Handy Python datatypes

gistfile1.py

class Board(list):
  '''Interprets board[1,2] as board[1][2]'''
  def __getitem__(self, key):
    try:
      cur = self
      key = list(key)
      while len(key) > 0:
        cur = list.__getitem__(cur, key.pop(0))
      return cur

    except TypeError:
      return list.__getitem__(self, key)

  def __setitem__(self, key, val):
    try:
      self.__getitem__(key[:-1])[key[-1]] = val
    except TypeError:
      list.__setitem__(self, key, val)


class Vec(tuple):
  '''Allows for vector addition, e.g. (1,2) + (3,4) = (4,6)'''
  def __add__(self, other):
    if len(self) != len(other):
      raise ValueError("Cannot add vectors with different numbers of dimensions")
    return Vec(i+j for i,j in zip(self, other))