'Constructor.'

def __init__(self, options=None):

    super(ChartPie, self).__init__()
    if (options is None):
        options = {}
    self.vary_data_color = 1
    self.rotation = 0
    self.label_position_default = 'best_fit'
    self.label_positions = {'center': 'ctr', 'inside_end': 'inEnd', 'outside_end': 'outEnd', 'best_fit': 'bestFit'}
