[
  {
    "url": "https://docs.python.org/3/glossary.html#term-hashable",
    "description": "Term: hashable"
  },
  {
    "url": "https://docs.python.org/3/library/stdtypes.html#mapping-types-dict",
    "description": "Mapping object: dict"
  },
  {
    "url": "https://docs.python.org/3/tutorial/datastructures.html#dictionaries",
    "description": "Docs: dicts"
  },
  {
    "url": "https://www.w3schools.com/python/python_dictionaries.asp",
    "description": "how to use dicts"
  },
  {
    "url": "https://docs.python.org/3/library/collections.html",
    "description": "Docs: collections"
  },
  {
    "url": "https://docs.python.org/3/library/collections.html#collections.Counter",
    "description": "Docs: Counter"
  },
  {
    "url": "https://docs.python.org/3/library/collections.html#collections.OrderedDict",
    "description": "Docs: ordered dicts"
  },
  {
    "url": "https://docs.python.org/2/library/collections.html#collections.defaultdict",
    "description": "Docs: default dicts"
  }
]
