Unable to import zymkey in python

Python 2.7.13 (default, Sep 26 2018, 18:42:22)
[GCC 6.3.0 20170516] on linux2
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import zymkey
Traceback (most recent call last):
File “”, line 1, in
File “/home/pi/.local/lib/python2.7/site-packages/zymkey/init.py”, line 3, in
from .module import Zymkey
File “/home/pi/.local/lib/python2.7/site-packages/zymkey/module.py”, line 50, in
raise ZymkeyLibraryError(‘unable to find {}, checked {}’.format(os.path.basename(ZYMKEY_LIBRARY_PATH), prefixes))
zymkey.exceptions.ZymkeyLibraryError: unable to find libzk_app_utils.so, checked [’/usr/lib/python2.7/dist-packages/usr/local/lib’, ‘/usr/local/lib’]