Anaconda Python - how to reinstall NumPy

Question

I am using Anaconda 5.3.0's Python interpreter in Visual Studio Code. When I try to import sklearn I get an error:

Traceback (most recent call last):
  File "c:\Users\azzam\machinelearning.py", line 1, in <module>
    import sklearn
  File "C:\Anaconda3\lib\site-packages\sklearn\__init__.py", line 134, in <module>
    from .base import clone
  File "C:\Anaconda3\lib\site-packages\sklearn\base.py", line 10, in <module>
    import numpy as np
  File "C:\Anaconda3\lib\site-packages\numpy\__init__.py", line 142, in <module>
    from . import add_newdocs
  File "C:\Anaconda3\lib\site-packages\numpy\add_newdocs.py", line 13, in <module>
    from numpy.lib import add_newdoc
  File "C:\Anaconda3\lib\site-packages\numpy\lib\__init__.py", line 8, in <module>
    from .type_check import *
  File "C:\Anaconda3\lib\site-packages\numpy\lib\type_check.py", line 11, in <module>
    import numpy.core.numeric as _nx
  File "C:\Anaconda3\lib\site-packages\numpy\core\__init__.py", line 26, in <module>
    raise ImportError(msg)
ImportError:
Importing the multiarray numpy extension module failed.  Most
likely you are trying to import a failed build of numpy.
If you're working with a numpy git repo, try `git clean -xdf` (removes all
files not under version control).  Otherwise reinstall numpy.

Original error was: DLL load failed: The specified module could not be found.

It looks like that I need to "reinstall" NumPy. I searched on the web, but I didn't find a way to "reinstall". There is only how to "install", and when I use

conda install numpy

in Anaconda Prompt I get:

Solving environment: done

# All requested packages already installed.

And if I tried to remove NumPy to install it again, it will remove everything, not just NumPy. So do I really need to "reinstall" NumPy to be able to import sklearn? And if I do, how do I "reinstall" NumPy?

Answer 1

How to reinstall a package depends on the conda version.

newer versions (>= 4.6):

conda install numpy --force-reinstall

older versions (< 4.6):

conda install numpy --force

Answer 2

You will most likely have to uninstall NumPy and reinstall it.

conda remove numpy

And then install it again:

conda install -c anaconda numpy