Passion for Python

 The "collections" module provides specialized container datatypes providing alternatives to Python's gneeral purpose built-in containers, dict, list, set and tuple.  An usage example :  def groupAnagrams (strs): res = collections.defaultdict( list ) for each in strs: res[ tuple ( sorted (each))].append(each) return res.values() strs = [ "eat" , "tea" , "tan" , "ate" , "nat" , "bat" ] import collections #print(collections.defaultdict(list)) res = groupAnagrams(strs) print (res) Extract from : $python_environment/Lib/collections/__init__.py * namedtuple factory function for creating tuple subclasses with named fields * deque list-like container with fast appends and pops on either end * ChainMap dict-like class for creating a single view of multiple mappings * Counter dict subclass for counting hashable objects * OrderedDict dict subclass that remembers the order entries were...