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Pip is not found after creating new python virtual environment

I'm trying to create new Python virtual environment, but I have problems with pip.
I want my virtual environment to run on Python 3.10, but my default system Python version is 3.9.5. So I downloaded Python 3.10 with
sudo apt-get install python3.10
and then i run
python3 -m virtualenv venv --python=python3.10
to create virtual environment.
The problem is, when I try to use pip I get an error:
Traceback (most recent call last):
File "/home/<my user name>/venv/bin/pip", line 5, in <module>
from pip._internal.cli.main import main
ModuleNotFoundError: No module named 'pip'
I tried running
python -m ensurepip --upgrade
but got an error:
/home/pablo/venv/bin/python: No module named ensurepip
Also running whereis pip shows, that there are some pips in the virtual environment.
pip: /usr/bin/pip /home/<my user name>/venv/bin/pip3.10 /home/<my user name>/venv/bin/pip /usr/share/man/man1/pip.1.gz
Also, when I create virtual environments with my default python interpreter, everything works perfectly fine.

I would recommend using pyenv with pyenv-virtualenv. In my experience it's just too much work to go manual. Sorry I know this is not a true answer, but having wasted hours and hours on similar issues, I feel like sharing )

your installed binary executable is named as pip3.10(/usr/bin/pip /home//venv/bin/pip3.10). So you should use the same name to call it, just pip wouldn't work. Have you tried that?

Wrong version of Python linked

So I deleted python3.6 from Windows 10, and now whenever I try to 'pip install' something I get this following error:
"Fatal error in launcher: Unable to create process using '"d:\program files (x86)\python36-32\python.exe" "D:\Program Files (x86)\Python36-32\Scripts\pip.exe" install tensorflow': The system cannot find the file specified."
I know the work around is just to python -m pip install <...> instead which defaults to the python version I am currently running, but I am wondering how to address the root cause of the issue.

Python not installing packages with pip

I've had a look around, and cannot find an answer to my problem.
All I try to run is
pip3 install -r requirements.txt
but in just about everything I run, I get "invalid syntax" or
Traceback (most recent call last): File "", line 1, in
NameError: name 'python' is not defined
All I am trying to do is install a set of packages from a text file in a folder on my desktop.
This is stressing me, as nothing seems to work.
Id appreciate any help!

Did you by any chance type python in before running that?, if you did then it's throwing that traceback call because it thinks python is a variable, not a command
Also, did you already try installing the package directly from the source?
Most can be run as pip3.x install package where package is the name of what you want to install (e.g Pygame).
I would open a new command shell, terminate processes on current, and run
python -v to know the exact version you have installed. Then pip2.x or pip3.x (where x is version of 2 or 3) install package directly online.

Does the pip option "--force-reinstall" recompiles a module? (I'm trying to reinstall cx_Oracle)

My setup has:
- oracle-instantclient (downgraded from 12 to 11)
- Virtual Environment with Python + Django + cx_Oracle
When I downgraded the oracle-instantclient, I tried to reinstall cx_oracle using:
pip install --upgrade --force-reinstall cx_Oracle
The problem is that cx_Oracle keeps complaining that I'm not using the previous installed version 12:
$ python -c "import cx_Oracle"
Traceback (most recent call last):
File "<string>", line 1, in <module>
ImportError: libclntsh.so.12.1: cannot open shared object file: No such file or directory
So, some questions here: "--force-reinstall" is not supposed to make a full reinstall, including a module recompile (aka cx_Oracle)? Somebody has some suggestion about how to workaround this issue? I looked at the pip manual and just tells me that it reinstalls the package. Not very useful.
Update1:
I tried to follow the solution here, adding my cx_Oracle path to the LD_LIBRARY_PATH but it's still not working.
echo $LD_LIBRARY_PATH
/usr/lib/oracle/11.2/client64/lib:/home/myuser/myuserenv/lib/python3.5/site-packages/cx_Oracle-5.2.1.dist-info
Note that my root user has a different python while my virtualenv uses its own python installation.
[root#myserver]# which python
/usr/bin/python
From my virtual environment:
(myvirtualenv) [myuser#myserver]$ which python
~/myvirtualenv/bin/python
Is there some way of installing cx_Oracle manually using my root user but putting the files at the virtual environment somehow?
Update2:
I tried to download cx_Oracle and compile manually using the following command:
sudo -u myuser ~/myvirtualenv/bin/python setup.py build install
But now I'm seeing some permission errors:
(...)
error: could not create 'build/bdist.linux-x86_64/egg': Permission denied
Am I doing the right thing? I don't want to mess this environment. Thanks.

The answer to your question (although you seem to have had another problem) is as follows:
It depends on the module's structure. If its setup script calls the compiler, then yes it does. Because, you see, pip modules by default do not include compiled parts, it's up to the module author to provide them.

I could finally install. The problem is that I had to use the python of my virtualenv. A simple solution but that I completely missed.
Steps:
pip download cx_Oracle
tar -xvf cx_Oracle-5.2.1.tar.gz
~/myenv/bin/python setup.py -v build
sudo ~/myenv/bin/python setup.py install
Note that I had to use sudo in the last step. Without this I was having this permission error:
error: could not create 'build/bdist.linux-x86_64/egg': Permission denied

Installing Twitter Python Module

I am trying to install Twitter-Python and I am just not getting it. According to everything I've read this should be easy. I have read all that stuff about easy_install, python setup.py install, command lines, etc, but I just don't get it. I downloaded the "twitter-1.9.4.tar.gz", so I now have the 'twitter-1.9.4' folder in my root 'C:\Python27' and tried running
>>> python setup.py install
in IDLE... and that's not working. I was able to install a module for yahoo finance and all I had to do was put the code in my 'C:\Python27\Lib' folder.
How are these different and is there a REALLY BASIC step-by-step for installing packages?

1) Run CMD as administrator
2) Type this:
set path=%path%;C:\Python27\
3) Download python-twitter, if you haven't already did, this is the link I recommend:
https://code.google.com/p/python-twitter/
4) Download PeaZip in order to extract it:
http://peazip.org/
5) Install PeaZip, go to where you have downloaded python-twitter, right click, extract it with PeaZip.
6) Copy the link to the python-twitter folder after extraction, which should be something like this:
C:\Users\KiDo\Downloads\python-twitter-1.1.tar\dist\python-twitter-1.1
7) Go back to CMD, and type:
cd python-twitter location, or something like this:
cd C:\Users\KiDo\Downloads\python-twitter-1.1.tar\dist\python-twitter-1.1
8) Now type this in CMD:
python setup.py install
And it should work fine, to confirm it open IDLE, and type:
import twitter
Now you MAY get another error, like this:
>>> import twitter
Traceback (most recent call last):
File "<stdin>", line 1, in <module>
File "C:\Python27\lib\site-packages\twitter.py", line 37, in <module>
import requests
ImportError: No module named requests
Then you have to do kinda same steps in order to download the module requests.

Looking at the directory structure you have, I am assuming that you are using Windows. So my recommendation is to use a package manager system such as pip. pip allows you to install python packages very easily.
You can install pip here:
pip for python
Or if you want the windows specific version, there are some pre built windows binaries here:
pip for windows
Doing python setup.py install in IDLE will not work because that is an interactive python interpreter. You would want to call python from the command line to install.
with pip, you can go to the command line and run something like this:
"pip install twitter-python"
Not all python packages are found with pip but you can search using
"pip search twitter-python"
The nature of pip is that you have to type out the exact name of the module that you want.
So in a nutshell, my personal recommendation to get python packages installed is:
Install pip executable
Go to the command line
Type "pip search python_package"
Find the package you want from the list.
Type "pip install python_package"
This should install everything without a hitch.

Installing Python Modules clearly states you need to install the packages from command line, not the Python interpreter IDE (like IDLE):
For Windows, this command should be run from a command prompt window
(Start ‣ Accessories):
setup.py install
You mention the python setup.py install command, which intends calling python interpreter already and wouldn't make sense to run within interpreter.

You need to set the Windows system path variables to include c:\Python27 and C:\Python27\Scripts.
You do not need to set PYTHONPATH nor use any bat files.
Path c:\Python27 will tell Windows where python.exe is
Path c:\Python27\Scripts will tell Windows where pip is
Run pip from Windows command line (do not use Idle)

Basically, with python3.4.3, you just have to do two things to be able to use twitter:
1.python -m pip install -U pip
then once pip is updated (as it comes preinstalled). you do the second step:
2. pip install twitter
this will install twitter package.

Today, after using pre method, I could not use it again (as per my post yesterday). So I tried another way that's simple and cool and hope would work always (on my pc at least):
...Python34>cd scripts #command prompt change die where pip is
...Python34\Scripts>pip install fabric #in this dir, use pip
Awesome (for me at least) although the package I wanted could not be 'perfectly' installed, yet another pythovery.