"""
Very simple tokenizer
using regular expressions
"""
import re
_PATTERNS = {
"default":
(
r'(?P<FOLDERUNIX>/(?:bin|boot|dev|etc|home|lib|mnt|opt|root|sbin|tmp|usr|var|Bureau|Documents|Images|Musique|Public|Téléchargements|Vidéos)(?:/[\w.()-]+)*)',
r'(?P<FOLDERWIN>[a-zA-Z]:\\(?:Program Files(?: [(]x86[)]|)|[\w.()]+)(?:\\[\w.()-]+)*)',
r'(?P<PUNC>[][,.;:!?…«»“”‘’"(){}·–—¿¡])',
r'(?P<WORD_ACRONYM>[A-Z][.][A-Z][.](?:[A-Z][.])*)',
r'(?P<LINK>(?:https?://|www[.]|\w+[@.]\w\w+[@.])\w[\w./?&!%=+*"\'@$#-]+)',
r'(?P<HASHTAG>[#@][\w-]+)',
r'(?P<HTML><\w+.*?>|</\w+ *>)',
r'(?P<PSEUDOHTML>\[/?\w+\])',
r'(?P<HOUR>\d\d?h\d\d\b)',
r'(?P<NUM>\d+(?:[.,]\d+))',
r'(?P<SIGN>[&%‰€$+±=*/<>⩾⩽#|×¥£§¢¬÷@-])',
r"(?P<WORD>\w+(?:[’'`-]\w+)*)"
),
"fr":
(
r'(?P<FOLDERUNIX>/(?:bin|boot|dev|etc|home|lib|mnt|opt|root|sbin|tmp|usr|var|Bureau|Documents|Images|Musique|Public|Téléchargements|Vidéos)(?:/[\w.()-]+)*)',
r'(?P<FOLDERWIN>[a-zA-Z]:\\(?:Program Files(?: [(]x86[)]|)|[\w.()]+)(?:\\[\w.()-]+)*)',
r'(?P<PUNC>[][,.;:!?…«»“”‘’"(){}·–—¿¡])',
r'(?P<WORD_ACRONYM>[A-Z][.][A-Z][.](?:[A-Z][.])*)',
r'(?P<LINK>(?:https?://|www[.]|\w+[@.]\w\w+[@.])\w[\w./?&!%=+*"\'@$#-]+)',
r'(?P<HASHTAG>[#@][\w-]+)',
r'(?P<HTML><\w+.*?>|</\w+ *>)',
r'(?P<PSEUDOHTML>\[/?\w+\])',
r"(?P<WORD_ELIDED>(?:l|d|n|m|t|s|j|c|ç|lorsqu|puisqu|jusqu|quoiqu|qu)['’`])",
r'(?P<WORD_ORDINAL>\d+(?:ers?|nds?|es?|des?|ièmes?|èmes?|emes?|ᵉʳˢ?|ⁿᵈˢ?|ᵉˢ?|ᵈᵉˢ?)\b)',
r'(?P<HOUR>\d\d?h\d\d\b)',
r'(?P<NUM>\d+(?:[.,]\d+|))',
r'(?P<SIGN>[&%‰€$+±=*/<>⩾⩽#|×¥£¢§¬÷@-])',
r"(?P<WORD>\w+(?:[’'`-]\w+)*)"
)
}
class Tokenizer:
"Tokenizer: transforms a text in a list of tokens"
def __init__ (self, sLang):
self.sLang = sLang
if sLang not in _PATTERNS:
self.sLang = "default"
self.zToken = re.compile( "(?i)" + '|'.join(sRegex for sRegex in _PATTERNS[sLang]) )
def genTokens (self, sText, bStartEndToken=False):
"generator: tokenize <sText>"
i = 0
if bStartEndToken:
yield { "i": 0, "sType": "INFO", "sValue": "<start>", "nStart": 0, "nEnd": 0, "lMorph": ["<start>"] }
for i, m in enumerate(self.zToken.finditer(sText), 1):
yield { "i": i, "sType": m.lastgroup, "sValue": m.group(), "nStart": m.start(), "nEnd": m.end() }
if bStartEndToken:
iEnd = len(sText)
yield { "i": i+1, "sType": "INFO", "sValue": "<end>", "nStart": iEnd, "nEnd": iEnd, "lMorph": ["<end>"] }