davipatti / terry-computing-course

Brief notes from Terry's python/computing course.

Random things I learnt from Terry

Last day of his summer python course.

split

Split files up.

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$CD_PATH

When you run cd, if current directory does not contain the target, then check CD_PATH for target and if present CD there.

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man pages

Convention. Argument in square brackets is optional.

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echo

Use echo to print commands before running them when developing shell scripts to make sure it will do what you think it will.

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#!/bin/bash -x

This will just print commands in the script instead of running them.

(Terry fairly sure this is correct flag but not 100%).

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make

If you don't give any arguments, it does the first target in the file.

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glob

from glob import glob
print glob('*.c')

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parallel

for i in x???
do
echo "wc $i > output"
done

parallel --bar 'wc {} > /dev/null' ::: x??

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zcat

Cats a compressed file.