Learn AlphaGo & Python (03)

Landing a piece on board

Add a dictionary _grid in dlgo/goboard_slow.py:

class Board():
  def __init__(self, num_rows, num_cols):
    self.num_rows = num_rows
    self.num_cols = num_cols
    self._grid = {}

Rename print_board.py to game.py.

🐍 mv print_board.py game.py

game.py:

from dlgo.goboard_slow import Board
from collections import namedtuple
import timeclass Point(namedtuple('Point', 'row col')):
  passCOLS = 'ABCDEFGHJKLMNOPQRST'def print_board(board):
  for row in range(board.num_rows, 0, -1):
    bump = " " if row <= 9 else ""
    line = []
    for col in range(1, board.num_cols + 1):
      p = Point(row=row, col=col)
      if p in board._grid:
        if board._grid[p] == 'x':
          line.append("x ")
        elif board._grid[p] == 'o':
          line.append("o ")
      else:
        line.append(". ")
    print('%s%d %s' % (bump, row, ''.join(line)))
  print('   ' + ' '.join(COLS[:board.num_cols]))def main():
  board = Board(19, 19)
  point23 = Point(row=2, col=3)
  board._grid[point23] = 'x'
  while True:
    time.sleep(0.3)    print(chr(27) + "[2J") 
    print_board(board)
    print()if __name__ == '__main__':
  main()

Run game.py

🐍 python3 game.py

“Ctrl + C” to stop it.

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   A B C D E F G H J K L M N O P Q R S T

Move out Point to a new file dlgo/gotypes.py.

🐍 vim dlgo/gotypes.py

dlgo/gotypes.py:

from collections import namedtuple
  
class Point(namedtuple('Point', 'row col')):
  pass

game.py:

from dlgo.goboard_slow import Board
from dlgo.gotypes import Point
import timeCOLS = 'ABCDEFGHJKLMNOPQRST'def print_board(board):
  for row in range(board.num_rows, 0, -1):
    bump = " " if row <= 9 else ""
    line = []
    for col in range(1, board.num_cols + 1):
      p = Point(row=row, col=col)
      if p in board._grid:
        if board._grid[p] == 'x':
          line.append("x ")
        elif board._grid[p] == 'o':
          line.append("o ")
      else:
        line.append(". ")
    print('%s%d %s' % (bump, row, ''.join(line)))
  print('   ' + ' '.join(COLS[:board.num_cols]))def main():
  board = Board(19, 19)
  point23 = Point(row=2, col=3)
  board._grid[point23] = 'x'
  while True:
    time.sleep(0.3)
    
    print(chr(27) + "[2J")
    print_board(board)
    print()if __name__ == '__main__':
  main()

Create function place_stone(..) and get(..) in class Board:

🐍 vim dlgo/goboard_slow.py

dlgo/goboard_slow.py:

class Board():
  def __init__(self, num_rows, num_cols):
    self.num_rows = num_rows
    self.num_cols = num_cols
    self._grid = {}def place_stone(self, point, piece):
    self._grid[point] = piecedef get(self, point):
    return self._grid.get(point)

game.py

from dlgo.goboard_slow import Board
from dlgo.gotypes import Point
import timeCOLS = 'ABCDEFGHJKLMNOPQRST'def print_board(board):
  for row in range(board.num_rows, 0, -1):
    bump = " " if row <= 9 else ""
    line = []
    for col in range(1, board.num_cols + 1):
      p = Point(row=row, col=col)
      if p in board._grid:
        if board.get(p) == 'x':
          line.append("x ")
        elif board.get(p) == 'o':
          line.append("o ")
      else:
        line.append(". ")
    print('%s%d %s' % (bump, row, ''.join(line)))
  print('   ' + ' '.join(COLS[:board.num_cols]))def main():
  board = Board(19, 19)
  point23 = Point(row=2, col=3)
  board.place_stone(point23, 'x')
  while True:
    time.sleep(0.3)
    
    print(chr(27) + "[2J")
    print_board(board)
    print()if __name__ == '__main__':
  main()

Create enum Player in dlgo/gotypes.py:

import enum
from collections import namedtupleclass Player(enum.Enum):
  black = 1
  white = 2
  
class Point(namedtuple('Point', 'row col')):
  pass

Modify function place_stone(..) in dlgo/goboard_slow.py:

class Board():
  def __init__(self, num_rows, num_cols):
    self.num_rows = num_rows
    self.num_cols = num_cols
    self._grid = {}def place_stone(self, player, point):
    self._grid[point] = playerdef get(self, point):
    return self._grid.get(point)

Add another white piece on board. Run it and press Ctrl + C to stop it.

🐍 vim game.py
🐍 python3 game.py19 . . . . . . . . . . . . . . . . . . . 
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   A B C D E F G H J K L M N O P Q R S T^CTraceback (most recent call last):
  File "game.py", line 34, in <module>
    main()
  File "game.py", line 27, in main
    time.sleep(0.3)
KeyboardInterrupt
🐍

game.py:

from dlgo.goboard_slow import Board 
from dlgo import gotypes
import timeCOLS = 'ABCDEFGHJKLMNOPQRST'
STONE_TO_CHAR = {
  None: '. ',
  gotypes.Player.black: 'x ',
  gotypes.Player.white: 'o ',
}def print_board(board):
  for row in range(board.num_rows, 0, -1):
    bump = " " if row <= 9 else ""
    line = []
    for col in range(1, board.num_cols + 1):
      stone = board.get(gotypes.Point(row=row, col=col))
      line.append(STONE_TO_CHAR[stone])
    print('%s%d %s' % (bump, row, ''.join(line)))
  print('   ' + ' '.join(COLS[:board.num_cols]))def main():
  board = Board(19, 19)
  board.place_stone(gotypes.Player.black, gotypes.Point(2, 3))
  board.place_stone(gotypes.Player.white, gotypes.Point(2, 4))
  while True:
    time.sleep(0.3)
    
    print(chr(27) + "[2J")
    print_board(board)
    print()if __name__ == '__main__':
  main()