algorithm - use Python to quickly generate autocomplete suggestions -


i have set all_words of 6.5 million words. how can use python generate list of words begin given string?

obviously, can like

def completions(word_start):     ell = len(word_start)     return [w w in all_words if w[: ell] == word_start]

this works takes on order of second. faster way generate full list?

i guess fastest , space-efficient data structure kind of problems use prefix tree. after have parsed collection of words tree, lookup time should pretty fast. there seems python implementation out there.


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