__file__ is the path of the Python script. Note that if you make a sybolic link to a Python script and run the symbolic link, then __file__ is the path of the symbolic link. Of course, you can use os.path.realpath to get real path of files.

pathlib.Path …

Python pandas

My first choice is pandas in Python. However, below are some tools for quick and dirty solutions.

q

q -t -H 'select c1, c3 from file.txt'

cut

cut -d\t -f1,3 file.txt

awk

awk -F'\t' '{print $1 "\t" $3}' file.tsv 

Note: neither cut …

Linux

1. Get information of the staff group.

   $ getent group staff
   staff:x:20:
   

2. Get group ID of the staff group.

   $ getent group staff | cut -d: -f3
   20
   

Mac

1. Get information of the staff group.

   $ dscl . -read /Groups/staff
   

2. Get group ID of the staff group.

   $ dscl . -read /Groups/staff | awk …