Python Error

[Barry]

Two observations.

Python.exe is not on your PATH. But that does not matter as you can use the py command instead

And nymph may not be available for python 3.9 yet. Check on pypi to see if there is a build for 3.9.

Maybe use 3.8 for the time being.
Barry

> On 24 Nov 2020, at 11:18, Mayukh Chakraborty via Python-list <python-list at python.org> wrote:
> 
>  Thanks - I am able to launch 'py' from the command prompt and it gives me the python versions installed in my machine from python.org website.
> However, when I am trying to execute a python program from command prompt, I am getting the error below. I had reinstalled python packages (numpy, pandas) but it didn't resolve the issue. Any help would be appreciated.
> Original error was: No module named 'numpy.core._multiarray_umath'
> 
> ---------------------------------------------------------------------------------------------------------------------------------------
> C:\Users\mchak\Documents\Python>py ES.pyTraceback (most recent call last):  File "C:\Users\mchak\AppData\Local\Packages\PythonSoftwareFoundation.Python.3.8_qbz5n2kfra8p0\LocalCache\local-packages\Python38\site-packages\numpy\core\__init__.py", line 22, in <module>    from . import multiarray  File "C:\Users\mchak\AppData\Local\Packages\PythonSoftwareFoundation.Python.3.8_qbz5n2kfra8p0\LocalCache\local-packages\Python38\site-packages\numpy\core\multiarray.py", line 12, in <module>    from . import overrides  File "C:\Users\mchak\AppData\Local\Packages\PythonSoftwareFoundation.Python.3.8_qbz5n2kfra8p0\LocalCache\local-packages\Python38\site-packages\numpy\core\overrides.py", line 7, in <module>    from numpy.core._multiarray_umath import (ModuleNotFoundError: No module named 'numpy.core._multiarray_umath'
> During handling of the above exception, another exception occurred:
> Traceback (most recent call last):  File "C:\Users\mchak\Documents\Python\ES.py", line 1, in <module>    import scipy as sp  File "C:\Users\mchak\AppData\Local\Packages\PythonSoftwareFoundation.Python.3.8_qbz5n2kfra8p0\LocalCache\local-packages\Python38\site-packages\scipy\__init__.py", line 61, in <module>    from numpy import show_config as show_numpy_config  File "C:\Users\mchak\AppData\Local\Packages\PythonSoftwareFoundation.Python.3.8_qbz5n2kfra8p0\LocalCache\local-packages\Python38\site-packages\numpy\__init__.py", line 140, in <module>    from . import core  File "C:\Users\mchak\AppData\Local\Packages\PythonSoftwareFoundation.Python.3.8_qbz5n2kfra8p0\LocalCache\local-packages\Python38\site-packages\numpy\core\__init__.py", line 48, in <module>    raise ImportError(msg)ImportError:
> IMPORTANT: PLEASE READ THIS FOR ADVICE ON HOW TO SOLVE THIS ISSUE!
> Importing the numpy C-extensions failed. This error can happen formany reasons, often due to issues with your setup or how NumPy wasinstalled.
> 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\mchak\AppData\Local\Programs\Python\Python39\python.exe"  * The NumPy version is: "1.19.4"
> and make sure that they are the versions you expect.Please carefully study the documentation linked above for further help.
> Original error was: No module named 'numpy.core._multiarray_umath'
> 
>>    On Tuesday, November 24, 2020, 07:13:04 AM GMT, Gisle Vanem <gisle.vanem at gmail.com> wrote:  
>> 
>> Barry Scott wrote:
>> 
>> If you have python from python.org installed you should be able to list all the version you have installed
>> with the command:
>> 
>>     py -0
> When was that '-0' feature added?
> I have Python 3.6 from Python.org and here a
> 'py.exe -0' gives:
>   Requested Python version (0) not installed
> 
> But using 'py.exe -0' from Python 3.9 correctly
> gives:
>   -3.6-32 *
>   -2.7-32
> 
> -- 
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