2.0.0rc1

New Stuff

• py -m mahjong now takes a --game argument to specify playing a whole game instead of the new default, one hand only.
• mahjong.melds.FLAG_FAAN is a mapping from each WuFlag to the amount of faan it's worth.
• Wu() now takes a discarder argument before flags representing the seat of who pays the penalty for this hand being won. It is set as a Wind to Wu.discarder.
• Wu.flags takes the same arguments as Wu.faan and computes only the situational flags. Faan calculation is still done in Wu.faan.
• mahjong.melds.faan is a simple function that computes faan from flags, using FLAG_FAAN.
• Bonus-related WuFlags.
• HandEnding.faan combines Wu.faan and Player.faan since it has access to both, as well as seat and prevailing winds.
• HandEnding.points calculates the points that each player owes or receives, as well as still returning the flags.
• mahjong.game.STOCK_TABLES are some stock faan-to-points translation tables to pass to HandEnding.points. The default is STOCK_TABLES['random_app'].
• Question.SELF_DRAW_Q is now asked to confirm whether to commit to a self-draw, instead of just seizing upon it by default.
• A Hand can be instantiated on its own now:
  • with a Round subclass if the instantiator has control over such machinery.
  • with a list of Players if the instantiator has control over the machinery by means of something other than a Round subclass.
  • with None if the Hand is to be played standalone, in which case Hand.play is the entry point instead of Game.play.
• WuFlag.TWELVE_PIECE, GAVE_DRAGON, GAVE_KONG, and support for such penalties (including in HandEnding.points).

Changes

• py -m mahjong now plays only one hand by default
• WuFlag values are now hardcoded instead of auto
• Swapped WuFlag.NINE_GATES to 1 << 9 and WuFlag.THIRTEEN_ORPHANS to 1 << 13 because it just makes sense that way
• Renamed Wu.flags to Wu.base_flags
• Just use *args and **kwargs in Wu.from_str for the extra arguments
• Separated faan calculation from flags computation. This has little effect on Wu.faan; the most significant is that mutually exclusive flags are now actually mutually excluded, rather than just the faan being reduced to compensate.
• Things that were nominally ints but semantically Winds are now all Winds, except in some cases when passing them as arguments (in which case the Wind constructor is applied).
• Player.bonus_faan now returns both faan and flags of its own
• HandEnding.gen: Generator is now HandEnding.hand: Hand
• Hand.round is now Optional
• Hand.gen and Hand.players are now set, to support playing a standalone hand
• Stealing a tile from the previous player's discard is now confirmed by Question.MELD_FROM_DISCARD_Q for winning hands in addition to other melds
• Removed internal Answerable ABC

Fixes

• Wu.base_flags (formerly Wu.flags) is now properly annotated
• Thirteen Orphans are only valid if the extra tile is a duplicate of any of the other tiles, not when it's literally any tile. A set of valid Thirteen Orphans tiles will therefore equal a set of all Thirteen Orphans tiles.
• _UncheckedWu.fixed_melds was missing and caused an AttributeError when actually encountering Thirteen Orphans
• Tile.from_str failed to typecheck because of suit
• Game.play might return a HandEnding on first go, though all wins should be confirmed first by now.