Installing; "python manage.py syncdb" fails with "unable to open database file"

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I'm trying to install Askbot for the first time on a macOS Sierra system. I have Python 2.7.13 installed.

I followed the instructions at http://askbot.org "/doc/initial-configuration.html#compile-time-configuration". Now I'm trying to follow "/doc/initialize-database-tables.html". (Delinkified because my karma is too low to post links.) I run "python manage.py syncdb", and I get a lot of errors. How do I fix this and get Askbot installed?

mydjangosite $ python manage.py syncdb
WARNING!!! You are using a 'locmem' (local memory) caching backend,
which is OK for a low volume site running on a single-process server.
For a multi-process configuration it is neccessary to have a production
cache system, such as redis or memcached.

With local memory caching and multi-process setup you might intermittently
see outdated content on your site.

System check identified some issues:

WARNINGS:
django_authopenid.UserPasswordQueue.user: (fields.W342) Setting unique=True on a ForeignKey has the same effect as using a OneToOneField.
    HINT: ForeignKey(unique=True) is usually better served by a OneToOneField.
group_messaging.SenderList.recipient: (fields.W342) Setting unique=True on a ForeignKey has the same effect as using a OneToOneField.
    HINT: ForeignKey(unique=True) is usually better served by a OneToOneField.
Traceback (most recent call last):
  File "manage.py", line 10, in <module>
    execute_from_command_line(sys.argv)
  File "/usr/local/lib/python2.7/site-packages/django/core/management/__init__.py", line 354, in execute_from_command_line
    utility.execute()
  File "/usr/local/lib/python2.7/site-packages/django/core/management/__init__.py", line 346, in execute
    self.fetch_command(subcommand).run_from_argv(self.argv)
  File "/usr/local/lib/python2.7/site-packages/django/core/management/base.py", line 394, in run_from_argv
    self.execute(*args, **cmd_options)
  File "/usr/local/lib/python2.7/site-packages/django/core/management/base.py", line 445, in execute
    output = self.handle(*args, **options)
  File "/usr/local/lib/python2.7/site-packages/django/core/management/commands/syncdb.py", line 25, in handle
    call_command("migrate", **options)
  File "/usr/local/lib/python2.7/site-packages/django/core/management/__init__.py", line 120, in call_command
    return command.execute(*args, **defaults)
  File "/usr/local/lib/python2.7/site-packages/django/core/management/base.py", line 445, in execute
    output = self.handle(*args, **options)
  File "/usr/local/lib/python2.7/site-packages/django/core/management/commands/migrate.py", line 93, in handle
    executor = MigrationExecutor(connection, self.migration_progress_callback)
  File "/usr/local/lib/python2.7/site-packages/django/db/migrations/executor.py", line 19, in __init__
    self.loader = MigrationLoader(self.connection)
  File "/usr/local/lib/python2.7/site-packages/django/db/migrations/loader.py", line 47, in __init__
    self.build_graph()
  File "/usr/local/lib/python2.7/site-packages/django/db/migrations/loader.py", line 191, in build_graph
    self.applied_migrations = recorder.applied_migrations()
  File "/usr/local/lib/python2.7/site-packages/django/db/migrations/recorder.py", line 59, in applied_migrations
    self.ensure_schema()
  File "/usr/local/lib/python2.7/site-packages/django/db/migrations/recorder.py", line 49, in ensure_schema
    if self.Migration._meta.db_table in self.connection.introspection.table_names(self.connection.cursor()):
  File "/usr/local/lib/python2.7/site-packages/django/db/backends/base ...