python - 模块未找到错误 : No module named 'scipy' in python 3. 9

Question

我在 ubuntu 18.04 上运行 python3.9。我已经继续执行命令 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.

但是，当我尝试运行使用 from scipy import integrate 的 python3.9 代码时，出现错误:

ModuleNotFoundError: No module named 'scipy'

我已经读过这个 post并尝试使用

卸载和安装 scipy

sudo apt-get install python3-scipy

但这没有用。有什么建议吗？

编辑 1:我尝试了生成消息的 sudo pip3 install scipy:

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，当我尝试再次运行代码时，我仍然得到相同的 ImportError。

Answer 1

也许试试

python3.9 -m pip install scipy --user

使用python3.9的pip将包安装到没有sudo权限的地方