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Cannot use the package "openexr" in python within Blender

I've installed the "openexr" package within my windows system. To do this, i used powershell from my blender installation folder "C:\Program Files\Blender Foundation\Blender 3.0\3.0\python" to launch the command ".\bin\python.exe -m ensurepip", for installing pip, and then "pip install openexer" to install the package.
Everything seems fine, but when I open blender and start to code with a simple
import openexr
I obtain this error:
Traceback (most recent call last):
File "\Text", line 1, in <module>
ModuleNotFoundError: No module named 'openexr'
Error: Python script failed, check the message in the system console
The module seems installed, but it's like blender cannot access it. Someone can help me? I would be extremely happy if this could work !
At the moment I tried to re-install pip or the openexr package, but the problem persist.
Also, if I try to re-install openexr, the system answer me that the package is already installed.

I have uploaded a Python package in pip, then pip installed this package, but I can't import this package in Python Interpreter

I have just uploaded a Python package into pip called hqc:
https://pypi.org/project/hqc/0.0.1/
then successfully pip installed the package using:
pip install hqc
but I can't seem to import the package in Python Interpreter. When I do this, I get the following error message:
>>> import hqc
Traceback (most recent call last):
File "<pyshell#0>", line 1, in <module>
import hqc
ModuleNotFoundError: No module named 'hqc'
What am I missing? Do I need to set the environment variable PATH or is it something else?

In the folder where setup.py is, make a folder called hqc and put an empty file called __init__.py (thats two underscores on each side). Right now, there's no file to import so python fails when importing it.
hqc-0.0.1:
hqc:
You can test the package by going to the directory where setup.py is and running
pip install .
Before trying again, be sure to uninstall
pip uninstall hqc

I had a quick look at your github repository and found that the package name, i.e. your folder name is skltemplate.
So, your import will be: (verified it to be working)
import skltemplate
And found that skltemplate package exposes the following modeules:
TemplateClassifier, TemplateTransformer and TemplateEstimator.
You can import the above by doing:
from skltemplate import TemplateClassifier
Now, if you want your package to be named as hqc, you need to rename skltemplate directory to hqc AND run the setup.py again. (You can refer this stackoverflow answer for more details).
Ensure that you increment the package version inside setup.py before running it.

python cannot find module that is installed on windows

I have installed the requests module
C:\Python34\Scripts\easy_install.exe requests
i got to the folder location
C:\Python34\Lib\site-packages\requests-2.13.0-py3.4.egg\requests
I have a path variable in system
C:\Python34\Lib\site-packages
yet when i run my script
C:\Users\beast\Desktop>update.py
I get the error No module named 'requests'
Traceback (most recent call last):
File "C:\Users\beast\Desktop\plex_playlist_update.py", line 17, in <module>
import requests
ModuleNotFoundError: No module named 'requests'
I tried installing using pip just in case
python -m pip install requests
Requirement already satisfied: requests in c:\python34\lib\site-packages\requests-2.13.0-py3.4.egg
I am new to python and I cant find an answer anywhere.
UPDATE:
I found a command to check my python search location.
C:\Users\beast\Desktop>python -c "import site; print(site.getsitepackages())"
['C:\\Python34', 'C:\\Python34\\lib\\site-packages']
I think it has to do with C:\Python34 vs C:\python34? How do i check or fix this?

The problem here is maybe because of the different versions of python installed.
If you are a Windows user, you can go to Path in Environment variables and remove the paths to unnecessary versions of python (if any). Modules installed for one version of python won't work in another version.

So I ended up going with python environment. Per python documentation it is the way to go anyway. The below command are run on the root folder of the python app.
py -m venv env
then
./env/Scripts/activate
I then ran my pip upgrade and everything is working. Obviously this did not fix it computer wide. just for my python app. But from documentation this is better because of version control of the whole enviroment.
This creates a "env" folder at the root which will have all the packages installed. Need to install all requirements again or use the requirements.txt file.

checking virtual environment modules

So I am following this tutorial and I am about to give up since i am working on a windows machine and I am pulling my hair out finding equivalencies.
I have a virtual environment, but when I try to run my code it dosent appear to be finding the local dependancies!!
(venv) PS C:\Users\Vince\skellys\Flask_skelly\venv> python Bartender_no_ui.py
Traceback (most recent call last): File "Bartender_no_ui.py", line 7, in <module>
import lxml
ImportError: No module named lxml
How can i check if the dependencies are there and how do i make sure my code is running from venv?? Am I just to much of a noob to be trying this tutorial anyway??
maybe relevant details- I had to use Conda rather than pip to install lxml, because pip couldnt get the dependencies of libxml2 and libxslt, but I get no module error for the other modules that I installed in the venv using pip as well

If you do
pip freeze
That should show you what modules you have installed in your virtualenv as long as you have it active.
Seeing as how you are working on windows I'd check out this site Its what I followed when I first got started.
Haven't used Conda much myself so not familiar with how it works but I'm guessing that won't install to your virtualenv. If you download lxml from here you should be able to install it into your virtualenv on windows.

its not the best solution but I figured out a hack around - I copied lxml from my c:\anaconda\pkgs folder. Code appears to be running fine. figures.

How do I install Python packages/ wxPython on Mac OSX?

I'm very new to python and any non-basic computer functions in general, but I'm having a very basic problem and I can't figure out how to fix it. Any time I download a module from the internet and try to import it in python, I get an error message. For example, I just downloaded wxPython after being instructed to do so on a tutorial program for Python I've been using, and after entering "import wx" I got:
Traceback (most recent call last):
File "<pyshell#4>", line 1, in <module>
import wx
ImportError: No module named wx
How do I fix this so that python can find modules I download?
Thanks!!
Python version 2.7.3, and I downloaded wxPython from the download link on the website. Another thing I noticed: whenever I type in python setup.py install in the Terminal, I get:
/Library/Frameworks/Python.framework/Versions/2.7/Resources/Python.app/Contents/MacOS/Python
can't open file 'setup.py': [Errno 2] No such file or directory
Which seems to be another huge problem?

There are a few things you need to do to actually debug this:
Run python and check what version you are running.
type where python and figure out if you have multiple versions of python running at once.
With pip or easy_install, read the output to check where they are installing packages. It's somewhat likely that they are installing to the system-wide Python 2.6, as opposed to the version that you want it to be installed to (Python 2.7).
If you find any packages installed in the wrong place with 3, uninstall them with pip uninstall <packagename> and then specifically reinstall them to 2.7 with easy_install-2.7 or pip-2.7 install. If you don't see the option for easy_install-2.7 or pip-2.7, you need to install distribute and run its setup.py file with the specific version of Python you are using.
Make sure you are actually in the directory when running setup.py. For example, to install distribute, you need to cd into the appropriate directory to install.
Finally, a separate note: it's far easier to install packages with easy_install or pip, as opposed to downloading them separately. You should try doing that first. Again, distribute has more info.