Naming
------

A variable name should be **expressive** and searchable. 
As a result, single letter names should generally be proscribed. 
Plural usually designates for a collection. 
Name length is not a burden thanks to autocompletion. 
Functions perform a task which usually means that their name contains a verb. 

The style convention is:

+ ``lower_case`` with separating underscores for variables, functions and modules
+ ``is_something`` or ``has_something`` for booleans
+ ``UPPER_CASE`` with separating underscores for constants
+ ``CamelCase`` for classes
+ ``_`` for an unused returned value 
+ ``_leading_underscore`` for a parameter or function considered as private