This is useful when you need to convert a datetime.datetime.now() or datetime.date.today() into a unix epoch seconds, with microsecond precision (precision only applies to datetime.datetime, as datetime.date won't have any microseconds).
I have found this is necessary for when storing the DateTime in the models as a FloatField, in order to keep the usec/microsecond precision.
At some point, I will probably create a custom model field called DateTimeWithUSec or something like that, but for now, this will do :)
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 | def GetCurrentMicroSeconds(dt=None):
# Ensure the type matches
if not dt:
dt = datetime.datetime.now()
elif type(dt) == type(datetime.datetime.now()):
return time.mktime(dt.timetuple())+float("0.%s"%dt.microsecond)
elif type(dt) == type(datetime.date.today()):
return time.mktime(dt.timetuple())
else:
raise ValueError, "You may only use a datetime.datetime or datetime.date instance with GetCurrentMicroSeconds"
"""
Basic Usage
"""
import datetime
# create two example dates
t = datetime.date.today()
ts = datetime.datetime.now()
# returns something like 1272322800.0
GetCurrentMicroSeconds(t)
# returns something like 1272366481.381309
GetCurrentMicroSeconds(ts)
"""
Example Django Usage:
"""
class TestObject:
date_created = models.FloatField(default=time.time, editable=False, blank=False, null=False)
# Determine the current day, month and year.
today = datetime.date.today()
# Determine first day of month
first_day = datetime.date(today.year, today.month, 1)
# Determine last day of month
last_day = last_day_of_month(today.year, today.month)
result = TestObject.objects.filter(
date_created__gte = GetCurrentMicroSeconds(first_day),
date_created__lte = GetCurrentMicroSeconds(last_day)
)
|
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