Python SQLAlchemy中的依赖性问题？

我正在从中学习烧瓶教程，遇到了一个奇怪的错误：

    Traceback (most recent call last):
  File "./db_create.py", line 9, in <module>
    db.create_all()
  File "/Users/mateusz/microblog/flask/lib/python2.7/site-packages/flask_sqlalchemy/__init__.py", line 895, in create_all
    self._execute_for_all_tables(app, bind, 'create_all')
  File "/Users/mateusz/microblog/flask/lib/python2.7/site-packages/flask_sqlalchemy/__init__.py", line 887, in _execute_for_all_tables
    op(bind=self.get_engine(app, bind), **extra)
  File "/Users/mateusz/microblog/flask/lib/python2.7/site-packages/flask_sqlalchemy/__init__.py", line 833, in get_engine
    return connector.get_engine()
  File "/Users/mateusz/microblog/flask/lib/python2.7/site-packages/flask_sqlalchemy/__init__.py", line 499, in get_engine
    self._engine = rv = sqlalchemy.create_engine(info, **options)
  File "/Users/mateusz/microblog/flask/lib/python2.7/site-packages/sqlalchemy/engine/__init__.py", line 362, in create_engine
    return strategy.create(*args, **kwargs)
  File "/Users/mateusz/microblog/flask/lib/python2.7/site-packages/sqlalchemy/engine/strategies.py", line 51, in create
    dialect_cls = u.get_dialect()
  File "/Users/mateusz/microblog/flask/lib/python2.7/site-packages/sqlalchemy/engine/url.py", line 129, in get_dialect
    cls = registry.load(name)
  File "/Users/mateusz/microblog/flask/lib/python2.7/site-packages/sqlalchemy/util/langhelpers.py", line 194, in load
    (self.group, name))
sqlalchemy.exc.NoSuchModuleError: Can't load plugin: sqlalchemy.dialects:sqllite

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提前感谢您的帮助。

Sqlite只有一个“L”。希望这是唯一的问题

你可能在什么地方有打字错误吗？我相信它是一个L的“sqlite”，而不是两个。你完全正确。答案就是SQLALCHEMY_数据库_URI变量中的sqlite拼写错误。我将uri作为sqllite:///而不是sqlite提供：///

Babel==1.3
Flask==0.10.1
Flask-Babel==0.9
Flask-Login==0.2.11
Flask-Mail==0.9.1
Flask-OpenID==1.2.3
Flask-SQLAlchemy==2.0
Flask-WTF==0.10.2
Flask-WhooshAlchemy==0.56
Jinja2==2.7.3
MarkupSafe==0.23
SQLAlchemy==0.9.8
Tempita==0.5.2
WTForms==2.0.1
Werkzeug==0.9.6
Whoosh==2.6.0
blinker==1.3
coverage==3.7.1
decorator==3.4.0
flipflop==1.0
guess-language==0.2
itsdangerous==0.24
pbr==0.10.0
python-openid==2.2.5
pytz==2014.7
six==1.8.0
speaklater==1.3
sqlalchemy-migrate==0.9.2
sqlparse==0.1.13
wsgiref==0.1.2