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crossword_lab_pro_51.py
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crossword_lab_pro_51.py
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## Author: Sridhar Chowdhary Created on: 13-DEC-2018
## M.Tech AI, CVR college of Engineering
## Under the guidance of Dr. R. Ponnusamy
## This program solves the crossword puzzle
## which is a constraint satisfaction problem
## additionally applying heuristic function
# Solution state:
#['C', 'A', 'T', '#']
#['O', 'N', '#', 'A']
#['A', 'D', '#', '#']
#['T', '#', 'W', 'E']
import itertools
class Crossword:
def __init__(self):
self.crossword = [['','','','#'],
['','','#',''],
['','','#','#'],
['','#','','']]
self.crosswordres = [['','','','#'],
['','','#',''],
['','','#','#'],
['','#','','']]
self.allwords = ['AND','A','WE','COAT','CAT']
self.completed_flag = False
self.word_batch=[['','',''],[''],['',''],['','','',''],['','','']]
self.word_batch_pos=[(0,0,0),(1,3,0),(3,2,0),(0,0,1),(0,1,1)]
self.cons_0_3 =[]
self.cons_0_4 =[]
self.cons_0=[]
self.cons_1=[]
self.cons_2=[]
self.cons_3=[]
self.cons_4=[]
def checkconstraints(self):
if self.word_batch[0][0]!='' and self.word_batch[3][0] != '':
self.cons_0_3 =[self.word_batch[0][0],self.word_batch[3][0]]
else:
self.cons_0_3 =['','']
if self.word_batch[0][1] != '' and self.word_batch[4][0] != '':
self.cons_0_4 =[self.word_batch[0][1],self.word_batch[4][0]]
else:
self.cons_0_4 = ['','']
self.cons_0=[len(self.word_batch[0]),3]
self.cons_1=[len(self.word_batch[1]),1]
self.cons_2=[len(self.word_batch[2]),2]
self.cons_3=[len(self.word_batch[3]),4]
self.cons_4=[len(self.word_batch[4]),3]
if (self.cons_0_3[0]==self.cons_0_3[1] and self.cons_0_4[0]==self.cons_0_4[1] \
and self.cons_0[0]==self.cons_0[1] and self.cons_1[0]==self.cons_1[1] \
and self.cons_2[0]==self.cons_2[1] and self.cons_3[0]==self.cons_3[1] and \
self.cons_4[0]==self.cons_4[1]):
return True
else:
return False
def clear(self):
for i in range(len(self.crosswordres)):
for j in range(len(self.crosswordres[0])):
if self.crossword[i][j]=='#':
self.crosswordres[i][j]='#'
else:
self.crosswordres[i][j]=' '
def populate(self):
for (word,x) in zip(self.word_batch,self.word_batch_pos):
if x[2] == 0:
for i in range(len(word)):
if word[i] != '':
self.crosswordres[x[0]][x[1]+i]=word[i]
elif x[2] == 1:
for i in range(len(word)):
if word[i] != '':
self.crosswordres[x[0]+i][x[1]]=word[i]
def heuristic(self,L):
score=0
for i in range(len(L)):
if len(L[i])==len(self.word_batch[i]):
score+=1
else:
score-=1
return score
def solve(self):
combo_words_list=[]
templist=[]
combo_words=list(itertools.permutations(self.allwords,len(self.allwords)))
for x in combo_words:
templist=[]
templist.append(self.heuristic(x))
templist.extend(list(x))
combo_words_list.append(templist)
combo_words_list.sort(key=lambda p: p[0],reverse=True)
jflag=True
iflag=True
for i_1 in [x for x in combo_words_list]:
i=i_1[1:]
iflag=True
self.clear()
for j in range(len(i)):
jflag=True
if len(i[j])==len(self.word_batch[j]):
self.word_batch[j]=list(i[j])
self.populate()
else:
if j==0:
iflag=False
print('------------------------------')
print("Current Word:",i[j])
for k in range(len(self.crosswordres)):
print(self.crosswordres[k])
break
print('------------------------------')
print("Current Word:",i[j])
for k in range(len(self.crosswordres)):
print(self.crosswordres[k])
jflag=self.checkconstraints()
if jflag==False:
break
elif jflag== True and j==len(i)-1:
self.completed_flag=True
break
if iflag==False:
break
if self.completed_flag==True:
break
cw1 = Crossword()
cw1.solve()