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August 3, 2020 12:18
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Given a list of date objects - remove duplicates from that list
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| #!/usr/bin/env python | |
| import datetime | |
| import time | |
| import calendar | |
| from typing import List | |
| def dedupe_dates(lst: list, precision: str="day", tz_aware: bool=False) -> List: | |
| """Dedupe a given list of dateobjects | |
| :param lst: list of date objects | |
| :param precision: "day" to dedupe upto day (y/m/d) or "time" for y/m/d h:m:s | |
| :param tz_aware: If true, then dedupe keeping timezones information | |
| """ | |
| dates_dict = {} | |
| k = None | |
| for dt in lst: | |
| if tz_aware: | |
| if not dt.tzinfo: | |
| timestamp = calendar.timegm(dt.timetuple()) | |
| k = datetime.datetime.utcfromtimestamp(timestamp) | |
| else: | |
| timestamp = time.mktime(dt.timetuple()) | |
| k = datetime.datetime.fromtimestamp(timestamp) | |
| else: | |
| if precision == "day": | |
| k = datetime.datetime(dt.year, dt.month, dt.day).timestamp() | |
| elif precision == "time": | |
| k = datetime.datetime(dt.year, dt.month, dt.day, dt.hour, dt.minute, dt.second).timestamp() | |
| dates_dict.update({k: dt}) | |
| return list(dates_dict.values()) | |
| res = dedupe_dates( | |
| [ | |
| datetime.datetime(2006, 4, 13, 0, 0), | |
| datetime.datetime(2006, 4, 13, 0, 0), | |
| datetime.datetime(2021, 5, 1, 0, 0), | |
| datetime.datetime(2021, 5, 1, 0, 0), | |
| datetime.datetime(2020, 4, 23, 0, 0), | |
| datetime.datetime(1997, 9, 15, 4, 0), | |
| datetime.datetime(1997, 9, 15, 0, 0, tzinfo=datetime.timezone(datetime.timedelta(days=-1, seconds=61200))), | |
| datetime.datetime(2020, 4, 23, 0, 0), | |
| datetime.datetime(2005, 5, 30, 0, 0), | |
| datetime.datetime(2021, 5, 31, 0, 0), | |
| datetime.datetime(2020, 6, 1, 1, 5, 9, tzinfo=datetime.timezone(datetime.timedelta(seconds=32400))), | |
| datetime.datetime(2020, 6, 1), | |
| datetime.datetime(2011, 4, 26, 17, 57, 27), | |
| datetime.datetime(2010, 2, 25, 1, 4, 59), | |
| datetime.datetime(2021, 2, 24, 23, 59, 59), | |
| datetime.datetime(2020, 1, 28, 10, 35, 17), | |
| datetime.datetime(2020, 11, 9, 0, 0), | |
| datetime.datetime(2019, 10, 7, 17, 50, 9, tzinfo=datetime.timezone(datetime.timedelta(seconds=10800))), | |
| datetime.datetime(2019, 10, 7, 17, 50, 9, tzinfo=datetime.timezone(datetime.timedelta(seconds=10800))), | |
| ] | |
| ) | |
| print(len(res)) | |
| for r in res: | |
| print(r) |
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