init tests

import os 

import unittest

from deepchem.trans.transformers import RxnSplitTransformer

class TestRxnSplitTransformer(unittest.TestCase):

    """Tests the Reaction split transformer for the source/target splitting and

    for the reagent mixing operation.

    """

    def test_split(self):

        """

        Tests the source/target split from an input reaction SMILES.

        """

    def test_mixing(self):

        """

        Tests the reagent - reactant mixing option.

        """

        pass 

  -----

  This class only transforms the feature field of a reaction dataset like USPTO.

  """

  def __init__(self, sep_reagent: bool):

  def __init__(self, sep_reagent: bool, dataset: Optional[Dataset] = None):

    # the transformer would have to split the source and target sequences

    # would also consider adding the option of separating the reagent here.

    if self.sep_reagent:

      source = [x + '>' + y for x, y in zip(reactant, reagent)]

    else:

      source = [x + '.' + y + '>' if y else x + '>' + y for x,y in zip(reactant, reagent)]

      source = [

          x + '.' + y + '>' if y else x + '>' + y

          for x, y in zip(reactant, reagent)

      ]

    target = product