The module installed via PIP is not imported. What's the matter?

Question

Python

Hello! This problem is driving me crazy. I spent a lot of time looking for a solution - without results.
I decided to write my module in Python. Here's what I did:
1. Created a description of the distribution
, I created three files in the module directory:

1. vsearch.py
   
2. setup.py
   
3. README.txt
   

All files are absolutely valid. There are no errors in them.
2. I created a distribution file
in the directory with the module files, I entered the command:
python setup.py sdist
The dist folder appeared in the directory with the module files (it contains the distribution kit that was generated by the command
above)
3. Installed the distribution kit
, I enter the command in the dist folder:
python -m pip install vsearch-1.0.tar.gz
Everything goes fine. There are no errors. It says everything was installed successfully.
Here I am in rose-colored glasses, happy to import the module into the project. And it begins ... After trying to import the module, errors are pouring in:

Traceback (most recent call last):
  File "<stdin>", line 1, in <module>
ModuleNotFoundError: No module named 'vsearch'

I import like this:
import vsearch
I called pip list and pip freeze. The vsearch module is there. But for some reason it is not imported. What is the matter is a mystery.
Thanks in advance to everyone who helps!

Answer 1

wrong module

Answer 2

Perhaps the versions of the interpreter and pip do not match. If several python distributions are installed, then there can be several pip: pip, pip3, pip3.7, etc.