Spinner in python.

spinner.py

import sys
import time

def spinning_cursor():
    while True:
        for cursor in '|/-\\':
            yield cursor

def start():
    spinner = spinning_cursor()
    while True:                            # spin forever
        sys.stdout.write(next(spinner))    # in python3 use this line of code
#       sys.stdout.write(spinner.next())     in python2 use this line of code
        sys.stdout.flush()
        time.sleep(0.1)
        sys.stdout.write('\b')


# function start can be called from any other python script by just importing spinner script