text: #!/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
  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):
          fout = open ('log','a')
          while 1:
              k = self.child.read(1, 10)
              self.term.process (k)
              fout.write ('(r,c):(%d,%d)\n' %(self.term.cur_r, self.term.cur_c))
              fout.flush()
              if self.term.cur_r == r and self.term.cur_c == c:
                  fout.close()
                  return 1
              sys.stdout.write (k)
              sys.stdout.flush()
  
      def do_scan (self):
          fout = open ('log','a')
          while 1:
              c = self.child.read(1,10)
              self.term.process (c)
              fout.write ('(r,c):(%d,%d)\n' %(self.term.cur_r, self.term.cur_c))
              fout.flush()
              sys.stdout.write (c)
              sys.stdout.flush()
  
      def do_move (self, move):
          self.read_until_cursor (19,60)
          self.child.sendline (move)
          return move
  
      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.do_move('b2b4')
  white.read_until_cursor (19,60)
  c1 = white.term.get_abs(17,58)
  c2 = white.term.get_abs(17,59)
  c3 = white.term.get_abs(17,60)
  c4 = white.term.get_abs(17,61)
  fout = open ('log','a')
  fout.write ('Computer:%s%s%s%s\n' %(c1,c2,c3,c4))
  fout.close()
  white.do_move('c2c4')
  white.read_until_cursor (19,60)
  c1 = white.term.get_abs(17,58)
  c2 = white.term.get_abs(17,59)
  c3 = white.term.get_abs(17,60)
  c4 = white.term.get_abs(17,61)
  fout = open ('log','a')
  fout.write ('Computer:%s%s%s%s\n' %(c1,c2,c3,c4))
  fout.close()
  white.do_scan ()
  
  #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()
  