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# Protocol Buffers - Google's data interchange format # Copyright 2008 Google Inc. All rights reserved. # # Use of this source code is governed by a BSD-style # license that can be found in the LICENSE file or at # https://developers.google.com/open-source/licenses/bsd """Contains the Timestamp helper APIs.""" import datetime from typing import Optional from google.protobuf.timestamp_pb2 import Timestamp def from_json_string(value: str) -> Timestamp: """Parse a RFC 3339 date string format to Timestamp. Args: value: A date string. Any fractional digits (or none) and any offset are accepted as long as they fit into nano-seconds precision. Example of accepted format: '1972-01-01T10:00:20.021-05:00' Raises: ValueError: On parsing problems. """ timestamp = Timestamp() timestamp.FromJsonString(value) return timestamp def from_microseconds(micros: float) -> Timestamp: """Converts microseconds since epoch to Timestamp.""" timestamp = Timestamp() timestamp.FromMicroseconds(micros) return timestamp def from_milliseconds(millis: float) -> Timestamp: """Converts milliseconds since epoch to Timestamp.""" timestamp = Timestamp() timestamp.FromMilliseconds(millis) return timestamp def from_nanoseconds(nanos: float) -> Timestamp: """Converts nanoseconds since epoch to Timestamp.""" timestamp = Timestamp() timestamp.FromNanoseconds(nanos) return timestamp def from_seconds(seconds: float) -> Timestamp: """Converts seconds since epoch to Timestamp.""" timestamp = Timestamp() timestamp.FromSeconds(seconds) return timestamp def from_current_time() -> Timestamp: """Converts the current UTC to Timestamp.""" timestamp = Timestamp() timestamp.FromDatetime(datetime.datetime.now(tz=datetime.timezone.utc)) return timestamp def to_json_string(ts: Timestamp) -> str: """Converts Timestamp to RFC 3339 date string format. Returns: A string converted from timestamp. The string is always Z-normalized and uses 3, 6 or 9 fractional digits as required to represent the exact time. Example of the return format: '1972-01-01T10:00:20.021Z' """ return ts.ToJsonString() def to_microseconds(ts: Timestamp) -> int: """Converts Timestamp to microseconds since epoch.""" return ts.ToMicroseconds() def to_milliseconds(ts: Timestamp) -> int: """Converts Timestamp to milliseconds since epoch.""" return ts.ToMilliseconds() def to_nanoseconds(ts: Timestamp) -> int: """Converts Timestamp to nanoseconds since epoch.""" return ts.ToNanoseconds() def to_seconds(ts: Timestamp) -> int: """Converts Timestamp to seconds since epoch.""" return ts.ToSeconds() def to_datetime( ts: Timestamp, tz: Optional[datetime.tzinfo] = None ) -> datetime.datetime: """Converts Timestamp to a datetime. Args: tz: A datetime.tzinfo subclass; defaults to None. Returns: If tzinfo is None, returns a timezone-naive UTC datetime (with no timezone information, i.e. not aware that it's UTC). Otherwise, returns a timezone-aware datetime in the input timezone. """ return ts.ToDatetime(tzinfo=tz)
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