Python
From DWIKI
Links
Strings
Length of string
len(s)
Lists
List operators
Regular expressions=
https://docs.python.org/3/library/re.html
FAQ
-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) 3
Leave virtualenv
deactivate