_get.raise_for_status()
headers = {'user-agent':
    'Mozilla/5.0 (Windows NT 10.0; WOW64; rv:43.0) Gecko/20100101 Firefox/43.0'
    }
_get = get('http://stats.nba.com/stats/playergamelog', params={'PlayerID': 
    203082, 'Season': '2015-16', 'SeasonType': 'Regular Season'}, headers=
    headers)
Python get raises HTTPError 400 Client Error, but after manually accessing URL, get works temporarily