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Comment by mitchty | Hacker News Reader

You'll probably want to learn the regular unix way as well. Tools like this are nice, but you're already 99% there as it is for most things.

    ls | wc -l

    ls | grep -c .py

(note the cat and pipe are not needed)

    awk -F',' '{sum+=$1}END{print sum}' data.csv

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Yea, IMO the best way to do this with pythonpy is:

  py -l 'len(l)'

That being said, I still use wc -l every time. In fact, I always prefer regular unix commands (e.g. grep, xargs, head) to pythonpy when possible. But there are some things, such as:

  py -l 'l[::2]'

which while possible with tools like sed, are just much better expressed with pythonpy.

> ls | grep -c .py

That won't work if there are files with names like foo.py.txt.

These will:

ls | grep -c '.py$'

or better, because less names to filter out:

ls -l *.py | wc -l

Ah! I haven't thought of using wc, although I frequently use it to count the number of lines in my code. For awk, yes, I have to learn it. Thanks to you and the others who gave the example in bash.

Technically this will work on any shell not just bash but good luck! Shell scripting is rather fun once you get the hang of it. Though if I'm honest, if I get a shell script about 30+ lines I tend to back up and break out ruby/perl/python/anything but shell. Think of it as a succinct glue language and you'll do fine.

In the meantime feel free to use this python thing, its rather fun to be honest. Just wanted to demonstrate the unix-y way of doing it.

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