# Start a local webserver to serve the file of your current directory on the LAN:
# Python version 2.x:
python -m SimpleHTTPServer 
# Python version 3.x:
python3 -m http.server

#Start a local SMTP server to debug your app emails. Emails will be printed on stdout:
python -m smtpd -c DebuggingServer -n

#Parse and prettify a JSON string with:
cat mydata.json | python -m json.tool