caching.py
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caching.py
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	import functools
	from flask import g


	def cache_for_request():
	"""Decorator; caches the return value for the duration of the current request.

	The caller determines the cache key: args are used as cache key, *kwargs
	are not.
	"""

	def decorator(func):
	@functools.wraps(func)
	def wrapper(args, *kwargs):
	if not hasattr(g, 'request_level_cache'):
	g.request_level_cache = {}

	try:
	return g.request_level_cache[args]
	except KeyError:
	val = func(args, *kwargs)
	g.request_level_cache[args] = val
	return val
	return wrapper
	return decorator