def __init__(self, list=None):
    ' A list of particle ids and names can be given to the constructor.\n        '
    self._list = []
    if (list != None):
        self._list = list
A list of particle ids and names can be given to the constructor.
def __init__(self, list=None):
    ' \n        '
    self._list = []
    if (list != None):
        self._list = list