shutil to remove tree

  def tearDown(self):

    import deepchem

    import os

    import shutil

    data_dir = deepchem.utils.get_data_dir()

    bace_dir = os.path.join(data_dir, "bace_c")

    if os.path.exists(bace_dir):

      os.rmdir(bace_dir)

    delaney_dir = os.path.join(data_dir, "delaney")

    if os.path.exists(delaney_dir):

      os.rmdir(bace_dir)

    try:

      shutil.rmtree(bace_dir, ignore_errors=True)

    except:

      pass

  def test_dc_import(self):

    import deepchem