我正在尝试安装 Flask,但是出现以下错误。它似乎与 Jinja2 有关,但是当我在 Jinja 上执行 pip list 和 grep 时,您可以看到我已经手动安装了它,但仍然收到此错误消息。任何人都知道出了什么问题以及为什么我无法安装烧瓶 Could not find a version that satisfies the requirement Jinja2>=2.10 (from flask) (from versions: 2.7.3, 2.8)No matching distribution found for Jinja2>=2.10 (from flask)完整安装消息pip install flaskLooking in indexes: http://pyats-pypi.cisco.com/simpleCollecting flask Downloading https://files.pythonhosted.org/packages/7f/e7/08578774ed4536d3242b14dacb4696386634607af824ea997202cd0edb4b/Flask-1.0.2-py2.py3-none-any.whl (91kB) 100% |\u2588\u2588\u2588\u2588\u2588\u2588\u2588\u2588\u2588\u2588\u2588\u2588\u2588\u2588\u2588\u2588\u2588\u2588\u2588\u2588\u2588\u2588\u2588\u2588\u2588\u2588\u2588\u2588\u2588\u2588\u2588\u2588| 92kB 9.3MB/s Collecting Werkzeug>=0.14 (from flask) Downloading https://files.pythonhosted.org/packages/20/c4/12e3e56473e52375aa29c4764e70d1b8f3efa6682bef8d0aae04fe335243/Werkzeug-0.14.1-py2.py3-none-any.whl (322kB) 100% |\u2588\u2588\u2588\u2588\u2588\u2588\u2588\u2588\u2588\u2588\u2588\u2588\u2588\u2588\u2588\u2588\u2588\u2588\u2588\u2588\u2588\u2588\u2588\u2588\u2588\u2588\u2588\u2588\u2588\u2588\u2588\u2588| 327kB 12.5MB/s Collecting Jinja2>=2.10 (from flask) Could not find a version that satisfies the requirement Jinja2>=2.10 (from flask) (from versions: 2.7.3, 2.8)No matching distribution found for Jinja2>=2.10 (from flask)错误似乎与 Jinja2 相关,但是我已经安装了它,所以我很困惑。pip list | grep Jinja2Jinja2 2.8
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