class_docstr: RE is the base class for regular expression constructors.
  The following operators are defined on REs:
  
       re1 + re2         is an RE which matches |re1| followed by |re2|
       re1 | re2         is an RE which matches either |re1| or |re2|
class_docstr_tok: ["RE","is","the","base","class","for","regular","expression","constructors",".","The","following","operators","are","defined","on","REs",":","re1","+","re2","is","an","RE","which","matches","|re1|","followed","by","|re2|","re1","|","re2","is","an","RE","which","matches","either","|re1|","or","|re2|"]
code: def __add__(self, other):
      return Seq(self, other)
  
imports: from __future__ import absolute_import
  import types
  from .None import Errors
label_desc: Use image node_id 3 for calling the RE obj's underlying member method code with example usage: obj.__add__(other) and returns: Seq