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April 16, 2015 19:52
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very light chess game encoder for arts of memory lover -- based on https://pypi.python.org/pypi/pgnparser/1.0
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# -*- coding:utf-8 -*- | |
# Copyright (c) 2011 Renato de Pontes Pereira, renato.ppontes at gmail dot com | |
# | |
# Permission is hereby granted, free of charge, to any person obtaining a copy | |
# of this software and associated documentation files (the "Software"), to deal | |
# in the Software without restriction, including without limitation the rights | |
# to use, copy, modify, merge, publish, distribute, sublicense, and/or sell | |
# copies of the Software, and to permit persons to whom the Software is | |
# furnished to do so, subject to the following conditions: | |
# | |
# The above copyright notice and this permission notice shall be included in all | |
# copies or substantial portions of the Software. | |
# | |
# THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR | |
# IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, | |
# FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE | |
# AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER | |
# LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, | |
# OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE | |
# SOFTWARE. | |
import re | |
firstPart=["a","b","c","d"] | |
secondPart=["e","f","g","h"] | |
''' | |
A simple PGN parser. | |
PGN (Portable Game Notation) is computer-processible format for recording chess | |
games, both the moves and related data. | |
This module is based on features of others parser modules (such json and yaml). | |
The basic usage:: | |
import pgn | |
pgn_text = open('morphy.pgn).read() | |
pgn_game = pgn.PGNGame() | |
print pgn.loads(pgn_text) # Returns a list of PGNGame | |
print pgn.dumps(pgn_game) # Returns a string with a pgn game | |
''' | |
class PGNGame(object): | |
''' | |
Describes a single chess game in PGN format. | |
''' | |
TAG_ORDER = ['Event', 'Site', 'Date', 'Round', 'White', 'Black', 'Result', | |
'Annotator', 'PlyCount', 'TimeControl', 'Time', 'Termination', | |
'Mode', 'FEN'] | |
def __init__(self, event=None, site=None, date=None, round=None, | |
white=None, | |
black=None, | |
result=None): | |
''' | |
Initializes the PGNGame, receiving the requireds tags. | |
''' | |
self.event = event | |
self.site = site | |
self.date = date | |
self.round = round | |
self.white = white | |
self.black = black | |
self.result = result | |
self.annotator = None | |
self.plycount = None | |
self.timecontrol = None | |
self.time = None | |
self.termination = None | |
self.mode = None | |
self.fen = None | |
self.moves = [] | |
def dumps(self): | |
return dumps(self) | |
def __repr__(self): | |
return '<PGNGame "%s" vs "%s">' % (self.white, self.black) | |
def _pre_process_text(text): | |
''' | |
This function is responsible for removal of end line commentarys | |
(;commentary), blank lines and aditional spaces. Also, it converts | |
``\\r\\n`` to ``\\n``. | |
''' | |
text = re.sub(r'\s*(\\r)?\\n\s*', '\n', text.strip()) | |
lines = [] | |
for line in text.split('\n'): | |
line = re.sub(r'(\s*;.*|^\s*)', '', line) | |
if line: | |
lines.append(line) | |
return lines | |
def _next_token(lines): | |
''' | |
Get the next token from lines (list of text pgn file lines). | |
There is 2 kind of tokens: tags and moves. Tags tokens starts with ``[`` | |
char, e.g. ``[TagName "Tag Value"]``. Moves tags follows the example: | |
``1. e4 e5 2. d4``. | |
''' | |
if not lines: | |
return None | |
token = lines.pop(0).strip() | |
if token.startswith('['): | |
return token | |
while lines and not lines[0].startswith('['): | |
token += ' '+lines.pop(0).strip() | |
return token.strip() | |
def _parse_tag(token): | |
''' | |
Parse a tag token and returns a tuple with (tagName, tagValue). | |
''' | |
tag, value = re.match(r'\[(\w*)\s*(.+)', token).groups() | |
return tag.lower(), value.strip('"[] ') | |
def _parse_moves(token): | |
''' | |
Parse a moves token and returns a list with moviments | |
''' | |
moves = [] | |
while token: | |
token = re.sub(r'^\s*(\d+\.+\s*)?', '', token) | |
if token.startswith('{'): | |
pos = token.find('}')+1 | |
else: | |
pos1 = token.find(' ') | |
pos2 = token.find('{') | |
if pos1 <= 0: | |
pos = pos2 | |
elif pos2 <= 0: | |
pos = pos1 | |
else: | |
pos = min([pos1, pos2]) | |
if pos > 0: | |
moves.append(token[:pos]) | |
token = token[pos:] | |
else: | |
moves.append(token) | |
token = '' | |
return moves | |
def loads(text): | |
''' | |
Converts a string ``text`` into a list of PNGGames | |
''' | |
games = [] | |
game = None | |
lines = _pre_process_text(text) | |
while True: | |
token = _next_token(lines) | |
if not token: | |
break | |
if token.startswith('['): | |
tag, value = _parse_tag(token) | |
if not game or (game and game.moves): | |
game = PGNGame() | |
games.append(game) | |
setattr(game, tag, value) | |
else: | |
game.moves = _parse_moves(token) | |
return games | |
def dumps(games): | |
''' | |
Serialize a list os PGNGames (or a single game) into text format. | |
''' | |
all_dumps = [] | |
if not isinstance(games, (list, tuple)): | |
games = [games] | |
for game in games: | |
dump = '' | |
for i, tag in enumerate(PGNGame.TAG_ORDER): | |
if getattr(game, tag.lower()): | |
dump += '[%s "%s"]\n' % (tag, getattr(game, tag.lower())) | |
elif i <= 6: | |
dump += '[%s "?"]\n' % tag | |
dump += '\n' | |
i = 0 | |
for move in game.moves: | |
if not move.startswith('{'): | |
if i%2 == 0: | |
dump += str(i/2+1)+'. ' | |
i += 1 | |
dump += move + ' ' | |
all_dumps.append(dump.strip()) | |
return '\n\n\n'.join(all_dumps) | |
def isAtoEpart(move): | |
for letter in reversed(move): | |
if(letter in firstPart): | |
return True | |
if(letter in secondPart): | |
return False | |
def translate(move): | |
if move.startswith("N"): | |
if(isAtoEpart(move)): | |
return "4" | |
else: | |
return "5" | |
elif move.startswith("B"): | |
if(isAtoEpart(move)): | |
return "6" | |
else: | |
return "7" | |
elif move.startswith("K") or move.startswith("O"): | |
return "0" | |
elif move.startswith("R"): | |
return "1" | |
elif move.startswith("Q"): | |
if(isAtoEpart(move)): | |
return "8" | |
else: | |
return "9" | |
elif move[0] in firstPart: | |
return "2" | |
elif move[0] in secondPart: | |
return "3" | |
if __name__=="__main__": | |
p=PGNGame() | |
encodedGame="" | |
with open("kasparov_pribyl_1980.pgn","r") as f: | |
t=f.readlines() | |
games=loads("".join(t)) | |
for game in games: | |
for move in game.moves: | |
t=translate(move) | |
if t!=None: | |
print(move+" translated as "+t) | |
encodedGame+=t | |
else: | |
print(move) | |
s = " ".join(encodedGame[i:i+2] for i in range(0, len(encodedGame), 2)) | |
print(s) | |
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