AttributeError: module 'ophyd' has no attribute 'EpicsSignalBase'

[prjemian]

In [3]: object_explorer(tens)
---------------------------------------------------------------------------
AttributeError                            Traceback (most recent call last)
<ipython-input-3-cc4cea0a6087> in <module>
----> 1 object_explorer(tens)

/share1/bluesky/conda_envs/bluesky_2020_1/lib/python3.7/site-packages/apstools/utils.py in object_explorer(obj, sortby, fmt, printing)
    350     t.addLabel("PV reference")
    351     t.addLabel("value")
--> 352     items = _ophyd_structure_walker(obj)
    353     logger.debug(f"number of items: {len(items)}")
    354

/share1/bluesky/conda_envs/bluesky_2020_1/lib/python3.7/site-packages/apstools/utils.py in _ophyd_structure_walker(obj)
    328     """
    329     # import pdb; pdb.set_trace()
--> 330     if isinstance(obj, ophyd.EpicsSignalBase):
    331         return [obj]
    332     elif isinstance(obj, ophyd.Device):

AttributeError: module 'ophyd' has no attribute 'EpicsSignalBase'

In [4]:

[prjemian]

should be: ophyd.signal.EpicsSignalBase