def __init__(self, name, date=None, fetch=True, all=False):
        self.name = name
        self.previousDate = None
        if date:
            self.date = date
            self.latest = False
        else:
            self.date = None
            self.latest = True
        self.entries = []
        if fetch:
            self.fetchEntries(all=all)
Constructs a new ChartData instance.
dataset/ETHPy150Open guoguo12/billboard-charts/billboard.py/ChartData.__init__