Simple python script designed with RPi headless in mind. It will get the local IP address on boot and send it as a PushBullet notification.

pi-net.py

#! /usr/local/bin/python3

import netifaces
from pushbullet import Pushbullet

#Setup PushBullet
pb = Pushbullet("YOUR_PB_API_KEY")

#Gets the local IP of the wlan0 interface
localip = netifaces.ifaddresses('wlan0')[netifaces.AF_INET][0]['addr']

#Send push
pb.push_note("Raspberry Pi IP", localip)

#print(localip)