Tic Tac Toe OO

# In this task you will be writing a simple game of tic-tac-toe.
# Please write docstrings for each class and method.

# ========================
# The Piece class
# ========================

# Write an abstract Piece class definition.
# Your definition should include:

class Piece(object):
pass

# =======================
# The X and O classes
# =======================

# Write definitions of X and O piece classes.
# Your definitions should include:

class X(Piece):
pass

class O(Piece):
pass

# =========================
# The TicTacToeBoard class
# =========================

# Write a TicTacToeBoard class definition.
# Your definition should include:

class TicTacToeBoard(object):
pass