Get UTC timestamp in python. Is there a better way? This seems highly verbose.

utc-timestamp.py

from datetime import tzinfo, timedelta, datetime
import calendar
class UTC(tzinfo):
    """UTC"""
    def utcoffset(self, dt):
        return timedelta(0)
    def tzname(self, dt):
        return "UTC"
    def dst(self, dt):
        return timedelta(0)

utc = UTC()
day = datetime(2012,6,6,tzinfo=utc)
print calendar.timegm(day.utctimetuple())