How to use the fakeredis._server.Float.encode function in fakeredis

def hincrbyfloat(self, key, field, amount):
        c = Float.decode(key.value.get(field, b'0')) + Float.decode(amount)
        if not isfinite(c):
            raise redis.ResponseError(NONFINITE_MSG)
        encoded = Float.encode(c, True)
        key.value[field] = encoded
        key.updated()
        return encoded

def incrbyfloat(self, key, amount):
        # TODO: introduce convert_order so that we can specify amount is Float
        c = Float.decode(key.get(b'0')) + Float.decode(amount)
        if not isfinite(c):
            raise redis.ResponseError(NONFINITE_MSG)
        encoded = Float.encode(c, True)
        key.update(encoded)
        return encoded

def zscore(self, key, member):
        try:
            return Float.encode(key.value[member], False)
        except KeyError:
            return None

def zincrby(self, key, increment, member):
        # Can't just default the old score to 0.0, because in IEEE754, adding
        # 0.0 to something isn't a nop (e.g. 0.0 + -0.0 == 0.0).
        try:
            score = key.value.get(member, None) + increment
        except TypeError:
            score = increment
        if math.isnan(score):
            raise redis.ResponseError(SCORE_NAN_MSG)
        key.value[member] = score
        key.updated()
        return Float.encode(score, False)