65 lines
2.0 KiB
Python
65 lines
2.0 KiB
Python
# Copyright 2016 - Nokia
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#
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# Licensed under the Apache License, Version 2.0 (the "License"); you may
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# not use this file except in compliance with the License. You may obtain
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# a copy of the License at
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#
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# http://www.apache.org/licenses/LICENSE-2.0
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#
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# Unless required by applicable law or agreed to in writing, software
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# distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
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# WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
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# License for the specific language governing permissions and limitations
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# under the License.
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from datetime import datetime
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from datetime import timedelta
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from dateutil import parser
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from oslo_utils import timeutils
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TIMESTAMP_FORMAT = '%Y-%m-%dT%H:%M:%SZ'
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def utcnow(with_timezone=True):
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"""Better version of utcnow() that returns utcnow with a correct TZ."""
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return timeutils.utcnow(with_timezone)
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def format_utcnow(with_timezone=True, date_format=TIMESTAMP_FORMAT):
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return utcnow(with_timezone).strftime(date_format)
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def change_time_str_format(timestamp_str, old_format, new_format):
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utc = datetime.strptime(timestamp_str, old_format)
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return utc.strftime(new_format)
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def change_to_utc_time_and_format(timestamp_str, new_format):
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timestamp = parser.parse(timestamp_str)
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timestamp = timestamp - timedelta(seconds=(
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datetime.now() - datetime.utcnow()).total_seconds())
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return timestamp.strftime(new_format)
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def format_unix_timestamp(timestamp, date_format=TIMESTAMP_FORMAT):
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return datetime.fromtimestamp(float(timestamp)) \
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.strftime(date_format)
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def format_timestamp(timestamp_str, new_format=TIMESTAMP_FORMAT):
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return parser.parse(timestamp_str).strftime(new_format) if timestamp_str \
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else None
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def datetime_delta(delta_seconds,
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time_to_use=None,
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with_timezone=True,
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date_format=TIMESTAMP_FORMAT):
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if time_to_use:
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t = time_to_use
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else:
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t = utcnow(with_timezone)
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return (t + timedelta(seconds=delta_seconds)).strftime(date_format)
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