Python 3 bug in creating snapshot

[dr-rodriguez]

When creating a snapshot of the database under Python 3.6, I encounter the following bug:

db.snapshot('bdnyc_database_v2.db', version=2.0)

Traceback (most recent call last):
  File "/Users/drodriguez/anaconda3/lib/python3.6/site-packages/IPython/core/interactiveshell.py", line 2862, in run_code
    exec(code_obj, self.user_global_ns, self.user_ns)
  File "<ipython-input-27-2658bf42af4e>", line 1, in <module>
    db.snapshot('bdnyc_database_v2.db', version=2.0)
  File "/Users/drodriguez/PycharmProjects/astrodbkit/astrodbkit/astrodb.py", line 1887, in snapshot
    t, = self.query("select sql from sqlite_master where type = 'table'", unpack=True)
TypeError: iteration over a 0-d array