How to use the hikyuu.indicator.indicator.Indicator function in hikyuu

def TA_CDLCLOSINGMARUBOZU(ind=None):
        imp = crtTaIndicatorImp(ta.CDLCLOSINGMARUBOZU, 'TA_CDLCLOSINGMARUBOZU', 
                                result_num = 1,
                                prices = ['open', 'high', 'low', 'close'])
        return Indicator(imp)(ind) if ind else Indicator(imp)

def TA_ATR(ind=None, timeperiod=14):
        imp = crtTaIndicatorImp(ta.ATR, 'TA_ATR', 
                                result_num = 1,
                                params={'timeperiod': timeperiod},
                                prices = ['high', 'low', 'close'])
        return Indicator(imp)(ind) if ind else Indicator(imp)

def TA_MIDPOINT(ind=None, timeperiod=14):
        imp = crtTaIndicatorImp(ta.MIDPOINT, 'TA_MIDPOINT', 
                                result_num = 1,
                                params={'timeperiod': timeperiod})
        return Indicator(imp)(ind) if ind else Indicator(imp)

def TA_CDLTHRUSTING(ind=None):
        imp = crtTaIndicatorImp(ta.CDLTHRUSTING, 'TA_CDLTHRUSTING', 
                                result_num = 1,
                                prices = ['open', 'high', 'low', 'close'])
        return Indicator(imp)(ind) if ind else Indicator(imp)

def TA_CDLMATHOLD(ind=None, penetration=0.5):
        imp = crtTaIndicatorImp(ta.CDLMATHOLD, 'TA_CDLMATHOLD', 
                                result_num = 1,
                                params={'penetration': penetration},
                                prices = ['open', 'high', 'low', 'close'])
        return Indicator(imp)(ind) if ind else Indicator(imp)

def TA_CDLMARUBOZU(ind=None):
        imp = crtTaIndicatorImp(ta.CDLMARUBOZU, 'TA_CDLMARUBOZU', 
                                result_num = 1,
                                prices = ['open', 'high', 'low', 'close'])
        return Indicator(imp)(ind) if ind else Indicator(imp)

def TA_ROCP(ind=None, timeperiod=10):
        imp = crtTaIndicatorImp(ta.ROCP, 'TA_ROCP', 
                                result_num = 1,
                                params={'timeperiod': timeperiod})
        return Indicator(imp)(ind) if ind else Indicator(imp)

def TA_TYPPRICE(ind=None, timeperiod=14):
        imp = crtTaIndicatorImp(ta.TYPPRICE, 'TA_TYPPRICE', 
                                result_num = 1,
                                prices = ['high', 'low', 'close'])
        return Indicator(imp)(ind) if ind else Indicator(imp)

def TA_CDLSTALLEDPATTERN(ind=None):
        imp = crtTaIndicatorImp(ta.CDLSTALLEDPATTERN, 'TA_CDLSTALLEDPATTERN', 
                                result_num = 1,
                                prices = ['open', 'high', 'low', 'close'])
        return Indicator(imp)(ind) if ind else Indicator(imp)

def TA_EMA(ind=None, timeperiod=30):
        imp = crtTaIndicatorImp(ta.EMA, 'TA_EMA', 
                                result_num = 1,
                                params={'timeperiod': timeperiod})
        return Indicator(imp)(ind) if ind else Indicator(imp)