| # Copyright 2015 The Chromium Authors. All rights reserved. |
| # Use of this source code is governed by a BSD-style license that can be |
| # found in the LICENSE file. |
| |
| |
| """Provides common timestamp functions.""" |
| |
| import datetime |
| import pytz |
| |
| |
| def utctimestamp(dt): |
| """Converts a datetime object into a floating point timestamp since the epoch. |
| |
| dt is the datetime to convert. If dt is a naive (non-tz-aware) object, it |
| will implicitly be treated as UTC. |
| """ |
| epoch = datetime.datetime.utcfromtimestamp(0).replace(tzinfo=pytz.UTC) |
| # This check is from http://stackoverflow.com/a/27596917/3984761. |
| if dt.tzinfo is None or dt.tzinfo.utcoffset(dt) is None: |
| dt = dt.replace(tzinfo=pytz.UTC) |
| return (dt - epoch).total_seconds() |
| |
| |
| def utcnow_ts(): # pragma: no cover |
| """Returns the floating point number of seconds since the UTC epoch.""" |
| return utctimestamp(datetime.datetime.utcnow()) |
