if stop is None:
stop = len(lexicon)
if start >= stop:
return False
else:
midIndex = (start + stop)//2
if lexicon[midIndex].startswith(target): # found prefix
return True
elif target < lexicon[midIndex]: # check left side
return prefixSearch(lexicon, target, start, midIndex)
else: # check right side
return prefixSearch(lexicon, target, midIndex+1, stop)
if __name__ == '__main__':
from FileUtilities import readWordFile
lexicon = readWordFile()
lexicon.sort()
goal = raw_input('enter a potential word [return to quit]: ')
while goal:
if search(lexicon, goal):
print goal, 'as a word: found'
else:
print goal, 'as a word: not found'
if prefixSearch(lexicon, goal):
print goal, 'as a prefix: found'
else:
print goal, 'as a prefix: not found'
goal = raw_input('enter a potential word [return to quit]: ')
"""
solutions = []
if len(charsToUse) > 1:
for i in range(len(charsToUse)): # pick charsToUse[i] next
newPrefix = prefix + charsToUse[i]
if prefixSearch(lexicon, newPrefix): # worth exploring
newCharsToUse = charsToUse[ : i] + charsToUse[i+1 : ]
solutions.extend(anagrams(lexicon, newCharsToUse, newPrefix))
else: # check to see if we have a good solution
candidate = prefix + charsToUse
if search(lexicon, candidate): # use binary search
solutions.append(candidate)
return solutions
if __name__ == '__main__':
from FileUtilities import readWordFile
print 'Will begin by reading the file of words.'
words = readWordFile()
words.sort()
puzzle = raw_input('enter a string of characters to use: ')
while puzzle:
solutions = anagrams(words, puzzle)
if solutions:
solutions = list(set(solutions)) # remove duplicates
solutions.sort()
print 'Solutions include:'
print '\n'.join(solutions)
puzzle = raw_input('enter a string of characters to use: ')