[Pyparsing] Pyparsing equivalent to regex \1, \2 ... patterns

[Loïc B. <lo...@li...>]

Hi,

I would like to define a parser to detect strings containing repeated terms :

  - it should match 'A123A', 'B123B'
  - but not 'A123B'

With python re module, I would define a parser like this :

   parser = re.compile(r'(\w+)(\d+)\1')
  
Is there a pyparsing equivalent to re \1 and \2 patterns in pyparsing ?

-- 
Loïc