brew install python

sudo apt update
sudo apt install python3 python3-pip

python --version
# Linux / macOS:
python3 --version

pip --version
# or
pip3 --version

code --version

# My first Python program
print("Hello, World!")
print("I am learning Python 🐍")

name = input("What is your name? ")
print(f"Nice to meet you, {name}!")

python hello.py
# Hello, World!
# I am learning Python 🐍
# What is your name? _

pip install requests    # HTTP library
pip install numpy       # numbers & arrays
pip install flask       # simple web framework

pip list                 # all installed packages
pip show requests        # info about one package
pip uninstall requests   # remove a package

pip freeze > requirements.txt    # save packages list
pip install -r requirements.txt  # restore on another machine

pwd                   # print current directory path
ls                    # list files (Linux/macOS)
dir                   # list files (Windows)
cd my-folder          # enter a folder
cd ..                 # go up one level
mkdir new-folder      # create new folder
touch hello.py        # create empty file (Linux/macOS)
echo. > hello.py      # create empty file (Windows)
rm hello.py           # delete file (Linux/macOS)
del hello.py          # delete file (Windows)
clear                 # clear the screen