A short gist on how to post a push notifications on Android with Python and requests. Much easier to fiddle with this intuitive code when exploring FCM compared to for example Postman.

simple_fcm.py

import requests
import json

body = {
	"data":{
		"title":"Panprices",
		"body":"Go online and shop!",
		"url":"https://www.panprices.com"
	},
	"notification": {  
		"title":"Panprices",
		"body":"Has now a bunch of new offers",
		"content_available": "true"
	},
	"to":"<add a token to your user here>"
}

headers = {"Content-Type":"application/json", "Authorization": "key=<your server key here>"}

try :
	res = requests.post(
		'https://fcm.googleapis.com/fcm/send',
		data=json.dumps(body),
		headers=headers
	)
except Exception as e:
	print("There was an error: ", e)
finally :
	print res.status_code