added time library
This commit is contained in:
Daniel Tsvetkov
parent
65b24f5172
commit
e4eafb5dd8
263
src/tww/time_lib.py
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263
src/tww/time_lib.py
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import datetime
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import os
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from datetime import datetime, timedelta
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import pytz
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from dateparser import parse as parse_dt
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from dateparser.timezone_parser import StaticTzInfo
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from dateutil.tz import tzlocal, gettz
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from tww import parse_query, solve_query, TZ_OFFSETS
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def tzinfo_from_offset(offset):
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if ':' in offset:
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''.join(offset.split(':'))
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tznames = TZ_OFFSETS.get(offset)
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if not tznames:
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return pytz.timezone("utc")
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for tzname in tznames:
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if tzname.startswith('Etc/GMT'):
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return pytz.timezone(tzname)
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return pytz.timezone(tznames[0])
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def time_ago(date=None, diff=None):
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"""
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Get a datetime object, timedelta object or a int() Epoch timestamp and return a
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pretty string like 'an hour ago', 'Yesterday', '3 months ago',
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'just now', etc
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Modified from: http://stackoverflow.com/a/1551394/141084
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"""
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now = get_utcnow()
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if not date:
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if diff:
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diff = timedelta(seconds=diff)
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else:
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diff = now - now
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else:
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if type(date) is str:
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parsed_dt = parse_dt(date)
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if parsed_dt.tzinfo is not None:
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now = get_utcnow(tzaware=True)
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diff = now - parsed_dt
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elif type(date) is timedelta:
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diff = date
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elif type(date) is int:
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diff = now - datetime.fromtimestamp(date)
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elif isinstance(date, datetime):
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if date.tzinfo is not None:
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now = get_utcnow(tzaware=True)
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diff = now - date
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else:
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raise ValueError('invalid date %s of type %s' % (date, type(date)))
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sign = ''
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if diff.days < 0:
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diff = -diff
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sign = '-'
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second_diff = diff.seconds
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day_diff = diff.days
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if day_diff == 0:
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if second_diff < 60:
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return str("{}{:02d}".format(sign, second_diff))
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seconds = second_diff % 60
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if second_diff < 3600:
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min_diff = second_diff // 60
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return str("{}{:02d}:{:02d}".format(sign, min_diff, seconds))
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minutes = second_diff % 3600 // 60
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if second_diff < 86400:
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hrs_diff = second_diff // 3600
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return str("{}{:02d}:{:02d}:{:02d}".format(sign, hrs_diff, minutes, seconds))
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seconds = second_diff % 60
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minutes = second_diff % 3600 // 60
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hours = second_diff // 3600
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if day_diff < 365:
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if day_diff < 30:
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return str("{}{}d{:02d}:{:02d}:{:02d}".format(sign, day_diff, hours, minutes, seconds))
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months, days = day_diff // 30, day_diff % 30
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return str("{}{}m{}d{:02d}:{:02d}:{:02d}".format(sign, months, days, hours, minutes, seconds))
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years = day_diff // 365
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days = day_diff % 365
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months, days = days // 30, days % 30
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return str("{}{}y{}m{}d{:02d}:{:02d}:{:02d}".format(sign, years, months, days, hours, minutes, seconds))
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def query_to_dt(query):
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human_dt, human_tz_loc = parse_query(query)
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return solve_query(human_dt, human_tz_loc)
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# ==================
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def dateparser_parse_dt(s: str):
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print("Dateparser query: {}".format(s))
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parsed = parse_dt(s)
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print("Dateparser parsed query: {}".format(parsed))
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return parsed
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def get_utcnow(tzaware: bool = False):
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if tzaware:
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return datetime.utcnow().replace(tzinfo=pytz.UTC)
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return datetime.utcnow()
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def dt_tz_translation(dt: datetime, to_tz: str, from_tz: str = "+00:00"):
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if ':' in to_tz:
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to_shh, to_mm = to_tz.split(':')
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else:
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to_shh, to_mm = to_tz[:-2], to_tz[-2:]
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if ':' in from_tz:
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from_shh, from_mm = from_tz.split(':')
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else:
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from_shh, from_mm = from_tz[:-2], to_tz[-2:]
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tzinfo = tzinfo_from_offset(to_tz)
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if dt.tzinfo:
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return dt.astimezone(tzinfo)
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r_dt = dt + timedelta(hours=int(to_shh), minutes=int(to_mm)) - timedelta(hours=int(from_shh), minutes=int(from_mm))
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r_dt.replace(tzinfo=tzinfo)
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return r_dt
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def format_offset_from_timedelta(tdelta: timedelta):
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sign = "+" if tdelta.seconds >= 0 else "-"
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h = tdelta.seconds // 3600
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m = (tdelta.seconds // 60) - h * 60
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return "{}{:02d}:{:02d}".format(sign, h, m)
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def get_local_tzname_iana():
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return '/'.join(os.path.realpath(gettz()._filename).split('/')[-2:])
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def get_local_tz_offset():
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return format_offset_from_timedelta(datetime.now(tzlocal()).tzinfo._std_offset)
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def tzname_to_tz_offset(tzname_iana: str):
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return format_offset_from_timedelta(pytz.timezone(tzname_iana).utcoffset(get_utcnow()))
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def get_dt_tz_offset(dt: datetime):
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if dt.tzinfo is not None:
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if type(dt.tzinfo) is StaticTzInfo:
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tzoffset = dt.tzinfo._StaticTzInfo__offset
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else:
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tzoffset = dt.tzinfo._utcoffset
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return format_offset_from_timedelta(tzoffset)
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return "+00:00"
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def get_seconds_since_epoch(dt):
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return int(dt.timestamp())
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def epoch_to_dt(seconds):
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return datetime.fromtimestamp(seconds)
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def time_to_emoji(dt):
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seconds = get_seconds_since_epoch(dt)
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a = int((seconds / 900 - 3) / 2 % 24)
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return chr(128336 + a // 2 + a % 2 * 12)
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if __name__ == "__main__":
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print(get_local_tzname_iana())
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print(get_local_tz_offset())
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print(tzname_to_tz_offset(
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get_local_tzname_iana()
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))
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print(dt_tz_translation(
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get_utcnow(),
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get_local_tz_offset()
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))
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print(time_to_emoji(
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dt_tz_translation(
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get_utcnow(),
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get_local_tz_offset()
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)
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))
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print(get_seconds_since_epoch(
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dateparser_parse_dt("2019-12-11 15:53:40+0000")
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))
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# QUERIES....
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"<TIME>"
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"================="
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"2019-12-12T03:14:15" # ISO-8601 Naive time
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"2019-12-12T03:14:15+0000" # ISO-8601 Timezone aware
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"in 3 hours" # Time:relative:future
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"5 days ago" # Time:relative:past
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"<TIME> IN <WHEREVER>"
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"================="
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"Now in epoch" # Absolute:Epoch
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"Now in New York" # Location:City
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"Now in Bulgaria" # Location:Country
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"Now in USA" # Location:Country - multiple timezones
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"Now in CET" # Timezone:Abbreviation - https://en.wikipedia.org/wiki/List_of_time_zone_abbreviations
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"Now in Europe/Zurich" # Timezone:IANA - tz db, https://en.wikipedia.org/wiki/List_of_tz_database_time_zones, timezone database
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"Now in Alfa" # Timezone:Military - https://en.wikipedia.org/wiki/List_of_military_time_zones
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"Now in +02:00" # Timezone:Offset - https://en.wikipedia.org/wiki/List_of_UTC_time_offsets
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"<TIMEDELTA>"
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"================="
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"Time since <TIME>" # Timedelta:past
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"Time until <TIME>" # Timedelta:future
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# strptime: str -> datetime
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# strftime: datetime -> str
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# %Y Year with century as a decimal number.
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# %m Month as a decimal number [01,12].
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# %d Day of the month as a decimal number [01,31].
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# %H Hour (24-hour clock) as a decimal number [00,23].
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# %M Minute as a decimal number [00,59].
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# %S Second as a decimal number [00,61].
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# %z Time zone offset from UTC.
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# %a Locale's abbreviated weekday name.
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# %A Locale's full weekday name.
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# %b Locale's abbreviated month name.
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# %B Locale's full month name.
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# %c Locale's appropriate date and time representation.
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# %I Hour (12-hour clock) as a decimal number [01,12].
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# %p Locale's equivalent of either AM or PM.
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# https://docs.python.org/3/library/datetime.html
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#
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# %a Weekday as locale’s abbreviated name. "Sun, Mon, …, Sat (en_US); So, Mo, …, Sa (de_DE)
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# %A Weekday as locale’s full name. Sunday, Monday, …, Saturday (en_US); Sonntag, Montag, …, Samstag (de_DE)
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# %w Weekday as a decimal number, where 0 is Sunday and 6 is Saturday. 0, 1, …, 6
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# %d Day of the month as a zero-padded decimal number. 01, 02, …, 31
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# %b Month as locale’s abbreviated name. Jan, Feb, …, Dec (en_US); Jan, Feb, …, Dez (de_DE)
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# %B Month as locale’s full name. January, February, …, December (en_US); Januar, Februar, …, Dezember (de_DE)
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# %m Month as a zero-padded decimal number. 01, 02, …, 12
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# %y Year without century as a zero-padded decimal number. 00, 01, …, 99
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# %Y Year with century as a decimal number. 0001, 0002, …, 2013, 2014, …, 9998, 9999
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# %H Hour (24-hour clock) as a zero-padded decimal number. 00, 01, …, 23
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# %I Hour (12-hour clock) as a zero-padded decimal number. 01, 02, …, 12
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# %p Locale’s equivalent of either AM or PM. AM, PM (en_US); am, pm (de_DE)
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# %M Minute as a zero-padded decimal number. 00, 01, …, 59
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# %S Second as a zero-padded decimal number. 00, 01, …, 59
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# %f Microsecond as a decimal number, zero-padded on the left. 000000, 000001, …, 999999
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# %z UTC offset in the form ±HHMM[SS[.ffffff]]
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# (empty string if the object is naive). (empty), +0000, -0400, +1030, +063415, -030712.345216
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# %Z Time zone name (empty string if the object is naive). (empty), UTC, EST, CST
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# %j Day of the year as a zero-padded decimal number. 001, 002, …, 366
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# %U Week number of the year (Sunday as the first day of the week)
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# as a zero padded decimal number. All days in a new year
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# preceding the first Sunday are considered to be in week 0. 00, 01, …, 53
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# %W Week number of the year (Monday as the first day of the week)
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# as a decimal number. All days in a new year preceding the
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# first Monday are considered to be in week 0. 00, 01, …, 53
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# %c Locale’s appropriate date and time representation. Tue Aug 16 21:30:00 1988 (en_US); Di 16 Aug 21:30:00 1988 (de_DE)
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# %x Locale’s appropriate date representation. 08/16/1988 (en_US); 16.08.1988 (de_DE)
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# %X Locale’s appropriate time representation. 21:30:00 (en_US); 21:30:00 (de_DE)
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# %% A literal '%' character. %
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