How to use the langdetect.lang_detect_exception.ErrorCode.InitParamError function in langdetect

def set_prior_map(self, prior_map):
        '''Set prior information about language probabilities.'''
        self.prior_map = [0.0] * len(self.langlist)
        sump = 0.0
        for i in xrange(len(self.prior_map)):
            lang = self.langlist[i]
            if lang in prior_map:
                p = prior_map[lang]
                if p < 0:
                    raise LangDetectException(ErrorCode.InitParamError, 'Prior probability must be non-negative.')
                self.prior_map[i] = p
                sump += p
        if sump <= 0.0:
            raise LangDetectException(ErrorCode.InitParamError, 'More one of prior probability must be non-zero.')
        for i in xrange(len(self.prior_map)):
            self.prior_map[i] /= sump

def set_prior_map(self, prior_map):
        '''Set prior information about language probabilities.'''
        self.prior_map = [0.0] * len(self.langlist)
        sump = 0.0
        for i in xrange(len(self.prior_map)):
            lang = self.langlist[i]
            if lang in prior_map:
                p = prior_map[lang]
                if p < 0:
                    raise LangDetectException(ErrorCode.InitParamError, 'Prior probability must be non-negative.')
                self.prior_map[i] = p
                sump += p
        if sump <= 0.0:
            raise LangDetectException(ErrorCode.InitParamError, 'More one of prior probability must be non-zero.')
        for i in xrange(len(self.prior_map)):
            self.prior_map[i] /= sump