我试图根据the tutorial:使用SQLAlchemy设置一个带有Flask的sqlite数据库
尝试运行db.create_all()时出现以下错误：
(venv)[username@md projectname]$ python
Python 2.7.9 (default, Jan 12 2015, 10:50:37)
[GCC 4.4.7 20120313 (Red Hat 4.4.7-11)] on linux2
Type "help", "copyright", "credits" or "license" for more information.
>>> from app import db
/home/username/flask-project/projectname/venv/lib/python2.7/site-packages/flask_sqlalchemy/__init__.py:800: UserWarning: SQLALCHEMY_TRACK_MODIFICATIONS adds significant overhead and will be disabled by default in the future. Set it to True to suppress this warning.
warnings.warn('SQLALCHEMY_TRACK_MODIFICATIONS adds significant overhead and will be disabled by default in the future. Set it to True to suppress this warning.')
>>> db.create_all()
/home/username/flask-project/projectname/venv/lib/python2.7/site-packages/sqlalchemy/engine/default.py:298: SAWarning: Exception attempting to detect unicode returns: OperationalError('(sqlite3.OperationalError) near "\xf1\x90\x81\x93\xf1\x90\x81\x8c\xf5\x80\x81\x83\xf0\xb0\x80\xa0\xf4\xb0\x81\x81\xfa\x80\x81\x94\xfd\x80\x80\xa7\xfc\xb0\x81\xa5\xf8\x80\x81\xb4\xfb\x80\x81\xb0\xfa\x90\x81\xa1\xf8\x80\x81\xae\xf9\x90\x81\xb2\xfd\x90\x81\xb4\xfb\xa0\x81\xb2\xf9\xb0\x81\xb3\xf0\x90\x80\xa0\xf8\x80\x81\x93\xf0\x90\x81\x96\xf0\xb0\x81\x92\xf0\x90\x81\x88\xfa\x80\x81\x92\xfc\x80\x80\xb6\xfa\x90\x80\xa9\xf0\x90\x80\xa0\xf8\x80\x81\x93\xfb\xa0\x81\xa1\xfb\xa0\x81\xaf\xfc\x90\x81\x9f\xfe\x90\x80\x80": syntax error',)
"detect unicode returns: %r" % de)
/home/username/flask-project/projectname/venv/lib/python2.7/site-packages/sqlalchemy/engine/default.py:298: SAWarning: Exception attempting to detect unicode returns: OperationalError('(sqlite3.OperationalError) near "\xf1\x90\x81\x93\xf1\x90\x81\x8c\xf5\x80\x81\x83\xf0\xb0\x80\xa0\xf4\xb0\x81\x81\xfa\x80\x81\x94\xfd\x80\x80\xa7\xfc\xb0\x81\xa5\xf8\x80\x81\xb4\xfb\xa0\x81\xb5\xf8\xb0\x81\xa9\xf9\x80\x81\xaf\xf8\x80\x81\xa5\xf9\x90\x81\xb2\xfd\x90\x81\xb4\xfb\xa0\x81\xb2\xf9\xb0\x81\xb3\xf0\x90\x80\xa0\xf8\x80\x81\x93\xf0\x90\x81\x96\xf0\xb0\x81\x92\xf0\x90\x81\x88\xfa\x80\x81\x92\xfc\x80\x80\xb6\xfa\x90\x80\xa9\xf0\x90\x80\xa0\xf8\x80\x81\x93\xfb\xa0\x81\xa1\xfb\xa0\x81\xaf\xfc\x90\x81\x9f\xfc\xa0\x80\x80": syntax error',)
"detect unicode returns: %r" % de)
Traceback (most recent call last):
File "<stdin>", line 1, in <module>
File "/home/username/flask-project/projectname/venv/lib/python2.7/site-packages/flask_sqlalchemy/__init__.py", line 972, in create_all
self._execute_for_all_tables(app, bind, 'create_all')
File "/home/username/flask-project/projectname/venv/lib/python2.7/site-packages/flask_sqlalchemy/__init__.py", line 964, in _execute_for_all_tables
op(bind=self.get_engine(app, bind), **extra)
File "/home/username/flask-project/projectname/venv/lib/python2.7/site-packages/sqlalchemy/sql/schema.py", line 3695, in create_all
tables=tables)
File "/home/username/flask-project/projectname/venv/lib/python2.7/site-packages/sqlalchemy/engine/base.py", line 1855, in _run_visitor
with self._optional_conn_ctx_manager(connection) as conn:
File "/usr/local/lib/python2.7/contextlib.py", line 17, in __enter__
return self.gen.next()
File "/home/username/flask-project/projectname/venv/lib/python2.7/site-packages/sqlalchemy/engine/base.py", line 1848, in _optional_conn_ctx_manager
with self.contextual_connect() as conn:
File "/home/username/flask-project/projectname/venv/lib/python2.7/site-packages/sqlalchemy/engine/base.py", line 2039, in contextual_connect
self._wrap_pool_connect(self.pool.connect, None),
File "/home/username/flask-project/projectname/venv/lib/python2.7/site-packages/sqlalchemy/engine/base.py", line 2078, in _wrap_pool_connect
e, dialect, self)
File "/home/username/flask-project/projectname/venv/lib/python2.7/site-packages/sqlalchemy/engine/base.py", line 1405, in _handle_dbapi_exception_noconnection
exc_info
File "/home/username/flask-project/projectname/venv/lib/python2.7/site-packages/sqlalchemy/util/compat.py", line 200, in raise_from_cause
reraise(type(exception), exception, tb=exc_tb, cause=cause)
File "/home/username/flask-project/projectname/venv/lib/python2.7/site-packages/sqlalchemy/engine/base.py", line 2074, in _wrap_pool_connect
return fn()
File "/home/username/flask-project/projectname/venv/lib/python2.7/site-packages/sqlalchemy/pool.py", line 376, in connect
return _ConnectionFairy._checkout(self)
File "/home/username/flask-project/projectname/venv/lib/python2.7/site-packages/sqlalchemy/pool.py", line 713, in _checkout
fairy = _ConnectionRecord.checkout(pool)
File "/home/username/flask-project/projectname/venv/lib/python2.7/site-packages/sqlalchemy/pool.py", line 480, in checkout
rec = pool._do_get()
File "/home/username/flask-project/projectname/venv/lib/python2.7/site-packages/sqlalchemy/pool.py", line 1151, in _do_get
return self._create_connection()
File "/home/username/flask-project/projectname/venv/lib/python2.7/site-packages/sqlalchemy/pool.py", line 323, in _create_connection
return _ConnectionRecord(self)
File "/home/username/flask-project/projectname/venv/lib/python2.7/site-packages/sqlalchemy/pool.py", line 454, in __init__
exec_once(self.connection, self)
File "/home/username/flask-project/projectname/venv/lib/python2.7/site-packages/sqlalchemy/event/attr.py", line 246, in exec_once
self(*args, **kw)
File "/home/username/flask-project/projectname/venv/lib/python2.7/site-packages/sqlalchemy/event/attr.py", line 256, in __call__
fn(*args, **kw)
File "/home/username/flask-project/projectname/venv/lib/python2.7/site-packages/sqlalchemy/util/langhelpers.py", line 1319, in go
return once_fn(*arg, **kw)
File "/home/username/flask-project/projectname/venv/lib/python2.7/site-packages/sqlalchemy/engine/strategies.py", line 165, in first_connect
dialect.initialize(c)
File "/home/username/flask-project/projectname/venv/lib/python2.7/site-packages/sqlalchemy/engine/default.py", line 256, in initialize
self._check_unicode_description(connection):
File "/home/username/flask-project/projectname/venv/lib/python2.7/site-packages/sqlalchemy/engine/default.py", line 343, in _check_unicode_description
]).compile(dialect=self)
sqlalchemy.exc.OperationalError: (sqlite3.OperationalError) near "???????3???￥": syntax error
>>>
答案 0 :(得分：0)
这些字符会出现问题：
???????3???￥
根据您发布的内容，目前尚不清楚，但您可能会在您用于构建数据库的文件中。该文件中的字符需要采用可以解释的字符编码。