<commit_before># -*- coding: utf-8 -*-
"""
==================================================================
Abstract representation of an Atom (:mod:`sknano.chemistry._atom`)
==================================================================

.. currentmodule:: sknano.chemistry._atom

"""
from __future__ import division, absolute_import, print_function
__docformat__ = 'restructuredtext'

import numpy as np

from pkshared.tools.refdata import atomic_masses, atomic_mass_symbol_map, \
    atomic_numbers, atomic_number_symbol_map, element_symbols

__all__ = ['Atom']


class AtomAttributes(object):
    pass


class Atom(object):

    """Class for creating abstract object representing an Atom.

    Parameters
    ----------
    element : {str, int}, optional
        A string representation of the element symbol or an integer specifying
        an element atomic number.
    atomID : int, optional
        atom ID, a LAMMPS atom attribute.
    moleculeID : int, optional
        molecule ID, a LAMMPS atom attribute.
    atomtype : int, optional
        atom type, a LAMMPS atom attribute.
    q : {int, float}, optional
        Net charge of Atom.
    x, y, z : float, optional
        :math:`x, y, z` components of position.
    vx, vy, vz : float, optional
        :math:`v_x, v_y, v_z` components of velocity.
    r_units : str, optional
        Units of position components.
    v_units : str, optional
        Units of velocity components.<commit_msg>adding AtomAttributes dummpy class to __all__ list<commit_after># -*- coding: utf-8 -*-
"""
==================================================================
Abstract representation of an Atom (:mod:`sknano.chemistry._atom`)
==================================================================

.. currentmodule:: sknano.chemistry._atom

"""
from __future__ import division, absolute_import, print_function
__docformat__ = 'restructuredtext'

import numpy as np

from pkshared.tools.refdata import atomic_masses, atomic_mass_symbol_map, \
    atomic_numbers, atomic_number_symbol_map, element_symbols

__all__ = ['Atom', 'AtomAttributes']


class AtomAttributes(object):
    pass


class Atom(object):

    """Class for creating abstract object representing an Atom.

    Parameters
    ----------
    element : {str, int}, optional
        A string representation of the element symbol or an integer specifying
        an element atomic number.
    atomID : int, optional
        atom ID, a LAMMPS atom attribute.
    moleculeID : int, optional
        molecule ID, a LAMMPS atom attribute.
    atomtype : int, optional
        atom type, a LAMMPS atom attribute.
    q : {int, float}, optional
        Net charge of Atom.
    x, y, z : float, optional
        :math:`x, y, z` components of position.
    vx, vy, vz : float, optional
        :math:`v_x, v_y, v_z` components of velocity.
    r_units : str, optional
        Units of position components.
    v_units : str, optional
        Units of velocity components.
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