chess.pgn.read_game
If you want to export your game with all headers, comments and variations, you can do it like this:
>>> import chess >>> import chess.pgn >>> >>> game = chess.pgn.Game() >>> game.headers["Event"] = "Example" >>> node = game.add_variation(chess.Move.from_uci("e2e4")) >>> node = node.add_variation(chess.Move.from_uci("e7e5")) >>> node.comment = "Comment" >>> >>> print(game) [Event "Example"] [Site "?"] [Date "????.??.??"] [Round "?"] [White "?"] [Black "?"] [Result ""] <BLANKLINE> 1. e4 e5 { Comment }
Remember that games in files should be separated with extra blank lines.
>>> print(game, file=open("/dev/null", "w"), end="nn")
Use the ~chess.pgn.StringExporter() or ~chess.pgn.FileExporter() visitors if you need more control.
Games are represented as a tree of moves. Each ~chess.pgn.GameNode can have extra information, such as comments. The root node of a game (~chess.pgn.Game extends the ~chess.pgn.GameNode) also holds general information, such as game headers.
chess.pgn.Game
chess.pgn.GameNode
Visitors are an advanced concept for game tree traversal.
chess.pgn.BaseVisitor
The following visitors are readily available.
chess.pgn.GameBuilder
chess.pgn.HeadersBuilder
chess.pgn.BoardBuilder
chess.pgn.SkipVisitor
chess.pgn.StringExporter
chess.pgn.FileExporter
Numeric anotation glyphs describe moves and positions using standardized codes that are understood by many chess programs. During PGN parsing, annotations like !, ?, !!, etc., are also converted to NAGs.
chess.pgn.NAG_GOOD_MOVE
chess.pgn.NAG_MISTAKE
chess.pgn.NAG_BRILLIANT_MOVE
chess.pgn.NAG_BLUNDER
chess.pgn.NAG_SPECULATIVE_MOVE
chess.pgn.NAG_DUBIOUS_MOVE
These functions allow for quickly skimming games without fully parsing them.
chess.pgn.read_headers
chess.pgn.skip_game