Grammalecte  Diff

"""
# Very simple tokenizer
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<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 }
        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 }