still got python3 compatibility issue in segmentation scripts

[XIAOYixuan]

kaldi/egs/wsj/s5/steps/segmentation/internal/merge_targets.py

Line 114 in abd4869

num_sources = len(row) / dim

kaldi/egs/wsj/s5/steps/segmentation/internal/merge_targets.py

Line 134 in abd4869

for source_idx in range(num_sources):

I tried this new script recently and my program crashed at line 134(as referenced above), the error log says num_sources is not an int.
In python 3, though both len(row) and dim are ints, and len(row) is divisible by dim, the type of the result is still "float", which caused that error.

[danpovey]

I think if you put c = a // b it should work. Can you also change the shebang (first line) to python3, remove the from __future__ statements (no longer needed), re-test, and if it works, make a PR?

[XIAOYixuan]

sure, I'm re-testing now

[kkm000]

Fixed in #3094.