https://www.python.org/dev/peps/pep-0008/

A few hints:
    + About Spaces:
        - always after a comma
        - never after [, (, {
        - never before ], ), }
        - always around -, +, *, **, %, ==, >=, <=
        - always around = for an assignation
        - never around = for a default value of an argument
        - never at the end of a line
    + One statement by line:
        - nothing after : unless inside []
        - no ;
    + No useless (), like in a simple if or assert
    + Indentation uses four spaces
    + Blanklines:
        - 2 before class or function declaration
        - 1 before class method declaration
        - never more than 2
    + Line length:
        - We said 79. This is far from beeign respected. Maybe 119 is more reasonable
    + Align:
        - at the begining of a line continuation
        - not multiple spaces before = to align multiple assignements

Of course, in our case, it would be tricky to follow some other rules, like:
    N802 function name should be lowercase
    N803 argument name should be lowercase
    N806 variable in function should be lowercase

Other issues may be addressed:
    F401 '<something>' imported but unused
    F403 'from <some_lib> import *' used; unable to detect undefined names

To check all of this:
    flake8 --ignore=N802,N803,N806 --max-line-length=119 <root_folder>

Other things changed:
    - import order (thanks isort)
    - useless elif changed to if
    - useless else removed
    - usage of ValueError, when an argument does not fit the expected type / size
    - issubclass(x.__class__, X) / x.__class__ == X → isinstance(x, X)
    - isinstance accepts a list or a tuple of classes (eg: isinstance(x, (int, float)))
    - print "" → print

Recreate resource retriever behaviour by specifying the ROS_PACKAGE_PATH as environment variable.

[C++][Geom Parser] put default value to empty vector of string for user hint directories. If user's hints and ROS_PACKAGE_PATH empty, then throw error. The function that parse ROS_PACKAGE_PATH doesn't throw errors anymore

[C++][Geom parser] Removed boolean root_joint_added while parsing. Geom parser modified consequently to look for parent of link in pinocchio model  now instead of urdf::tree parent joint.

[C++][Pyhton][Geom parser] ROS_PACKAGE_PATHS directories are now added to the ones specified by user

[Python] Update methods and RobotWrapper to use buildGeom instead of buildModelAndGeom and to use a list of package dirs instead of one meshRootDir.If no package_dirs is given by the user, then it will call the C++ procedure that automatically parse the ROS_PACKAGE_PATH

[Python] Added method to convert a python List of string to a C++ vector of string. Warning: the type checking must be made by user before using this function

[C++][Python][Parser Geom] Parse automatically the ROS_PACKAGE_PATH environment variable if not clue is given by the user to where to search for meshes. Change the meshRootDir argument to a vector of strings (package directories). Updated Python consequently

Improve doc of Model+Data and add python bindings in Travis

Add CCRBA algorithm

Add ABA algorithm

Inertia.From{Ellipsoid,Cylinder,Box}

Rework center of mass algo + Python API

Use the name for all the algo related to centerOfMass computations. All
of them now return the center of mass position of the whole rigid body
system. Add also to compute only the position and velocity of the CoM