python datetime

[prayagupa]

>>> import datetime
>>> signalDate = datetime.datetime.fromtimestamp(1554425311.595)
>>> signalDate
datetime.datetime(2019, 4, 4, 17, 48, 31, 595000)

>>> datetime.datetime.fromtimestamp(1554425311.595)
datetime.datetime(2019, 4, 4, 17, 48, 31, 595000)

>>> import time;
>>> time.time();
1555787004.645534

>>> datetime.datetime.fromtimestamp(1555787004.645534)
datetime.datetime(2019, 4, 20, 12, 3, 24, 645534)

>>> datetime.datetime.utcfromtimestamp(1555787004.645534)
datetime.datetime(2019, 4, 20, 19, 3, 24, 645534)
>>> datetime.datetime.utcfromtimestamp(1544050874)
datetime.datetime(2018, 12, 5, 23, 1, 14)

local date to epoch

>>> import datetime
>>> datetime.datetime.strptime("2019-04-17", "%Y-%m-%d").timestamp()
1555484400.0

utc date to epoch
>>> datetime.datetime.strptime("2019-04-17", "%Y-%m-%d").replace(tzinfo=datetime.timezone.utc).timestamp()
1555459200.0

[prayagupa]

import itertools
import operator

data = [("golai", 1), ("tolai", 2), ("golai", 3)]

itertools.groupby(data, operator.itemgetter(0))

grouped = {}
for d in data:
    if d[0] in grouped:
        existing = grouped[d[0]]
        existing.append(d)
        grouped[d[0]]=existing
        print(d[0])
    else:
        grouped[d[0]]=[d]

print(grouped)