__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 …

You can list running Jupyter Notebook servers using the following command.

jupyter notebook list

It works well most of the time. However, if the servers are launched using the root account (e.g., in a Docker container), you might encounter issues. In this case, a better alternative is to list …