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view python/parse_date.py @ 897:ba2630ce851b
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author | Jeff Hammel <k0scist@gmail.com> |
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date | Mon, 01 Aug 2022 16:40:53 -0700 |
parents | ca1f21d9e621 |
children |
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#!/usr/bin/env python # -*- coding: utf-8 -*- """ parse date """ # imports import argparse import calendar import datetime import sys import time from .formatting import format_table from dateutil.parser import parse __all__ = ['main', 'parse_date', 'epoch2local', 'epoch2utc', 'is_dst', 'timezone'] def is_dst(localtime=None): """returns if daylight savings time is in effect locally""" return time.localtime(localtime).tm_isdst > 0 def timezone(localtime=None): """returns name of local timezone""" return time.tzname[int(is_dst(localtime))] def epoch2local(datestamp): """convert epoch to local time""" return datetime.datetime.fromtimestamp(float(datestamp)) def epoch2utc(datestamp): """convert epoch to UTC""" return datetime.datetime.utcfromtimestamp(float(datestamp)) def parse_date(datestamp, utc=False): """returns seconds since epoch from the supplied date""" try: # already epoch timestamp return float(datestamp) except ValueError: pass # parse the string parsed_date = parse(datestamp) # convert this to seconds since epoch if utc: return float(calendar.timegm(parsed_date.timetuple())) else: return time.mktime(parsed_date.timetuple()) def main(args=sys.argv[1:]): # parse command line parser = argparse.ArgumentParser(description=__doc__) parser.add_argument('date', nargs='+', help="local date to parse") parser.add_argument('--utc', dest='utc', action='store_true', default=False, help="indicate date is in UTC") options = parser.parse_args(args) # parse each date epochs = [parse_date(d, options.utc) for d in options.date] # display results header = ['epoch', 'local', 'UTC'] print (format_table([[d, '{} {}'.format(epoch2local(d), timezone(d)), epoch2utc(d)] for d in epochs], header=header, joiner='|')) if __name__ == '__main__': main()