import collections
 
 class dkeydict(collections.Mapping):
 	def __init__(self, items=None):
 		#: caching only
 		self.dict = {}
 
 		items = items or []
 		self.list = items.items() if hasattr(items, 'items') else items
 	def __iter__(self): return iter(self.list)
 	def __len__(self): return len(self.list)
 
 	def __getitem__(self, key):
 		result = []
 
 		#: which item to get
 		count = 0
 		counter = 0
 
 		#: how many?
 		num = 1
 
 		#: which ones to get?
 		skip = 0
 		idx = 0
 
 		if isinstance(key, tuple) and 1 < len(key) < 5:
 			if len(key) == 2:
 				key, count = key
 			elif len(key) == 3:
 				key, count, num = key
 			else:
 				key, count, num, skip = key
 
 			capturing = False
 			for k,v in reversed(self.list):
 				if k == key:
 					if len(result) == num: break
 
 					if counter >= count: capturing = True
 					counter += 1
 
 					if idx != skip:
 						capturing = False
 						idx += 1
 					else:
 						capturing = True
 						idx = 0
 
 					if capturing: result.append(v)
 
 
 
 		elif isinstance(key, slice):
 			return self.list[slice]
 		else:
 			if key in self.dict: return self.dict[key]
 			else:
 				result = reversed([v for k,v in self.list if k == key]).next()
 				self.dict[key] = result
 
 		return result