code: def _partial_extraction_fixed(self, idx, extra_idx=0):
          
          myarray = np.array([])
          with open(self.abspath) as fobj:
              contents = fobj.readlines()[idx+extra_idx:]
              for line in contents:
                  try:
                      vals = re.findall(r' *[\w\-\+\.]*', line)
                      temp = np.array([float(val) for val in vals
                                       if val not in ('', '     ')])
                      myarray = np.hstack((myarray, temp))
                  except ValueError:
                      break
          return myarray
docs: Private method for a single extraction on a fixed-type tab file