我正在尝试配置Superset以从Phoenix数据库中读取数据。我已根据SQLAlchemy添加了instructions个库，但当我尝试“添加数据库”时，我得到以下异常：
The error message returned was:
No module named 'base'
我在superset.log中没有看到任何消息，所以我对如何排除故障感到茫然。这是venv中的python模块列表
alembic (0.9.6)
amqp (1.4.9)
anyjson (0.3.3)
Babel (2.5.1)
billiard (3.3.0.23)
celery (3.1.23)
cffi (1.11.2)
click (6.7)
colorama (0.3.9)
cryptography (1.5.3)
defusedxml (0.5.0)
Flask (0.12.2)
Flask-AppBuilder (1.8.1)
Flask-Babel (0.11.2)
Flask-Cache (0.13.1)
Flask-Login (0.2.11)
Flask-Migrate (1.5.1)
Flask-OpenID (1.2.5)
Flask-Script (2.0.5)
Flask-SQLAlchemy (2.0)
Flask-Testing (0.5.0)
Flask-WTF (0.14.2)
future (0.16.0)
gunicorn (19.6.0)
humanize (0.5.1)
idna (2.6)
itsdangerous (0.24)
JayDeBeApi (1.1.1)
Jinja2 (2.10)
JPype1 (0.6.2)
kerberos (1.2.5)
kombu (3.0.37)
Mako (1.0.7)
Markdown (2.6.6)
MarkupSafe (1.0)
numpy (1.14.0rc1)
pandas (0.21.1)
parsedatetime (2.0)
phoenixdb (0.7)
pip (9.0.1)
protobuf (3.5.2)
pyasn1 (0.4.2)
pycparser (2.18)
pydruid (0.3.0)
PyGreSQL (5.0.3)
PyHive (0.5.0)
PyMySQL (0.7.9)
python-dateutil (2.5.3)
python-editor (1.0.3)
python3-openid (3.1.0)
pytz (2017.3)
requests (2.10.0)
sasl (0.2.1)
setuptools (38.5.2)
simplejson (3.8.2)
six (1.11.0)
SQLAlchemy (1.2.5)
sqlalchemy-phoenix (0.3.0)
SQLAlchemy-Utils (0.32.7)
sqlparse (0.1.19)
superset (0.15.0)
thrift (0.10.0)
thrift-sasl (0.3.0)
urllib-kerberos (0.2.0)
Werkzeug (0.11.10)
WTForms (2.1)