class_docstr: Parser for fortran format strings. The parse method returns a *Format
  instance.
  
  Notes
  -----
  Only ExpFormat (exponential format for floating values) and IntFormat
  (integer format) for now.
code: def _next(self, tokens, tp):
      if not len(tokens) > 0:
          raise SyntaxError()
      next = tokens.pop(0)
      self._expect(next, tp)
      return next
  
imports: from __future__ import division, print_function, absolute_import
  import re
  import numpy
label_desc: Use image node_id 6 for calling the FortranFormatParser obj's underlying member method code with example usage: obj._next(tokens, tp) and returns: next