43 lines
1.3 KiB
Python
43 lines
1.3 KiB
Python
from __future__ import absolute_import
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import re
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from . import BackendBase
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class LanguageBackend(BackendBase):
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def check_word(self, word):
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ALL_ALPHANUM = re.compile('([0-9a-z])', re.I)
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NON_ALPHANUM = re.compile('([^0-9a-z])', re.I)
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TOO_MANY_VOWELS = re.compile('[aeiou]{3}', re.I)
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TOO_MANY_CONSONANTS = re.compile('[bcdfghjklmnpqrstvwxyz]{5}', re.I)
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SINGLE_LETTER_WORDS = re.compile('^[ai]$', re.I)
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# (L) If a string is longer than 20 characters, it is garbage
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if len(word) > 20:
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return None
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# (A) If a string's ratio of alphanumeric characters to total
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# characters is less than 50%, the string is garbage
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if len(ALL_ALPHANUM.findall(word)) < len(word) / 2:
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return None
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# Remove word if all the letters in the word are non alphanumeric
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if len(NON_ALPHANUM.findall(word)) == len(word):
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return None
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# Removed words with too many consecutie vowels
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if TOO_MANY_VOWELS.findall(word):
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return None
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# Removed words with too many consecutie consonants
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if TOO_MANY_CONSONANTS.findall(word):
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return None
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# Only allow specific single letter words
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if len(word) == 1 and not SINGLE_LETTER_WORDS.findall(word):
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return None
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return word
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