cti-python-stix2: Filtering for un-revoked objects does not work without explicit revoked=False

I use Python 3.6, with the latest github stix2 version If you try to filtre for revoked (or not revoked) objects on FileSystemStore and MemoryStore you obtain errors or incorrect behaviours

Example from stix2 import FileSystemStore, MemoryStore, Filter, AttackPattern fs = FileSystemStore('/Users/andrea/test') mem = MemoryStore() filt_false = Filter('revoked', '=', False) filt_true = Filter('revoked', '=', True) patt1 = AttackPattern(name='test1') patt2 = AttackPattern(name='test2') fs.add(patt1) mem.add(patt2)

fs.query(filt_false) Traceback (most recent call last): File “<stdin>”, line 1, in <module> File “/usr/local/lib/python3.6/site-packages/stix2/sources/init.py”, line 90, in query return self.source.query(*args, **kwargs) File “/usr/local/lib/python3.6/site-packages/stix2/sources/filesystem.py”, line 298, in query stix_obj = json.load(open(os.path.join(root, file_))) File “/usr/local/Cellar/python3/3.6.4_2/Frameworks/Python.framework/Versions/3.6/lib/python3.6/json/init.py”, line 296, in load return loads(fp.read(), File “/usr/local/Cellar/python3/3.6.4_2/Frameworks/Python.framework/Versions/3.6/lib/python3.6/codecs.py”, line 321, in decode (result, consumed) = self._buffer_decode(data, self.errors, final) UnicodeDecodeError: ‘utf-8’ codec can’t decode byte 0x85 in position 1083: invalid start byte

fs.query(filt_true) Traceback (most recent call last): File “<stdin>”, line 1, in <module> File “/usr/local/lib/python3.6/site-packages/stix2/sources/init.py”, line 90, in query return self.source.query(*args, **kwargs) File “/usr/local/lib/python3.6/site-packages/stix2/sources/filesystem.py”, line 298, in query stix_obj = json.load(open(os.path.join(root, file_))) File “/usr/local/Cellar/python3/3.6.4_2/Frameworks/Python.framework/Versions/3.6/lib/python3.6/json/init.py”, line 296, in load return loads(fp.read(), File “/usr/local/Cellar/python3/3.6.4_2/Frameworks/Python.framework/Versions/3.6/lib/python3.6/codecs.py”, line 321, in decode (result, consumed) = self._buffer_decode(data, self.errors, final) UnicodeDecodeError: ‘utf-8’ codec can’t decode byte 0x85 in position 1083: invalid start byte

mem.query(filt_false) []

mem.query(filt_true) []

patt1 = patt1.revoke() patt2 = patt2.revoke() fs.add(patt1) mem.add(patt2)

fs.query(filt_true) Traceback (most recent call last): File “<stdin>”, line 1, in <module> File “/usr/local/lib/python3.6/site-packages/stix2/sources/init.py”, line 90, in query return self.source.query(*args, **kwargs) File “/usr/local/lib/python3.6/site-packages/stix2/sources/filesystem.py”, line 298, in query stix_obj = json.load(open(os.path.join(root, file_))) File “/usr/local/Cellar/python3/3.6.4_2/Frameworks/Python.framework/Versions/3.6/lib/python3.6/json/init.py”, line 296, in load return loads(fp.read(), File “/usr/local/Cellar/python3/3.6.4_2/Frameworks/Python.framework/Versions/3.6/lib/python3.6/codecs.py”, line 321, in decode (result, consumed) = self._buffer_decode(data, self.errors, final) UnicodeDecodeError: ‘utf-8’ codec can’t decode byte 0x85 in position 1083: invalid start byte

mem.query(filt_false) []

mem.query(filt_true) [AttackPattern(type=‘attack-pattern’, id=‘attack-pattern–3e65f786-25a0-471d-8ab8-1929313424a3’, created=‘2018-01-19T09:29:36.104Z’, modified=‘2018-01-19T09:30:49.983Z’, name=‘test2’, revoked=True)]