Yet another script to get someone's info from Miiverse BUT THEN returning as JSON

miiverse.py

#!/usr/bin/python
from lxml import html
import urllib.request, urllib.error, sys, json

if not len(sys.argv) > 1:
	print('Usage: %s [username]' % sys.argv[0])
	sys.exit(1)
username = sys.argv[1]
try:
	req = urllib.request.urlopen('https://miiverse.nintendo.net/users/{}/favorites?locale.lang=en-US'.format(username))
except urllib.error.HTTPError as error:
	print('HTTP err ' + str(error.code))
	sys.exit(1)
ftree = html.fromstring(req.read().decode())
username = ftree.xpath('//*[@id="sidebar-profile-body"]/p/text()')[0]
name = ftree.xpath('//*[@id="sidebar-profile-body"]/a/text()')[0]
mii = ftree.xpath('//*[@id="sidebar-profile-body"]/div/a/img/@src')[0]
comment = ftree.xpath('//*[@id="sidebar"]/div[3]/div[1]/p/text()')
banned = True if comment == 'Profile comment hidden by admin.' else False 
followers = ftree.xpath('//*[@id="sidebar"]/div[2]/div/a[1]/span[2]/span/text()')[0]
posts = ftree.xpath('//*[@id="sidebar"]/div[2]/div/a[1]/span[2]/span/text()')[0]
yeahs = ftree.xpath('//*[@id="sidebar"]/div[2]/div/a[2]/span[2]/span/text()')[0]
print(json.dumps(
{
	'username': username,
	'name': name,
	'mii': mii,
	'happy': mii.replace('normal', 'happy'),
	'comment': comment[0] if comment else "",
	'posts': int(posts),
	'yeahs': int(yeahs),
	'followers': int(followers),
	'banned': banned,
}
))