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__init__.py	0 B	0644	Edit Rename Delete
exceptions.py	1.8 KB	0644	Edit Rename Delete
utils.py	3.17 KB	0644	Edit Rename Delete

Edit File:utils.py

import datetime
import re

from typing import Optional

def datetime_now() -> datetime.datetime:
    """
    Return the current local date and time.
    :return: Returns an aware datetime object of the current date
        and time.
    """
    return datetime.datetime.now(tz=datetime.timezone.utc)

def datetime_to_str(dt: datetime.datetime) -> str:
    """
    Convert a datetime object into a ISO 8601 string, e.g.
    '2019-04-24T17:06:53.039991Z'.
    :param dt: The datetime object to process.
    :return: Return a string representing the date in
        ISO 8601 (timezone=UTC).
    """
    return dt.astimezone(tz=datetime.timezone.utc).strftime(
        '%Y-%m-%dT%H:%M:%S.%fZ')

def str_to_datetime(string: str) -> datetime.datetime:
    """
    Convert an ISO 8601 string into a datetime object.
    The following formats are supported:

- 2020-03-03T09:21:43.636153304Z
    - 2020-03-03T15:52:30.136257504-0600
    - 2020-03-03T15:52:30.136257504

:param string: The string to parse.
    :return: Returns an aware datetime object of the given date
        and time string.
    :raises: :exc:`~exceptions.ValueError` for an unknown
        datetime string.
    """
    fmts = [
        '%Y-%m-%dT%H:%M:%S.%f',
        '%Y-%m-%dT%H:%M:%S.%f%z'
    ]

# In *all* cases, the 9 digit second precision is too much for
    # Python's strptime. Shorten it to 6 digits.
    p = re.compile(r'(\.[\d]{6})[\d]*')
    string = p.sub(r'\1', string)

# Replace trailing Z with -0000, since (on Python 3.6.8) it
    # won't parse.
    if string and string[-1] == 'Z':
        string = string[:-1] + '-0000'

for fmt in fmts:
        try:
            dt = datetime.datetime.strptime(string, fmt)
            # Make sure the datetime object is aware (timezone is set).
            # If not, then assume the time is in UTC.
            if dt.tzinfo is None:
                dt = dt.replace(tzinfo=datetime.timezone.utc)
            return dt
        except ValueError:
            pass

raise ValueError("Time data {} does not match one of the formats {}".format(
        string, str(fmts)))

def parse_timedelta(delta: str) -> Optional[datetime.timedelta]:
    """
    Returns a timedelta object represents a duration, the difference
    between two dates or times.

>>> parse_timedelta('foo')

>>> parse_timedelta('2d')
    datetime.timedelta(days=2)

>>> parse_timedelta("4w")
    datetime.timedelta(days=28)

>>> parse_timedelta("5s")
    datetime.timedelta(seconds=5)

>>> parse_timedelta("-5s")
    datetime.timedelta(days=-1, seconds=86395)

:param delta: The string to process, e.g. '2h', '10d', '30s'.
    :return: The `datetime.timedelta` object or `None` in case of
        a parsing error.
    """
    parts = re.match(r'(?P<seconds>-?\d+)s|'
                     r'(?P<minutes>-?\d+)m|'
                     r'(?P<hours>-?\d+)h|'
                     r'(?P<days>-?\d+)d|'
                     r'(?P<weeks>-?\d+)w$',
                     delta,
                     re.IGNORECASE)
    if not parts:
        return None
    parts = parts.groupdict()  # type: ignore
    args = {name: int(param) for name, param in parts.items() if param}  # type: ignore
    return datetime.timedelta(**args)

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Edit File:utils.py