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Date: Fri, 02 Mar 2012 22:57:12 +0100
From: Karim <kliateni@gmail.com>
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To: python-list@python.org
Subject: Re: decompilation
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Le 02/03/2012 21:18, Arnaud Delobelle a écrit :
> On 2 March 2012 18:52, shikha panghal<spdollyshikha4@gmail.com>  wrote:
>> Hi
>>
>> Please decoplile the .pyc code ,as i have lost my .py code.
> Aha, a customer!  I've written a module for this: unpyc3
> (http://code.google.com/p/unpyc3/)
>
> Here it is in action:
>
>
> Python 3.2.1 (v3.2.1:ac1f7e5c0510, Jul  9 2011, 01:03:53)
> [GCC 4.2.1 (Apple Inc. build 5666) (dot 3)] on darwin
> Type "help", "copyright", "credits" or "license" for more information.
>>>> import unpyc3
>>>> import hangman322
>>>> code = unpyc3.decompile(hangman322)
>>>> print(code)
> import random
>
> def readFile(fileName):
>      file = open(fileName)
>      lineList = file.readlines()
>      file.close()
>      return lineList
>
> def initialize(fileName):
>      try:
>          lineList = readFile(fileName)
>      except:
>          print('Oops! ' + filename + ' was not a valid file.')
>          return
>      len_d = len(lineList)
>      word_length = [0]*len_d
>      for i in range(len_d):
>          if lineList[i][-1] == '\n':
>              word_length[i] = len(lineList[i]) - 1
>          else:
>              word_length[i] = len(lineList[i])
>      tabulate = [0]*25
>      for i in range(len_d):
>          if word_length[i]>= 24:
>              tabulate[24] = tabulate[24] + 1
>          else:
>              tabulate[word_length[i]] = tabulate[word_length[i]] + 1
>      words = [None]*25
>      for i in range(2, 24):
>          words[i] = [None]*tabulate[i]
>          k = 0
>          for j in range(len_d):
>              if word_length[j] == i:
>                  words[i][k] = lineList[j]
>                  k = k + 1
>      for i in range(24, 25):
>          words[i] = [None]*tabulate[i]
>          k = 0
>          for j in range(len_d):
>              if word_length[j]>= i:
>                  words[i][k] = lineList[j]
>                  k = k + 1
>      return words
>
> def wordsOfLength(n, source_file):
>      words = initialize(source_file)
>      return words[n]
>
> def getUserStringInput(L, prompt):
>      replyInList = False
>      while not replyInList:
>          reply = input(prompt)
>          replyInList = reply in L
>          if not replyInList:
>              print('That reply is invalid. Try again.')
>      return reply
>
> def intListToStringList(L):
>      L2 = ['']*len(L)
>      for i in range(len(L)):
>          L2[i] = str(L[i])
>      return L2
>
> def getNewLetterGuess(availableLetters):
>      letterString = ''
>      for j in range(26):
>          if availableLetters[j]:
>              letterString = letterString + chr(65 + j) + ' '
>          else:
>              letterString = letterString + '  '
>      validChar = False
>      print(letterString)
>      while not validChar:
>          reply = input('Guess!>  ')
>          if len(reply) == 1:
>              validChar = True
>      letterIndex = ord(reply) - 65
>      if letterIndex>  25:
>          letterIndex = letterIndex - 32
>      while letterIndex>  25 or not availableLetters[letterIndex]:
>          print('This is an invalid choice. Please try again!')
>          validChar = False
>          print(letterString)
>          while not validChar:
>              reply = input('Guess!>  ')
>              if len(reply) == 1:
>                  validChar = True
>          letterIndex = ord(reply) - 65
>          if letterIndex>  25:
>              letterIndex = letterIndex - 32
>      guess = chr(97 + letterIndex)
>      availableLetters[letterIndex] = False
>      return guess, availableLetters
>
> def getWordFamilyCounter(L, n, guess):
>      wordFamilyCounter = [0]*2**n
>      familyIndexList = [-1]*len(L)
>      for k in range(len(L)):
>          w = list(L[k])
>          ct = 0
>          for k2 in range(n):
>              if w[k2] == guess:
>                  ct = ct + 2**k2
>          familyIndexList[k] = ct
>          wordFamilyCounter[ct] = wordFamilyCounter[ct] + 1
>      return wordFamilyCounter, familyIndexList
>
> def extractLargestFamily(L, familyIndexList, wordFamilyCounter):
>      bestFamily = wordFamilyCounter.index(max(wordFamilyCounter))
>      boolist = [False]*len(L)
>      for k3 in range(len(L)):
>          if familyIndexList[k3] == bestFamily:
>              boolist[k3] = True
>      j2 = 0
>      smallList = [' ']*sum(boolist)
>      for k4 in range(len(L)):
>          if boolist[k4]:
>              smallList[j2] = L[k4]
>              j2 = j2 + 1
>      return smallList
>
> def updatePatternList(patternList, guess, bestFamily):
>      n = len(patternList)
>      for k6 in range(n):
>          if bestFamily//2 == bestFamily/2:
>              pass
>          else:
>              patternList[k6] = guess + ' '
>          bestFamily = bestFamily>>  1
>      return patternList
>
> def pickWordFrom(L):
>      index = random.randint(0, len(L) - 1)
>      return L[index]
>
> def play():
>      reply = getUserStringInput(intListToStringList(list(range(2,
> 21))), 'How long should I make your word?!!? (2 to 20)>  ')
>      n = int(reply)
>      patternList = ['_ ']*n
>      print(''.join(patternList))
>      L = wordsOfLength(n, 'dictionary.txt')
>      reply = getUserStringInput(intListToStringList(list(range(1,
> 27))), 'How many guesses will you need?>  ')
>      m = int(reply)
>      availableLetters = [True]*26
>      for i in range(m):
>          guess, availableLetters = getNewLetterGuess(availableLetters)
>          wordFamilyCounter, familyIndexList = getWordFamilyCounter(L, n, guess)
>          bestFamily = wordFamilyCounter.index(max(wordFamilyCounter))
>          if bestFamily == 0:
>              print('Letter not in word.')
>          else:
>              print('Letter is in word!!!')
>          L = extractLargestFamily(L, familyIndexList, wordFamilyCounter)
>          patternList = updatePatternList(patternList, guess, bestFamily)
>          print(''.join(patternList))
>          if '_ ' not in patternList:
>              break
>      if '_ ' not in patternList:
>          print('SURELY you must be CHEATING, but you guessed my word in
> ' + str(i + 1) + ' tries!!!')
>      else:
>          bogusWord = pickWordFrom(L)
>          print('You lose.  The word was: ' + bogusWord)
>
> I haven't actually checked if this code runs :)
>


Great code (unpy3) Arnaud!
pretty well built.

Cheers
Karim