无法导入 'keystoneauth1' ... 尽管已安装？

Question

我在 MacOs 上通过 brew 使用python3。

当我做的时候

> python3 -c "import keystoneauth1"

我得到：

Traceback (most recent call last):
  File "<string>", line 1, in <module>
ModuleNotFoundError: No module named 'keystoneauth1'

但是然后：

> pip3 install keystoneauth1
Requirement already satisfied: keystoneauth1 in /usr/local/lib/python3.7/site-packages (3.9.0)
Requirement already satisfied: iso8601>=0.1.11 in /usr/local/lib/python3.7/site-packages (from keystoneauth1) (0.1.12)
Requirement already satisfied: os-service-types>=1.2.0 in /usr/local/lib/python3.7/site-packages (from keystoneauth1) (1.2.0)
Requirement already satisfied: stevedore>=1.20.0 in /usr/local/lib/python3.7/site-packages (from keystoneauth1) (1.28.0)
Requirement already satisfied: pbr!=2.1.0,>=2.0.0 in /usr/local/lib/python3.7/site-packages (from keystoneauth1) (4.1.0)
Requirement already satisfied: six>=1.10.0 in /usr/local/lib/python3.7/site-packages (from keystoneauth1) (1.11.0)
Requirement already satisfied: requests>=2.14.2 in /usr/local/lib/python3.7/site-packages (from keystoneauth1) (2.19.1)
Requirement already satisfied: idna<2.8,>=2.5 in /usr/local/lib/python3.7/site-packages (from requests>=2.14.2->keystoneauth1) (2.7)
Requirement already satisfied: certifi>=2017.4.17 in /usr/local/lib/python3.7/site-packages (from requests>=2.14.2->keystoneauth1) (2018.4.16)
Requirement already satisfied: urllib3<1.24,>=1.21.1 in /usr/local/lib/python3.7/site-packages (from requests>=2.14.2->keystoneauth1) (1.23)
Requirement already satisfied: chardet<3.1.0,>=3.0.2 in /usr/local/lib/python3.7/site-packages (from requests>=2.14.2->keystoneauth1) (3.0.4)

那里没有其他内容。当我随后验证安装时，一切看起来不错：

> pip3 show keystoneauth1
Name: keystoneauth1
Version: 3.9.0
Summary: Authentication Library for OpenStack Identity
Home-page: https://docs.openstack.org/keystoneauth/latest/
Author: OpenStack
Author-email: openstack-dev@lists.openstack.org
License: UNKNOWN
Location: /usr/local/lib/python3.7/site-packages
Requires: stevedore, requests, pbr, os-service-types, six, iso8601
Required-by: openstacksdk, keystoneauth

但是如图所示，已经导入该模块不起作用。

对我来说，问题是在将 brew python 升级到最新版本 3.7.6 后出现的。

我明确升级了 brew 和 pip3，但没有成功。

对于重复出现的错别字，我们深表歉意。模块名真的是keystoneauth1.

Answer 1

我真的不明白这里到底发生了什么。

所以这并不是真正解释和解决问题的答案，但 对我有效 的解决方法：

首先，我强行删除了pythonbrew uninstall --ignore-dependencies python
然后，我只安装了一遍brew install python

然后，我的脚本（最终使用了那个导入）再次运行没有任何问题？！

无法导入 'keystoneauth1' ... 尽管已安装？

Failed to import 'keystoneauth1' ... albeit installed?

python

macos

homebrew

pip

python-3.x