HUML Day 4 -- Natural Language Processing

Finally Rolling

So we’re having a lot of fun, finally. The students are all able to run python, ipython notebooks, and install python packages, even on Windows! Thank you Anaconda! And we worked on a project to mine the Hack University slack channels for conversation text. We even got a simple generative model working, comparable to the one in Grus’s Data_Science_from_Scratch, Chapter 20.

But the dirth of humanish text on our Slack channel has inspired me to seek out text that was a bit more thoughtfully generated.

Download It All

I went big. My server (and ISP) is running flat out to download the entire Gutenberg collection. I put together a python app to build the excludes list (based on an ls-R file in the root directory). I don’t want to download any of the images or ISOs or even AVIs that are floating around on Gutenberg. My bot’s pretty bookish and only cares about *.txt, not even HTML. I kicked off the rsync -avz process and detached tmux about 15 minutes ago.

Watch Out

Unfortunately it wiped out a few archival photos before I realized that it was syncing the entire drive rather than a subfolder. The sync part of rsync involve a lot of rm -rf. And, man, those trailing slashes on the end of an rsync destination path are dangerous. Got that fixed, but I’m beginning to worry that my --exclude-from list is too thorough. find . -type f returns 0 regular files. But there are about 30k directories in a deep tree so far, growing at about 1k per minute, so maybe it just does the tree first:

$ find . -type d | wc -l
$ find . -type d | wc -l
$ find . -type d | wc -l
$ find . -type f
$ find . -type f | wc -l
$ find . -type d | wc -l

Like a watched pot, things seem to be slowing down. Better stop multi-tasking the samba server with finds.

Of course I’m getting lots of warnings about being unable to set the datetime on my NAS drive, but maybe that’s normal.

rsync: mkstemp "/media/$USER/nas/guten/2/2/0/8/22082/.22082.txt.bE6NwA" failed: Operation not permitted (1)
rsync: failed to set times on "/media/$USER/nas/guten/2/2/2/5/22254/22254-h/images": Operation not permitted (1)
rsync: failed to set times on "/media/$USER/nas/guten/2/2/2/5/22255": Operation not permitted (1)

I hope it’s OK to use the -z option with Gutenberg’s ftp server. I guess I’ll know in the morning.

Morning After

Turns out the problem was that I was trying to preserver, owner, group, device and other linux file properties. I only want the text, so I revised the recommended rsync for my CIFS FAT32 drive:

rsync -rgvz --delete-before --fake-super --exclude-from=data/excludes.txt /media/$USER/nas/guten/

But that didn’t work either. In the end, I just dumbed down rsync by limitting it to DOS capabilities:

rsync -rvz --delete-during --exclude-from=data/excludes.txt /media/$USER/nas/guten/

Now the machines are finally working together to give me some human text in machine-readable form!

Evening After


sent 1,950,622 bytes  received 37,220,139,399 bytes  911,066.81 bytes/sec
total size is 37,232,866,927  speedup is 1.00

All done! Thank you fibersphere for the 8 Mbit/s download rate for continuous download of 37GB! And thank you, Gutenberg Project most of all, for maintaining a reliable connection and consistently high bandwidth.

Now, shall I try out some Julia or stick with Python (really Cython}?

Written on February 21, 2016