Hi,
The below script which prints anagrams available for any word available
within a given database. It does work, but it is not very fast. I am
relatively certain there are more Python friendly coding techniques but
I am more concerned with a faster algorithm.
The database item consists of the key; the actual word, and the value,
the size as a string. For example, the word 'myth' is represented as
key= 'myth', value = '4'. I think the slow part of the algorithm is the
script retrieves a list of all database words of length (myth)=4. That's
a lot of words. Each word is sorted and then compared to the alpha
sorted word. When there is a match, that word becomes a part of the
anagram list. Even a very basic look at the word 'myth' shows there are
no anagrams. So, to return an empty list, we have scanned all words in
the database of size 4.
I will be happy to send the first program and the original word file to
anyone who would like to implement the database. I could not attach
the database since that made this post way too large.
Any and all suggestions are most welcome.
#!/usr/bin/env python
##The second program is in a perpetual loop waiting on input. A 'Q '
will terminate the program.
##All input is by string; for example the word 'zygote' without the
quotes is a request for all possible anagrams
##created from all the letters in 'zygote'.
def get_key(d1, value):
return [item[0] for item in d1.items() if item[1] == value]
def Get_Anagrams(db,word):
Alist=list()
tulip1=tuple(word)
list1=list(tulip1)
list1.sort()
wordlist=get_key(db,str(len(word)))
for items in wordlist:
if items != word:
tulip2=tuple(items)
list2=list(tulip2)
list2.sort()
if list2==list1:
Alist.append(items)
if len(Alist)>0:
return Alist
else:
return None
def main():
import anydbm
db=anydbm.open('anagram.db','r')
Repeat=True
while Repeat != False:
word_in=str(raw_input('Input a word to build anagrams\nA Q will
quit the program: '))
if word_in=='Q':
Repeat = False
else:
if db.has_key(word_in) < 1:
print word_in,' is not in the dictionary\n'
else:
Anagrams=Get_Anagrams(db,word_in)
if Anagrams != None:
print 'Anagrams for ',word_in,' are ',Anagrams
else:
print word_in,' has no anagrams.'
db.close
return 0
if __name__ == '__main__': main()
Thanks,
Robert
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