在 jupyter 中使用 conda env

Question

我使用 anacondaprompt 创建了一个 conda 环境 dmtenv 并在激活的 testenv 中执行了以下命令，以便能够将我的 conda 环境设置为 jupyter 内核（如this post):

conda install -c conda-forge ipykernel

python -m ipykernel install --user --name dmtenv

在此之后，可以选择内核和runs，但是当我尝试导入numpy或pandas等包时，它给出了这个错误：

---------------------------------------------------------------------------
ImportError                               Traceback (most recent call last)
~\anaconda3\envs\dmtenv\lib\site-packages\numpy\core\__init__.py in <module>
     21 try:
---> 22     from . import multiarray
     23 except ImportError as exc:

~\anaconda3\envs\dmtenv\lib\site-packages\numpy\core\multiarray.py in <module>
     11 
---> 12 from . import overrides
     13 from . import _multiarray_umath

~\anaconda3\envs\dmtenv\lib\site-packages\numpy\core\overrides.py in <module>
      6 
----> 7 from numpy.core._multiarray_umath import (
      8     add_docstring, implement_array_function, _get_implementing_args)

ImportError: DLL load failed while importing _multiarray_umath: Kan opgegeven module niet vinden.

During handling of the above exception, another exception occurred:

ImportError                               Traceback (most recent call last)
<ipython-input-7-0aa0b027fcb6> in <module>
----> 1 import numpy as np

~\anaconda3\envs\dmtenv\lib\site-packages\numpy\__init__.py in <module>
    143     from . import _distributor_init
    144 
--> 145     from . import core
    146     from .core import *
    147     from . import compat

~\anaconda3\envs\dmtenv\lib\site-packages\numpy\core\__init__.py in <module>
     46 """ % (sys.version_info[0], sys.version_info[1], sys.executable,
     47         __version__, exc)
---> 48     raise ImportError(msg)
     49 finally:
     50     for envkey in env_added:

ImportError: 

IMPORTANT: PLEASE READ THIS FOR ADVICE ON HOW TO SOLVE THIS ISSUE!

Importing the numpy C-extensions failed. This error can happen for
many reasons, often due to issues with your setup or how NumPy was
installed.

We have compiled some common reasons and troubleshooting tips at:

    https://numpy.org/devdocs/user/troubleshooting-importerror.html

Please note and check the following:

  * The Python version is: Python3.9 from "C:\Users\maxzw\anaconda3\envs\dmtenv\python.exe"
  * The NumPy version is: "1.20.1"

and make sure that they are the versions you expect.
Please carefully study the documentation linked above for further help.

Original error was: DLL load failed while importing _multiarray_umath: Cannot find module.

我运行 python 3.9.5 和 numpy 1.20.1。在基本 conda 环境中导入包确实有效！

我真的不知道该怎么办。非常感谢任何帮助！

编辑：

我也试过nb_conda，这给了我同样的问题。

Answer 1

答案：

我通过将以下路径添加到 PATH 来修复它

C:\Users\<myusername>\Anaconda3\Scripts\
C:\Users\<myusername>\Anaconda3\Library\
C:\Users\<myusername>\Anaconda3\Library\bin\
C:\Users\<myusername>\Anaconda3\Library\mingw-w64\bin\