code: def pystr(v_str):
      
      assert isinstance(v_str, str)
  
      if v_str[0] in ("'", '"') and v_str[0] == v_str[-1]:
          quote = v_str[0]
          out = v_str[1:-1]
      else:
          # NOTE: This is non-standard Fortran.
          #       For example, gfortran rejects non-delimited strings.
          quote = None
          out = v_str
  
      # Replace escaped strings
      if quote:
          out = out.replace(2 * quote, quote)
  
      return out
docs: Convert string repr of Fortran string to Python string.