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Editing: chess.py
#!/usr/bin/env python '''This demonstrates controlling a screen oriented application (curses). It starts two instances of gnuchess and then pits them against each other. PEXPECT LICENSE This license is approved by the OSI and FSF as GPL-compatible. http://opensource.org/licenses/isc-license.txt Copyright (c) 2012, Noah Spurrier <noah@noah.org> PERMISSION TO USE, COPY, MODIFY, AND/OR DISTRIBUTE THIS SOFTWARE FOR ANY PURPOSE WITH OR WITHOUT FEE IS HEREBY GRANTED, PROVIDED THAT THE ABOVE COPYRIGHT NOTICE AND THIS PERMISSION NOTICE APPEAR IN ALL COPIES. THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE. ''' from __future__ import print_function from __future__ import absolute_import import pexpect from pexpect import ANSI REGEX_MOVE = r'(?:[a-z]|\x1b\[C)(?:[0-9]|\x1b\[C)(?:[a-z]|\x1b\[C)(?:[0-9]|\x1b\[C)' REGEX_MOVE_PART = r'(?:[0-9]|\x1b\[C)(?:[a-z]|\x1b\[C)(?:[0-9]|\x1b\[C)' class Chess: def __init__(self, engine = "/usr/local/bin/gnuchess -a -h 1"): self.child = pexpect.spawn (engine) self.term = ANSI.ANSI () self.child.expect ('Chess') if self.child.after != 'Chess': raise IOError('incompatible chess program') self.term.process_list (self.before) self.term.process_list (self.after) self.last_computer_move = '' def read_until_cursor (self, r,c): while 1: self.child.read(1, 60) self.term.process (c) if self.term.cur_r == r and self.term.cur_c == c: return 1 def do_first_move (self, move): self.child.expect ('Your move is') self.child.sendline (move) self.term.process_list (self.before) self.term.process_list (self.after) return move def do_move (self, move): self.read_until_cursor (19,60) self.child.sendline (move) return move def get_first_computer_move (self): self.child.expect ('My move is') self.child.expect (REGEX_MOVE) return self.child.after def get_computer_move (self): print('Here') i = self.child.expect ([r'\[17;59H', r'\[17;58H']) print(i) if i == 0: self.child.expect (REGEX_MOVE) if len(self.child.after) < 4: self.child.after = self.child.after + self.last_computer_move[3] if i == 1: self.child.expect (REGEX_MOVE_PART) self.child.after = self.last_computer_move[0] + self.child.after print('', self.child.after) self.last_computer_move = self.child.after return self.child.after def switch (self): self.child.sendline ('switch') def set_depth (self, depth): self.child.sendline ('depth') self.child.expect ('depth=') self.child.sendline ('%d' % depth) def quit(self): self.child.sendline ('quit') import sys print('Starting...') white = Chess() white.child.echo = 1 white.child.expect ('Your move is') white.set_depth(2) white.switch() move_white = white.get_first_computer_move() print('first move white:', move_white) white.do_move ('e7e5') move_white = white.get_computer_move() print('move white:', move_white) white.do_move ('f8c5') move_white = white.get_computer_move() print('move white:', move_white) white.do_move ('b8a6') move_white = white.get_computer_move() print('move white:', move_white) sys.exit(1) black = Chess() white = Chess() white.child.expect ('Your move is') white.switch() move_white = white.get_first_computer_move() print('first move white:', move_white) black.do_first_move (move_white) move_black = black.get_first_computer_move() print('first move black:', move_black) white.do_move (move_black) done = 0 while not done: move_white = white.get_computer_move() print('move white:', move_white) black.do_move (move_white) move_black = black.get_computer_move() print('move black:', move_black) white.do_move (move_black) print('tail of loop') g.quit()
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