ModuleNotFoundError：python 3.9 中没有名为“scipy”的模块

Question

我在 ubuntu 18.04 上运行 python3.9。我已经继续运行命令sudo apt-get install python-scipy 并收到消息：

Reading package lists... Done
Building dependency tree       
Reading state information... Done
python-scipy is already the newest version (0.19.1-2ubuntu1).
The following packages were automatically installed and are no longer required:
  linux-hwe-5.4-headers-5.4.0-42 linux-hwe-5.4-headers-5.4.0-53
  linux-hwe-5.4-headers-5.4.0-56 linux-hwe-5.4-headers-5.4.0-58
  linux-hwe-5.4-headers-5.4.0-59 linux-hwe-5.4-headers-5.4.0-60
Use 'sudo apt autoremove' to remove them.
0 upgraded, 0 newly installed, 0 to remove and 12 not upgraded.

然而，当我尝试运行使用 from scipy import integrate 的 python3.9 代码时，我得到了错误：

ModuleNotFoundError: No module named 'scipy'

我已经阅读了这个 post 并尝试使用卸载和安装 scipy

sudo apt-get install python3-scipy

但这不起作用。有什么建议吗？

编辑 1：我尝试了sudo pip3 install scipy，它产生了消息：

The directory '/home/nick/.cache/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 '/home/nick/.cache/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.

然而，当我再次尝试运行代码时，我仍然得到相同的ImportError。

Answer 1

使用 pipwin

pip install pipwin

下载后

pipwin install scipy

Answer 2

试试 pip3 install scipy, 如果返回一个ERRNO 13: access denied，那么试试pip3 install scipy --user

Answer 3

不妨试试

python3.9 -m pip install scipy --user

会使用python3.9的pip将包安装到没有sudo权限的地方