docstr: Parse a set of alternative regexps.
docstr_tok: ["Parse","a","set","of","alternative","regexps","."]
code: def parse_alt(self):
      """Parse a set of alternative regexps."""
      re = self.parse_seq()
      if self.c == "|":
          re_list = [re]
          while self.c == "|":
              self.next()
              re_list.append(self.parse_seq())
          re = Alt(*re_list)
      return re
  
file_path: catboost/contrib/tools/cython/Cython/Plex/Traditional.py
imports: from __future__ import absolute_import
  from .Regexps import Alt, Seq, Rep, Rep1, Opt, Any, AnyBut, Bol, Eol, Char
  from .Errors import PlexError
label_desc: Use image node_id 3 for calling the REParser obj's underlying member method code with example usage: obj.parse_alt() and returns: re