当我运行脚本时，我得到以下输出：
/app/venv/lib/python2.7/site-packages/flask/exthook.py:71: ExtDeprecationWarning: Importing flask.ext.sqlalchemy is deprecated, use flask_sqlalchemy instead.
.format(x=modname), ExtDeprecationWarning
/app/venv/lib/python2.7/site-packages/flask/exthook.py:71: ExtDeprecationWarning: Importing flask.ext.marshmallow is deprecated, use flask_marshmallow instead.
.format(x=modname), ExtDeprecationWarning
/app/venv/lib/python2.7/site-packages/flask/exthook.py:71: ExtDeprecationWarning: Importing flask.ext.cache is deprecated, use flask_cache instead.
.format(x=modname), ExtDeprecationWarning
/app/venv/lib/python2.7/site-packages/flask/exthook.py:71: ExtDeprecationWarning: Importing flask.ext.restful is deprecated, use flask_restful instead.
.format(x=modname), ExtDeprecationWarning
/app/venv/lib/python2.7/site-packages/flask/exthook.py:71: ExtDeprecationWarning: Importing flask.ext.restful.fields is deprecated, use flask_restful.fields instead.
.format(x=modname), ExtDeprecationWarning
/app/venv/lib/python2.7/site-packages/flask/exthook.py:71: ExtDeprecationWarning: Importing flask.ext.restful.reqparse is deprecated, use flask_restful.reqparse instead.
.format(x=modname), ExtDeprecationWarning
/app/venv/lib/python2.7/site-packages/flask/exthook.py:71: ExtDeprecationWarning: Importing flask.ext.restplus is deprecated, use flask_restplus instead.
.format(x=modname), ExtDeprecationWarning
/app/venv/lib/python2.7/site-packages/flask/exthook.py:71: ExtDeprecationWarning: Importing flask.ext.restful.representations is deprecated, use flask_restful.representations instead.
.format(x=modname), ExtDeprecationWarning
/app/venv/lib/python2.7/site-packages/flask/exthook.py:71: ExtDeprecationWarning: Importing flask.ext.script is deprecated, use flask_script instead.
.format(x=modname), ExtDeprecationWarning
/app/venv/lib/python2.7/site-packages/flask/exthook.py:71: ExtDeprecationWarning: Importing flask.ext.migrate is deprecated, use flask_migrate instead.
.format(x=modname), ExtDeprecationWarning
我真的不在乎这个，因为外部库导致了这个。我无法更新这些库，因为我不拥有它们，而且我发现有几个库有待处理的拉取请求。
我怎样才能得到一些平静和安宁呢？
从 Flask 1.0 开始，flask.ext不存在。没有修复这些导入的软件包将无法工作。
首先你should关心这一点是因为您使用的软件包不是最新的。报告一个错误，他们应该切换到使用直接导入名称，例如flask_sqlalchemy，而不是flask.ext导入钩子。
Add a warnings.simplefilter行来过滤掉这些警告。在执行任何会引发警告的导入之前，您可以将其放置在配置应用程序的任何位置。
import warnings
from flask.exthook import ExtDeprecationWarning
warnings.simplefilter('ignore', ExtDeprecationWarning)
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