Python

Links

• Homepage
• w3schools
• https://www.tutorialspoint.com/python
• Beginners guide

HOWTO

virtual environment (venv)

Create virtual environment

mkdir myproject
cd myproject
python -m venv venv
source venv/bin/activate

and then you can

pip install whatever

Leave venv

deactivate

Listen on http

Python http server

python3 -m http.server 8080

Leave virtual environment

deactivate

Link python to python3 on Ubuntu

update-alternatives --install /usr/bin/python python /usr/bin/python3 1

Regex

• Python Regex

Strings

Length of string

len(s)

Regular expressions

https://docs.python.org/3/library/re.html

FAQ

Leave virtualenv

deactivate

Python shebang

#!/usr/bin/env python3

-bash: python: command not found

Try

update-alternatives --config python

update-alternatives: error: no alternatives for python

update-alternatives --install /usr/bin/python python $(which python3) 1