chess

game
┣name: string. The name of the game.
┣chessboard: dict. Discribe the chessboard.
┃┣pic: string. The path of the pic used for the chessboard.
┃┣shape: string. "square" or "custom".
┃┣chess_pos: string. optional. For type "custom", evaluate the position of chess's pic using the chess's param_pos.
┃┃    When evaluating expression, "self" stands for the current chess. Returns a tuple contains x, y.
┃┣begin_pos_x: float. optional.
┃┣begin_pos_y: float. optional. For type "square", stands for the left-up corner of the using area.
┃┣interval_x: float. optional.
┃┗interval_y: float. optional. For type "square", stands for the interval of the chess's pic.
┣parse: string. Evaluate to parse the user input to get the command for chess logic.
┃    When evaluating expression, "i" stands for the input string, "chess_list" stands for a list of all chess.
┣chess: dict. Discribe the chess.
┃┃    Properties: "chess.param_pos": Tuple[float, ...]. Stands for the params that can determine the pos of the chess.
┃┃      "chess.type": string. Stands for the type name of the chess.
┃┃      "chess.param": Tuple[Union[int, float, string], ...]. Stands for the floating params for the chess.
┃┃    Member function: "chess.changePic(i)" can be called to change pic.
┃┃      "chess.suicide()" can be called to remove itself.
┃┃      "chess.moveTo(*param_pos)" can be called to move to the specified pos.
┃┣pics: list of string. The path of the pic list used for chess.
┃┣types: list of type of chess.
┃┃┣name: string. name of the type.
┃┃┣slots: list of member functions.
┃┃┃┣name: string. The name of member function. "chess.name(*args)" will call this function.
┃┃┃┗lambda: string. The lambda of the function. "args[n]" stands for the input args when calling this function.
┃┃┗pic_init: int. Initial pic chosen for this type.
┃┗
┗timeline: dict. Discribe the timeline of the game.
 ┣
symbols allowed in expression:
+ - * / % ** & | ^ == != < <= > >= = += -= *= /= %= &= |= ^= [ ] ( ) . , : if else for in raise
public function:
AddChess(type)
Randint(begin, end)
Rand()