'MarkerStyle
Attributes
markers : list of known markes
fillstyles : list of known fillstyles
filled_markers : list of known filled markers.
Parameters
marker : string or array_like, optional, default: None
See the descriptions of possible markers in the module docstring.
fillstyle : string, optional, default: \'full\'
\'full\', \'left", \'right\', \'bottom\', \'top\', \'none\''

def __init__(self, marker=None, fillstyle=None):

    self._marker_function = None
    self.set_fillstyle(fillstyle)
    self.set_marker(marker)
