import webanalyzer

w = webanalyzer.WebAnalyzer()

w.headers = {
    "User-Agent": "custom ua",
    "header-key": "header-value"
}

w.allow_redirect = True
w.aggression = 0
r = w.start("http://www.fatezero.org")

print(r)

[{'name': 'Script', 'origin': 'whatweb'}, {'name': 'HTML5', 'origin': 'whatweb'}, {'name': 'Fastly', 'origin': 'wappalyzer'}, {'name': 'Varnish', 'origin': 'wappalyzer'}, {'name': 'GitHub Pages', 'origin': 'wappalyzer'}, {'name': 'Ruby on Rails', 'origin': 'implies'}, {'name': 'Ruby', 'origin': 'implies'}]