A template for Python CLI utlities
This is almost an exact copy of the proposed CLI template presented in Columbia's applied data science manual, in chapter 3.2. I use it as a starter template for general purpose file processing scripts.
It is intended to be run via python util.py [options] [file]. By default, the output is printed to STDOUT
and the input can be either a file, or if non is supplied, a pipe from STDIN: cat file.csv | python util.py ....