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Pip upgrading arcgis completely broke pip

Overview: While running Python 3.6, after upgrading my arcgis package, scripts no longer recognizes many packages and pip itself completely broke, making it impossible to upgrade or uninstall any packages.
Background Info: Fairly recently, when I run a particular program of mine, I have been seeing a deprecation message connected to the arcgis package. So, I upgraded the arcgis package to see if it fixed it. It seemed to install correctly but then when trying to run my program, I'd get errors for other packages, like folium or requests. I then tried upgrading Python and initially, it worked. I used pip to install pandas and requests but right after I installed arcgis, everything broke again. So then when trying to uninstall arcgis (or do anything else pip related) I get this error:
FileExistsError: [WinError 183] Cannot create a file when that file already exists: 'C:\Users\myuserpath\AppData\Local\.certifi'
I've uninstalled Python but it doesn't change anything. pip install any package results in this error. I tried reverting back to Python 3.6 but the installer wasn't available from the python site, only 3.9.
What could have been changed or affected by this arcgis installation?

There seems to be two primary issues you're dealing with. The first is as #BoarGules mentioned, that arcgis does a 'full' install with all its dependencies and that could be causing problems. Secondly, the newest requests library seems to have some issues as well, at least from what I've experienced. So let's get started fixing all this.
There's probably a few different ways to fix this, so this is just one of the many. First, uninstall python and delete the python folder from your AppData folder - in your case, it would be the Python 3.9 folder. Re-install Python and check your site-packages folder making sure it only contains the default Python packages. Open up a command prompt and do a pip install of something basic, like pandas. If that goes well, then the first hurdle is over.
When it comes time to install arcgis again, you'll want to use this instead
pip install arcgis --no-deps
this will prevent the doubling up of any of the packages or whatever seems to be happening. You will need to then also install these:
pip install ujson
pip install requests_ntlm
Next, when you come to installing requests, use an older library, like this one:
pip install requests==2.20.0
That should get things back up and running.

problem installing and importing modules in python

I am installing python on windows10 and trying to install the opencv and numpy extentions in the command window. I get no error installing them and it says it is successfully installed. But when I try to check the installation and import cv2 it does not recognize it and give me the error: no module named cv2.
can anybody help me with this problem? Is there something wrong in installation process or do I need to install something else?
I checked the newest version of each and used the compatible one with my system.
Thanks.

One solution could be that you have 2 versions of python. So, go to the specific python's scripts directory and run: pip install numpy
If that too doesn't work, you can find the answers to this question on Why can't I import opencv3 even though the package is installed?, as stated by #Cut7er.
I have tried the solutions given to the above stated question myself also. But, they didn't work for me. So, another thing that you could try to use is this IDE called PyCharm. It ofcourse is much more beautiful that the IDLE, but it also has an inbuilt GUI controlled installation of binaries or packages. That would make things a lot easier. I have faced a lot of issues with packages for python and this IDE made things a lot easier. You can find it on https://www.jetbrains.com/pycharm/download/#section=windows.
You can also use anaconda. But, I found it a little difficult to use since, it has similar issues.
EDIT:
Seems like you are using PyCharm. But, you are installing libraries from your command prompt. So, see the answer to: ImportError: No module named 'bottle' - PyCharm. This answer guides you through how to install a certain library through your PyCharm window itself. So,
1) Go to Files>Settings
2) Search for "Interpreter" from the searching tab. Open the interpreter
3) You can now see a plus sign on the right. A click on it will open up a section on the left.
4) In the searching tab, search for numpy or opencv. Click on whichever module you want to install. And then click on the "install package" button on the bottom left. This will install the package for you.
5) Then click save. And run your file that says import cv/cv2.
This should probably do the trick.
Hope it helps!

Is it possible that you have 2 versions of python on your machine and your native pip is pointing to the other one? (e.g. you pip install opencv which installs opencv for python 2, but you are using python 3). If this is so, then use pip3 install opencv

I removed the Anaconda version on my machine, so I just have python 3.7 installed. I removed the python interpreter(Pycharm) and installed it again and the problem got fixed somehow!

I suspect you have two versions of python and the one you're using doesn't have opencv on it, because pip pointed to the wrong one.
A pragmatic solution assuming you're using the python version with conda is to just use conda to install cv2:
conda install -c menpo opencv
A more careful solution is to figure out how to get the pip that points to the python version you're using. On linux I can check that my pip points to my python like this:
:~$ which python
/home/kpierce/anaconda3/bin/python
:~$ which pip
/home/kpierce/anaconda3/bin/pip
So you see the pip and python versions are associated. On windows I suspect you do an analogous thing on the command line like
where python
where pip
And if they don't match, you might try
where python
where pip3
to see if those match. You need to use the pip that points to the correct python version. You can view the python version by entering the python interpreter and running
import sys
sys.version

Matplotlib installation for python 3.6. and windows 8

I do not understand exactly what I should do to install Matplotlib. I read a lot of posts but I do not have so much of fluent knowledge in programming so basically all of this that i read is quite confusing. Does anyone know what exactly should be done when having Python 3.6., visual code studio and Windows 8 to install Matplotlib?

A way that is simple using the original python from python.org with PATH installed is to use pip. You can check by opening cmd and entering python. If it is not a recognised command then you will have to reinstall python but make sure to tick the box at the start to enable PATH. once this is done you can install packages such as numpy and matplotlib.
In cmd type pip install Then the package you want to install from the PyPI website and using the EXACT name in the url before the version number. It should be like: /PACKAGE/VERSION.
eg. for matplotlib the url is /matplotlib/VERSION, so the name would be matplotlib. To install the latest version pip install matplotlib
If for some reason you want to uninstall a package you would do: pip uninstall PACKAGE. To install a specific version use pip install PACKAGE==VERSION where VERSION is the exact version name in the url. For full documentation visit Packaging Help.
Visual code studio is not necessary in this situation. This question is too broad and asking for a recommendation on software. Because of this, I went with the original python installation way and not any 3rd party software.

How to pip install forex python

I am attempting to install forex-python. I have attempted to find a meaningful answer to this question everywhere, however my search has been in vain. Now, the Python Software Foundation's instructions are to pip install it. I am currently using Python V3.6.1 and the Foundation states that versions 3.4 or greater have pip installed directly into them. I am using the executable installer of v3.6.1.
My question is this: where do you pip install this package on Windows? I attempted to install the package in the python command prompt, tagged Python 3.6(64 bit), using the statement
pip install forex-python
though it resulted in a syntax error.
Is the module supposed to be installed on the Python interpreter? Since I am using Windows Vista, what is the Windows version of a terminal? I am unaccustomed to a Windows operating system on a Toshiba computer and I am more familiar with Mac OS X. If there is a version, what is it called and how do I find it? And if it is supposed to be installed on the Python interpreter, why does it give a syntax error when I enter the statement?
When I asked for help, it stated all information about pip, however it did not state how to install forex-python.
I currently have forex-python downloaded on this computer, symbolized by the logo of three books. It is complete with the code, readmes and files, however, I do not know how to install it for usage in IDLE programs, like my currency converter.
I would be very grateful for any help on this subject.

you can try
pip install forex-python
or
pip install git+https://github.com/MicroPyramid/forex-python.git
then you can check the installation through
pip freeze
if it is listed in it then it is installed

How do you install PyCallGraph / use pip?

and thanks to anyone who gives some of their time to consider my problem.
What I need help on is for someone to give me a simple and accessible explanation on how to install that module. I have never, ever used anything from PyPi before, I have only heard of pip after looking up PyCallGraph.
I'm not a programmer first, I'm doing an accounting internship and am using python to write scripts to help me speed up some processes, at the urging of a colleague who himself uses python. I write scripts using Notepad++ and execute them through IDLE.
I'm currently working on optimizing a script I wrote and came upon PyCallGraph while checking this very site on tips on how to do so.
I tried the very minimalistic instruction of just doing "pip install pycallgraph" just about anywhere I could think of, including cmd.exe, to no avail. Runing get-pip.py directly seems to have worked for installing pip, though.
Otherwise I can always just stick with the cProfile printout and write-off using modules needing such an install, although that saddly seems to be quite a few...

Step 1: Install PIP
Open terminal (cmd.exe, PowerShell, whatever)
Download get-pip.py and place it in the working directory of your terminal
Install PIP by invoking python get-pip.py
Confirm that PIP was installed correctly by invoking command pip (should display help if success)
If pip didn't work, make sure your PATH environment variable has been set up correctly. In typical Windows installations pip is installed under c:\Python27\Scripts. Make sure this folder is included in PATH.
Step 2: Install your library with PIP
Invoke pip install pycallgraph
PIP installs the library and it can be now used from Python