Prep Python Project

Here is how I prepare python projects.

Assuming Python3 is already installed

I uses python3 installed by default via OS package. or brew python3 (But if I have a chance to use conda and the others, I may try)

Create python3 virtual environment

I uses venv module

Create venv
```
python3 -m venv venv
```
Activate venv
```
source venv/bin/activate
```
Here you have Isolated environment you can experiment, not affecting entire OS.

Install pip and pip-tools

Upgrade pip to latest version
```
pip install --upgrade pip
```
Install pip-tools for dependencies management
```
pip install pip-tools
```
for more information about pip-tools see https://pypi.org/project/pip-tools/

Installing libraries

Create requirements.in file.
```
django>=2.2,<3.0
```
Run pip-compile
```
pip-compile
```

You can check cat requirements.txt

#
# This file is autogenerated by pip-compile with python 3.10
# To update, run:
#
#    pip-compile
#
django==2.2.28
    # via -r requirements.in
pytz==2022.1
    # via django
sqlparse==0.4.2
    # via django

Install libraries using pip install
```
pip install -r requirements.txt
```

You can check installed libraries by pip list

Package    Version
---------- -------
build      0.8.0
click      8.1.3
Django     2.2.28
packaging  21.3
pep517     0.13.0
pip        22.2.2
pip-tools  6.8.0
pyparsing  3.0.9
pytz       2022.1
setuptools 59.6.0
sqlparse   0.4.2
tomli      2.0.1
wheel      0.37.1