class_docstr: Lexer for `Turtle <http://www.w3.org/TR/turtle/>`_ data language.
  
  .. versionadded:: 2.1
code: def analyse_text(text):
      for t in ("@base ", "BASE ", "@prefix ", "PREFIX "):
          if re.search(r"^\s*%s" % t, text):
              return 0.80
  
file_path: catboost/contrib/python/Pygments/py2/pygments/lexers/rdf.py
imports: import re
  from pygments.lexer import RegexLexer, bygroups, default
  from pygments.token import Keyword, Punctuation, String, Number, Operator, Generic, Whitespace, Name, Literal, Comment, Text
label_desc: Use image node_id 1 for calling the TurtleLexer obj's underlying member method code with example usage: obj.analyse_text(text) and returns: int