def _BuildIndex(self):
    self._index = {}
    for i, k in enumerate(self._keys):
      self._index[k] = i
Find all the ways to split f into a product of two terms.
dataset/ETHPy150Open google/textfsm/texttable.py/Row._BuildIndex--crossover with--dataset/ETHPy150Open sympy/sympy/sympy/integrals/meijerint.py/_mul_as_two_parts