使用 python.exe 执行时，导入包在 venv 中不起作用

如何解决使用 python.exe 执行时，导入包在 venv 中不起作用

我正在虚拟环境中安装带有 whl 的软件包 pip。

PS C:\Users\Project> .\venv37\Scripts\activate
(venv37) PS C:\Users\Project> pip install .\vtk-9.0.1-cp37-cp37m-win_amd64.whl
Processing c:\users\project\vtk-9.0.1-cp37-cp37m-win_amd64.whl
Installing collected packages: vtk
Successfully installed vtk-9.0.1

并导入作品。

(venv37) PS C:\Users\Project> python
Python 3.7.4 (default,Aug  9 2019,18:34:13) [MSC v.1915 64 bit (AMD64)] :: Anaconda,Inc. on win32

Warning:
This Python interpreter is in a conda environment,but the environment has
not been activated.  Libraries may fail to load.  To activate this environment
please see https://conda.io/activation

Type "help","copyright","credits" or "license" for more information.
>>> import vtk
>>> exit()
(venv37) PS C:\Users\Project> deactivate     

现在我尝试从 venv 中的 Python 解释器执行它。

PS C:\Users\Project> .\venv37\Scripts\activate         
(venv37) PS C:\Users\Project> .\venv37\Scripts\python.exe                                    
Python 3.7.8 (tags/v3.7.8:4b47a5b6ba,Jun 28 2020,08:53:46) [MSC v.1916 64 bit (AMD64)] on win32
Type "help","credits" or "license" for more information.
>>> import vtk
Traceback (most recent call last):
  File "<stdin>",line 1,in <module>
ModuleNotFoundError: No module named 'vtk'
>>>     

而且它不起作用。我的错误是什么？