#?eightpuzzle.py
#?--------------
#?Licensing?Information:?Please?do?not?distribute?or?publish?solutions?to?this
#?project.?You?are?free?to?use?and?extend?these?projects?for?educational
#?purposes.?The?Pacman?AI?projects?were?developed?at?UC?Berkeley?primarily?by
#?John?DeNero?（denero@cs.berkeley.edu）?and?Dan?Klein?（klein@cs.berkeley.edu）.
#?For?more?info?see?http://inst.eecs.berkeley.edu/~cs188/sp09/pacman.html

import?search
import?random

#?Module?Classes

class?EightPuzzleState:
?“““
?The?Eight?Puzzle?is?described?in?the?course?textbook?on
?page?64.

?This?class?defines?the?mechanics?of?the?puzzle?itself.??The
?task?of?recasting?this?puzzle?as?a?search?problem?is?left?to
?the?EightPuzzleSearchProblem?class.
?“““

?def?__init__（?self?numbers?）:
???“““
?????Constructs?a?new?eight?puzzle?from?an?ordering?of?numbers.

???numbers:?a?list?of?integers?from?0?to?8?representing?an
?????instance?of?the?eight?puzzle.??0?represents?the?blank
?????space.??Thus?the?list

???????[1?0?2?3?4?5?6?7?8]

?????represents?the?eight?puzzle:
???????-------------
???????|?1?|???|?2?|
???????-------------
???????|?3?|?4?|?5?|
???????-------------
???????|?6?|?7?|?8?|
???????------------

???The?configuration?of?the?puzzle?is?stored?in?a?2-dimensional
???list?（a?list?of?lists）?‘cells‘.
???“““
???self.cells?=?[]
???numbers?=?numbers[:]?#?Make?a?copy?so?as?not?to?cause?side-effects.
???numbers.reverse（）
???for?row?in?range（?3?）:
?????self.cells.append（?[]?）
?????for?col?in?range（?3?）:
???????self.cells[row].append（?numbers.pop（）?）
???????if?self.cells[row][col]?==?0:
?????????self.blankLocation?=?row?col

?def?isGoal（?self?）:
???“““
?????Checks?to?see?if?the?puzzle?is?in?its?goal?state.

???????-------------
???????|???|?1?|?2?|
???????-------------
???????|?3?|?4?|?5?|
???????-------------
???????|?6?|?7?|?8?|
???????-------------

???>>>?EightPuzzleState（[0?1?2?3?4?5?6?7?8]）.isGoal（）
???True

???>>>?EightPuzzleState（[1?0?2?3?4?5?6?7?8]）.isGoal（）
???False
???“““
???current?=?0
???for?row?in?range（?3?）:
????for?col?in?range（?3?）:
??????if?current?!=?self.cells[row][col]:
????????return?False
??????current?+=?1
???return?True

?def?legalMoves（?self?）:
???“““
?????Returns?a?list?of?legal?moves?from?the?current?state.

???Moves?consist?of?moving?the?blank?space?up?down?left?or?right.
???These?are?encoded?as?‘up‘?‘down‘?‘left‘?and?‘right‘?respectively.

???>>>?EightPuzzleState（[0?1?2?3?4?5?6?7?8]）.legalMoves（）
???[‘down‘?‘right‘]
???“““
???moves?=?[]
???row?col?=?self.blankLocation
???if（row?!=?0）:
?????moves.append（‘up‘）
???if（row?!=?2）:
?????moves.append（‘down‘）
???if（col?!=?0）:
?????moves.append（‘left‘）
???if（col?!=?2）:
?????moves.append（‘right‘）
???return?moves

?def?result（self?move）:
???“““
?????Returns?a?new?eightPuzzle?with?the?current?state?and?blankLocation
???updated?based?on?the?provided?move.

???The?move?should?be?a?string?drawn?from?a?list?returned?by?legalMoves.
???Illegal?moves?will?raise?an?exception?which?may?be

?屬性????????????大小?????日期????時間???名稱
-----------?---------??----------?-----??----
?????目錄???????????0??2014-11-24?21:20??search\
?????文件????????1214??2014-03-05?15:35??search\commands.txt
?????目錄???????????0??2014-11-24?20:55??search\docs\
?????文件???????31014??2014-03-05?15:35??search\docs\eightpuzzle.html
?????文件??????110267??2014-03-05?15:35??search\docs\game.html
?????文件???????11958??2014-03-05?15:35??search\docs\ghostAgents.html
?????文件??????150527??2014-03-05?15:35??search\docs\graphicsDisplay.html
?????文件???????62329??2014-03-05?15:35??search\docs\graphicsUtils.html
?????文件???????13892??2014-03-05?15:35??search\docs\keyboardAgents.html
?????文件???????30401??2014-03-05?15:35??search\docs\layout.html
?????文件??????102444??2014-03-05?15:35??search\docs\pacman.html
?????文件????????8298??2014-03-05?15:35??search\docs\pacmanAgents.html
?????文件????????7632??2014-03-05?15:35??search\docs\search.html
?????文件???????67061??2014-03-05?15:35??search\docs\searchAgents.html
?????文件????????9273??2014-03-05?15:35??search\docs\textDisplay.html
?????文件???????54796??2014-03-05?15:35??search\docs\util.html
?????文件????????7551??2014-03-05?15:35??search\eightpuzzle.py
?????文件???????21413??2014-03-05?15:35??search\game.py
?????文件????????2702??2014-03-05?15:35??search\ghostAgents.py
?????文件???????24877??2014-03-05?15:35??search\graphicsDisplay.py
?????文件???????11388??2014-03-05?15:35??search\graphicsUtils.py
?????文件???????19981??2014-11-24?21:18??search\instructions_search.html
?????文件????????2664??2014-03-05?15:35??search\keyboardAgents.py
?????文件????????5060??2014-03-05?15:35??search\layout.py
?????目錄???????????0??2014-11-24?20:55??search\layouts\
?????文件????????1405??2014-03-05?15:35??search\layouts\bigCorners.lay
?????文件????????1405??2014-03-05?15:35??search\layouts\bigMaze.lay
?????文件?????????256??2014-03-05?15:35??search\layouts\bigSafeSearch.lay
?????文件?????????480??2014-03-05?15:35??search\layouts\bigSearch.lay
?????文件?????????210??2014-03-05?15:35??search\layouts\boxSearch.lay
?????文件?????????141??2014-03-05?15:35??search\layouts\capsuleClassic.lay
............此處省略39個文件信息