Types:
Int, float, long
Str https://metanit.com/python/tutorial/4.5.php
list, tuple
Set, dict
FrosenSet
https://metanit.com/python/tutorial/3.1.php



###################
>>> a = 0.1

>>> b = 0.2

>>> c = a + b

>>> c == 0.3

False

>>> c

0.30000000000000004





_________________________

FILES / OS

Binary Files / Pickle / Shelve
https://metanit.com/python/tutorial/3.1.php

https://metanit.com/python/tutorial/4.5.php


_________________________


Decimal
https://metanit.com/python/tutorial/6.4.php

Fraction
https://pythonworld.ru/moduli/modul-fractions.html





_____________________________________________________________ BASH

https://www.pluralsight.com/blog/it-ops/linux-commands-for-beginners
https://dev.to/awwsmm/101-bash-commands-and-tips-for-beginners-to-experts-30je

pwd / ls / cd
- cd
    cd ~
    cd ..
    cd /
- ls
    ls -l
    ls -la
- whoami

- touch
- mkdir
    mkdir -p
- ln
- rm
    - rm -rf
- cat
- head
- tail
    tail -f