importorror:没有安装名为'flask_sqlalchemy'的模块,其中包含2个版本的Python

尝试使用以下导入运行文件:

from flask_sqlalchemy import sqlalchemy
from sqlalchemy import create_engine
from sqlalchemy.orm import scoped_session, sessionmaker

收到以下错误:

ImportError: No module named 'flask_sqlalchemy'

已安装SQLAlchemy。不过,我还是试着重新安装到使用它的目录中。我明白了:

The directory '/Users/_/Library/Caches/pip/http' or its parent directory is not owned by the current user and the cache has been disabled. Please check the permissions and owner of that directory. If executing pip with sudo, you may want sudo's -H flag.
The directory '/Users/_/Library/Caches/pip' or its parent directory is not owned by the current user and caching wheels has been disabled. check the permissions and owner of that directory. If executing pip with sudo, you may want sudo's -H flag.
Requirement already satisfied: Flask-SQLAlchemy in /Library/Python/2.7/site-packages (2.3.2)
Requirement already satisfied: Flask>=0.10 in /Library/Python/2.7/site-packages (from Flask-SQLAlchemy) (1.0.2)
Requirement already satisfied: SQLAlchemy>=0.8.0 in /Library/Python/2.7/site-packages (from Flask-SQLAlchemy) (1.2.10)
Requirement already satisfied: Jinja2>=2.10 in /Library/Python/2.7/site-packages (from Flask>=0.10->Flask-SQLAlchemy) (2.10)
Requirement already satisfied: itsdangerous>=0.24 in /Library/Python/2.7/site-packages (from Flask>=0.10->Flask-SQLAlchemy) (0.24)
Requirement already satisfied: Werkzeug>=0.14 in /Library/Python/2.7/site-packages (from Flask>=0.10->Flask-SQLAlchemy) (0.14.1)
Requirement already satisfied: click>=5.1 in /Library/Python/2.7/site-packages (from Flask>=0.10->Flask-SQLAlchemy) (6.7)
Requirement already satisfied: MarkupSafe>=0.23 in /Library/Python/2.7/site-packages (from Jinja2>=2.10->Flask>=0.10->Flask-SQLAlchemy) (1.0)

关于我不拥有这个目录的说法是不正确的。我是这台机器上唯一的一个。我拥有一切。

无论如何,我回去重新运行该文件并得到相同的错误消息。所以,它已经安装,但还没有安装,或者,至少,对我来说是不可用的。

当我注释掉其中一个import语句时,看到一条错误消息如下:

File "/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/sqlalchemy/engine/strategies.py

我不知道如何解决这个问题,让SQLAlchemy启动并运行。我已经在上面烧了1.5个小时了。最后列出的错误表明,有两个版本的python可能与此有关。

希望你能考虑一下补救措施。