in QueryGenerator.py [0:0]
def genSeq(self):
if self.length is not None:
n = len(self.data_generator)
assert(n > 1)
by = (n-1) / self.length
else:
n = QueryGenerator.END
by = self.by
i = 1
while i*by < len(self.data_generator):
yield int(i*by)
i += 1
if i*by != n-1:
yield QueryGenerator.END