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Python modules not found even though installed

Python Version: 3.2.3
I've spent hours working on this issue and I'm still scratching my head furiously out of confusion. I'm testing an application built with python in a windows 7 device. I went and installed python and its dependencies. I also installed pip and the following packages: mysql-connector, and mysqlclient. However, when I tried running the script that imports mysql.connector, the debugger returns:
import mysql.connector
ImportError: No module named mysql.connector
I went and check the list of packages via pip list and saw that the packages we're definitely installed. They are listed as:
mysql-connector-python 8.0.26
mysqlclient 2.0.3
So, I compared this with my windows 10 device that has the script running without issues and saw that the packages were also installed the same way. I thought there were no issues in the package installation.
However, when I checked the python modules in help("modules"), I found something. The mysql and pip are not listed in the windows 7 device whereas, in my personal device, they were there.
I tried uninstalling and reinstalling the packages, yet the issue remains. For some reason, python is not able to detect the packages. I also tried to upgrade the pip via python -m pip install --upgrade pip and as expected, the python can't find the pip. I'm honestly confused at this point. Am I missing something?
UPDATE
It might be worth noting that, since my python version has no pip, I had to install it and copy its path to the system environment variables manually. Could it be connected the source of issue?

Python3 module not found error after installation with pip3

I have been stuck on a module not found error of python3.
I have a VM on Microsoft Azure, a Centos 7. Then I installed python3 and pip3, and some packages I needed. But there’s one package that I just couldn’t find after I installed it
sudo pip3 install --user stockstats
But whenever i wanted to run a python script using this package, there’s
ModuleNotFoundError: No module named 'stockstats'
What I tried:
pip3 show stockstats
As I really want to see where it was installed. It shows nothing. What it is supposed to do is like this:
Name: openpyxl
Version: 3.0.7
Summary: A Python library to read/write Excel 2010 xlsx/xlsm files
Home-page: https://openpyxl.readthedocs.io
Author: See AUTHORS
Author-email: charlie.clark#clark-consulting.eu
License: MIT
Location: /usr/local/lib/python3.6/site-packages
…
Then I guess it might be something wrong with the installed path, so I uninstalled the package, and then did
sudo pip3 install stockstats --install-option="--prefix=/usr/local/lib"
(I am just guessing if openpyxl is installed there then stockstats should be there too, as python imported openpyxl successfully)
That didn’t work as well, the error still persists.
*I didn’t use any package manager other than pip3.
** some irregularities occurred when I was trying to use python3(see this post). It was resolved, but I am not sure if the error in this post is related to that.
Any help or hint would be appreciated ;)

Thanks all for the prompt reply.
After Guo Lei’s comment, I tried downloading the tar ball for this package and installing it myself without pip, which eventually told me what exactly happened: a module named int-date, required by stockstats, was not installed in the python library directory. After I installed it in the proper directory, the issue is resolved.
As Danila Vershinin and phd had pointed out, I really shouldn’t run pip as root, and that is the source of issue(curiously, however, that only one particular module required by stockstats is installed in /root/.local/lib/. All others are in the right place, maybe I added the prefix flag without remembering it...?)
Still, I am not sure, I ran pip using sudo because I received permission denied errors repeatedly — so should I use something like sudo --user? Or sth else?

This works for me.
pip install -i https://pypi.tuna.tsinghua.edu.cn/simple stockstats
or
pip config set global.index-url https://pypi.tuna.tsinghua.edu.cn/simple
pip install stockstats

You can visit This website for Installing pip in centos 7 Pip Install In Centos 7
for maybe some errors in installing pip.
reinstall python.
check that the module name is correctly typed
install stockstats in pip like "pip install stockstats" (getten from pypi.com)

How to get rid of pygame 2.0.0.dev6?

i just installed python on my mac and i had also installed VS code with it. Later i tried installing pygame but it didn't work so i found another version that installed the version that is not stable, or pygame2.0.0.dev6 - i think that is have you type it. So that went succesfull, but after i found out why i was not being able to install the stable version, so now i want to get rid of pygame2.0.0.dev6 and install the stable version because in my VS code editor it keeps saying that it is using pygame2.0.0.dev6 even when i have the stable version installed.
Please all i want is to uninstall pygame2.0.0.dev6. I tried going to the documentation and i tried uninstalling from the terminal itself but i still cannot uninstall it. Help would me much appreciated. Thank you!

pip3 uninstall pygame==2.0.0.dev6
Windows users should use pip instead of pip3
Always use virtual environments. This version problem will be mitigated.

pip freeze doesn't show anything in Windows installation?

I have Python27 installed in Windows 7
I am trying to build a reddit bot using this tutorial
I found instructions on how to install pip for windows from here
The page says that after installing pip, I can use pip freeze to check if the installation went correctly
It says pip freeze should display some information as shown below
Microsoft Windows [Version 6.2.9200] (c) 2012 Microsoft Corporation.
All rights reserved.
C:\Users\Username>cd c:\Python27\Scripts
c:\Python27\Scripts>pip freeze
antiorm==1.1.1
enum34==1.0
requests==2.3.0 virtualenv==1.11.6
However pip freeze doesn't show me anything at all
Did pip install correctly, or is there any problem? Is there any other way i can test proper installation?

If you want to test it thoroughly, you can use your actual pip installation to install something. For example, numpy would be a good sized example that can rule many problems out.
> pip install numpy
Now, run pip freeze again to check if pip is working as expected. It should then have something to show.
If you want to test it even further, you can open a terminal and
> python
> import numpy
That should be the complete test of your pip installation.
Additionally, whenever I install a new tool in my stack, I like to validate its path with where <executable name> (on Windows) and which <executable name> (on Linux). There are some compilers like Java that are always conflicting with other installations (like crazy, to the point that a complex setup may sometimes have to inject an absolute path to enforce the use of the correct version).
Also, asking the executable for its version can rule many other problems out. In your case, you can use pip --version to check which version you got and compare it to the stable or latest, according to what you want to use.

windows is a confusing piece of software if your coming from a Linux background... the solution that worked for me is the following
pip list

The problem you are facing is that if you only have de default packages in your installation lets say pip, wheel, pip freeze does not have anything to freeze at the moment so that's why dont show anything. try to install a new package then run the command again.

Error installing package with pip

I'm trying to install a charting tool (matplotlib-v1.4.2) for python 3.4 in Windows 7, so far all my trails doesn't seem to do the job.
Attempts:
I've downloaded pip from GitHub
python -m pip install matplotlib on Command Prompt[DOS] - No Use
There's a similar question posted here, tried these suggestions too but I get the following error
'$' is not reconginized as an internal or external command.
I'm sure I'm missing something, your step by step guidance on this regard would be much appreciated.

The $ refers to the beginning of a shell prompt, you shouldn't actually include it in your command :)
So rather than (from the example question you posted)
$ pip install requests
you actually type
pip install requests
In any case, you can download matplotlib .exe files from here for use in Windows. Make sure you get the correct bitness (32bit vs 64bit) and the correct Python version.

$ in the example signifies the linux prompt, which in windows is usually >
You can install the library by either using pip install, or using this link http://matplotlib.org/downloads.html
Additionally, most python packages for windows can be easily installed by using the installers from this site http://www.lfd.uci.edu/~gohlke/pythonlibs/