Commit 60a35946 authored by MorBoos's avatar MorBoos

spellcheck

parent 1a5644ce
import re
from collections import Counter
import helpers as hlp
def words(text): return re.findall(r'\w+', text.lower())
def P(word, rank):
"Probability of `word`."
# use inverse of rank as proxy
# returns 0 if the word isn't in the dictionary
return - rank.get(word, 0)
def correction(word):
"Most probable spelling correction for word."
return max(candidates(word), key=P)
def candidates(word):
"Generate possible spelling corrections for word."
return (known([word]) or known(edits1(word)) or known(edits2(word)) or [word])
def known(words):
"The subset of `words` that appear in the dictionary of WORDS."
return set(w for w in words if w in WORDS)
def edits1(word):
"All edits that are one edit away from `word`."
letters = 'abcdefghijklmnopqrstuvwxyz'
splits = [(word[:i], word[i:]) for i in range(len(word) + 1)]
deletes = [L + R[1:] for L, R in splits if R]
transposes = [L + R[1] + R[0] + R[2:] for L, R in splits if len(R)>1]
replaces = [L + c + R[1:] for L, R in splits if R for c in letters]
inserts = [L + c + R for L, R in splits for c in letters]
reductions = [re.sub(r'([{}])\1+'.format(i), r'\1', word) for i in set(word)]
return set(deletes + transposes + replaces + inserts)
def edits2(word):
"All edits that are two edits away from `word`."
return (e2 for e1 in edits1(word) for e2 in edits1(e1))
# That's it. If you have downloaded word2vec then you can start using this code. Here are few examples of what it does.
#
# correction('quikly') returns quickly
#
# correction('israil') returns israel
#
# correction('neighbour') returns neighbor
# If you like this notebook then please upvote (button at the top right).
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