using robobrowser and beautiful soup. Supports both python 2.7 and 3

getting fb username(2).py

from robobrowser import RoboBrowser
from getpass import getpass
from bs4 import BeautifulSoup as bs

browser = RoboBrowser(history=True)
browser.open('https://m.facebook.com/')

# GETTING INPUT
mail = input('Email : ')
password = getpass('Password : ')

#FORM FILL
form = browser.get_form()
form['email'].value=mail
form['pass'].value=password
browser.submit_form(form)

#PARSER (can also be implemented from robobrowser)
soup = browser.parsed
try:
	soup = soup.find("label", {"for" : "u_0_0"})
	username = soup.a
	username.clear()
	username = str(username)
	profile = username[username.find('/')+1 : username.find('?')]
	print (profile)
except:
	print("wrong credentials!")