Tero Marttila <terom@fixme.fi>
	Fri, 05 Jun 2009 19:30:53 +0300
changeset 59	fbbe956229cc
parent 44	533b7e8b5d3b
child 73	8897352630a5
permissions	-rw-r--r--