How to create a trie in Python

Question

I\'m interested in tries and DAWGs (direct acyclic word graph) and I\'ve been reading a lot about them but I don\'t understand what should the output trie or DAWG file look

Answer 1

Using defaultdict and reduce function.

Create Trie

from functools import reduce
from collections import defaultdict
T = lambda : defaultdict(T)
trie = T()
reduce(dict.__getitem__,'how',trie)['isEnd'] = True

Trie :

defaultdict(()>,
            {'h': defaultdict(()>,
                         {'o': defaultdict(()>,
                                      {'w': defaultdict(()>,
                                                   {'isEnd': True})})})})

Search In Trie :

curr = trie
for w in 'how':
    if w in curr:
        curr = curr[w]
    else:
        print("Not Found")
        break
if curr['isEnd']:
    print('Found')