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Jupyter Notebook can't find Python module MDAnalysis

I'm very sorry, this question has popped up quite a few times, yet I'm still struggling. I'm using Windows 11. I've installed Anaconda Navigator, created a new environment, and installed the required module (MDAnalysis, via Anaconda Navigator). I launched Juypter Notebook from the play icon of the desired environment inside Anaconda Navigator.
Then with the code:
import sys
print(sys.executable)
#!pip install mdanalysis
import mdanalysis as md
Which returns the error:
---------------------------------------------------------------------------
ModuleNotFoundError Traceback (most recent call last)
Cell In [1], line 6
1 import sys
2 print(sys.executable)
3
4 #!pip install mdanalysis
----> 6 import mdanalysis as md
ModuleNotFoundError: No module named 'mdanalysis'
As you can see, from printing out the sys.executable and checking whether mdanalysis is installed (it is; hence I commented the pip line out), I've tried attempts mentioned elsewhere in StackOverflow with no success.
The executable is:
C:\Users\yewro\anaconda3\envs\MinesMD\python.exe
Where MinesMD is the conda environment, I (a) installed MDAnalysis from Anaconda Navigator, and (b) I launched Jupyter Notebook.
I would appreciate any help/suggestions.
EDIT
I've just tried installing MDAnalysis via conda inside Jupyter Notebook. I shouldn't need to do this as I did it within Anaconda Navigator (and with the right environment), but in for a penny, in for a pound. This is the output (matching python executable location and environment):
C:\Users\yewro\anaconda3\envs\MinesMD\python.exe
Collecting package metadata (current_repodata.json): ...working... done
Solving environment: ...working... done
# All requested packages already installed.
Retrieving notices: ...working... done

Try installing the missing package directly from the Jupyter Notebook (with pip or conda) as explained here:
https://jakevdp.github.io/blog/2017/12/05/installing-python-packages-from-jupyter/
EDIT:
We figured out that the package was correctly installed and accessible to the Jupyter Notebook environment. (See comments for this answer)
The problem is that the modules import should be different: import MDAnalysis instead of import mdanalysis.

Import CV2: DLL load failed: The specified module could not be found while successful pip installation

I was working with Python 3.7 and OpenCV 4.2 in Pycharm IDE (Windows10). The system environment variables were changed by one of my co-workers by accident (we don't know what happened exactly). Then I found that my code did not work with this error!:
Traceback (most recent call last):
File "<stdin>", line 1, in <module>
ImportError: DLL load failed: The specified module could not be found.
Then I used this command:
pip uninstall opencv-python
pip uninstall opencv-contrib-python
pip install opencv-python
All of them executed successfully, but when I write import cv2 the above error is appeared. By the way, the system knows command Python, it shows the right path to the python.exe. Moreover, commands like import numpy works correctly! How can I fix this problem?

I found the answer! There was an extra cv2.py file in site-packages/cv2 path. So, I removed it and the code worked

After installing Jupyter Notebook NumPy and TensorFlow are not working

I was using Jupyter Notebook to do some studying today and noticed that I couldn't import Tensorflow or Keras. It was strange because until yesterday it was working fine. Anyway, I looked online and some people recommended I install Jupyter again using conda install jupyter notebook. I did exactly that and now I can't even import Tensorflow or NumPy. Not to mention whenever I try to open Jupyter that doesn't work either. I see a command prompt flash briefly and then nothing happens.
When I try to import either, I get this error:
---------------------------------------------------------------------------
ModuleNotFoundError Traceback (most recent call last)
~\Anaconda3\lib\site-packages\numpy\core\__init__.py in <module>
39 try:
---> 40 from . import multiarray
41 except ImportError as exc:
~\Anaconda3\lib\site-packages\numpy\core\multiarray.py in <module>
11
---> 12 from . import overrides
13 from . import _multiarray_umath
~\Anaconda3\lib\site-packages\numpy\core\overrides.py in <module>
5
----> 6 from numpy.core._multiarray_umath import (
7 add_docstring, implement_array_function, _get_implementing_args)
ModuleNotFoundError: No module named 'numpy.core._multiarray_umath'
During handling of the above exception, another exception occurred:
ImportError Traceback (most recent call last)
<ipython-input-1-0aa0b027fcb6> in <module>
----> 1 import numpy as np
~\Anaconda3\lib\site-packages\numpy\__init__.py in <module>
140 from . import _distributor_init
141
--> 142 from . import core
143 from .core import *
144 from . import compat
~\Anaconda3\lib\site-packages\numpy\core\__init__.py in <module>
69 Original error was: %s
70 """ % (sys.executable, exc)
---> 71 raise ImportError(msg)
72 finally:
73 for envkey in env_added:
ImportError:
IMPORTANT: PLEASE READ THIS FOR ADVICE ON HOW TO SOLVE THIS ISSUE!
Importing the multiarray numpy extension module failed. Most
likely you are trying to import a failed build of numpy.
Here is how to proceed:
- If you're working with a numpy git repository, try `git clean -xdf`
(removes all files not under version control) and rebuild numpy.
- If you are simply trying to use the numpy version that you have installed:
your installation is broken - please reinstall numpy.
- If you have already reinstalled and that did not fix the problem, then:
1. Check that you are using the Python you expect (you're using
C:\Users\seant\Anaconda3\python.exe),
and that you have no directories in your PATH or PYTHONPATH that can
interfere with the Python and numpy versions you're trying to use.
2. If (1) looks fine, you can open a new issue at
https://github.com/numpy/numpy/issues. Please include details on:
- how you installed Python
- how you installed numpy
- your operating system
- whether or not you have multiple versions of Python installed
- if you built from source, your compiler versions and ideally a build log
Note: this error has many possible causes, so please don't comment on
an existing issue about this - open a new one instead.
Original error was: No module named 'numpy.core._multiarray_umath'
I tried reinstalling NumPy, but that didn't solve the issue. I installed Python and NumPy via installing Anaconda, and my operating system is Windows 10. My path variable looked normal as well and everything was working until now. Does anyone know how I can proceed to fix this issue?

Go to your terminal and locate the environment where you have Numpy and the other modules installed. If your'e using virtualenvwrapper you can run:
lsvirtualenv a list of your virtual envs you have will be displayed.
Then type workon virtualenv1 (replace with name of displayed virtual env) and check for your installed modules e.g after selecting the virtual env you can then type
python and get into the shell. Then you can do import numpy etc to check if the modules youre looking for exist in that virtualenv. When you find them you can then exit out of the shell and do a pip install jupyter to install jupyter notebooks on the virtual env with the modules you need. To avoid meeting such problems in future you should make sure you maintain virtual environments in your machine with the modules that your're interested to work with as per virtual env. Virtualenvwrapper is a great tool that abstracts away most of the common pitfalls found with working with virtual envs. More info in managing and creating virtual envs can be found here.

In my case I just spent around an hour uninstalling everything Python-related (Python, Anaconda, etc.) and completely installing everything from scratch again. It was a bit of a pain but I didn't know what else to do without having to dive too deeply into the issue.

Error Importing Python Packages into Jupyter

I've been working in Jupyter IPython notebook (using Python 2.7) and haven't had any issues before this importing and installing packages. Most of my packages were installed via Anaconda. Now I'm randomly having problems importing packages that I've always been able to import. I have an example below. Please help. I'm pretty new to Python so I'm completing stuck on what the problem is and how to fix it.
import pandas as pd
ImportError Traceback (most recent call last)
in ()
----> 1 import pandas as pd
C:\Users\IBM_ADMIN\Anaconda2\lib\site-packages\pandas__init__.py in ()
11 "pandas from the source directory, you may need to run "
12 "'python setup.py build_ext --inplace' to build the C "
---> 13 "extensions first.".format(module))
14
15 from datetime import datetime
ImportError: C extension: No module named numpy not built. If you want to import pandas from the source directory, you may need to run 'python setup.py build_ext --inplace' to build the C extensions first.

conda virtual environments will help you a lot. It's good practice to use environments for your projects. And it'll help you avoid causing potential problems with your system's Python.
Try this on the command line:
conda create -n myenv anaconda
source activate myenv
jupyter notebook
That default env will already have pandas; you can install most other things with conda install <package> or, if that doesn't work, pip install <package>.

Running this solved the problem: pip install scipy-0.16.1-cp27-none-win_amd64.whl After doing this, all other packages were able to be re-installed and successfully imported.

sklearn ImportError: No module named _check_build

I'm trying to import sklearn, however when I attempt to do so I receive the following:
---------------------------------------------------------------------------
ImportError Traceback (most recent call last)
<ipython-input-2-8fd979e02004> in <module>()
----> 1 import sklearn
C:\Users\Alpine\AppData\Local\Enthought\Canopy\User\sklearn\__init__.py in <module>()
29 # process, as it may not be compiled yet
30 else:
---> 31 from . import __check_build
32 from .base import clone
33
C:\Users\Alpine\AppData\Local\Enthought\Canopy\User\sklearn\__check_build\__init__.py in <module>()
44 from ._check_build import check_build
45 except ImportError as e:
---> 46 raise_build_error(e)
C:\Users\Alpine\AppData\Local\Enthought\Canopy\User\sklearn\__check_build\__init__.py in raise_build_error(e)
39 to build the package before using it: run `python setup.py install` or
40 `make` in the source directory.
---> 41 %s""" % (e, local_dir, ''.join(dir_content).strip(), msg))
42
43 try:
ImportError: No module named _check_build
___________________________________________________________________________
Contents of C:\Users\Alpine\AppData\Local\Enthought\Canopy\User\sklearn\__check_build:
setup.py setup.pyc _check_build.c
_check_build.pyx __init__.py __init__.pyc
___________________________________________________________________________
It seems that scikit-learn has not been built correctly.
If you have installed scikit-learn from source, please do not forget
to build the package before using it: run `python setup.py install` or
`make` in the source directory.
If you have used an installer, please check that it is suited for your
Python version, your operating system and your platform.
ERROR: An unexpected error occurred while tokenizing input
The following traceback may be corrupted or invalid
The error message is: ('EOF in multi-line string', (1, 2))
I'm fairly sure that scikit-learn has been correctly built as I managed to run python setup.py install without any incident. I did however try running python setup.py bdist_wininst -b doc/logos/scikit-learn-logo.bmp though was interrupted at error: cannot copy tree 'build\scripts.win-amd64-2.7': not a directory.
Might anybody have an idea on how to fix this?

I have the same problem on Windows 10. I installed Anaconda with Python 3.7 and this installation shipped not only this problem. To solve run in anaconda prompt:
conda install scikit-learn
At least this worked for me

OK, the following is work for me :)
sudo make
sudo python setup.py install
Finally, to test whether installation is ok:
nosetests --exe sklearn

One way to avoid this error is to make sure you have all the needed dependencies installed. Under Ubuntu / Debian, you can accomplish this by running the following:
sudo apt-get build-dep python-sklearn

This doesn't exactly fit your question as it doesn't involve Enthought distribution; however, I had a similar problem with a module using sklearn. The error was something like:
$ python -m somefile.py // somefile.py uses sklearn at some point
Cannot import name __check_build
And after I installed scikit-learn (also,scipy and numpy-MKL) from this page the problem seemed to go away.

Make sure you are executing the code with the latest python version. If you have multiple python version installed in your machine then just remove the first line "#!/usr/bin/python" and try running with full path of latest python version like "/usr/local/bin/python3.4 'filename'". If you have python version lower than 2.7 then try upgrading the version and installing the dependencies and then try the above method.

In my case I had Python installed at two places, first by myself where I independently installed python and it was in a separate folder, second time by anaconda which installs python within its own folder. So every-time I called Scikit Learn it was refereeing to the first python folder which had some issues with scikit learn but when I removed old Python folder completely jupyter notebook was refereeing to the correct python folder and hence it worked.

I am using Anaconda and this worked for me:
conda install scikit-learn