In Python, how can I put a thread to sleep until a specific time?

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Here’s a half-ass solution that doesn’t account for clock jitter or adjustment of the clock. See comments for ways to get rid of that.

import time
import datetime

# if for some reason this script is still running
# after a year, we'll stop after 365 days
for i in xrange(0,365):
    # sleep until 2AM
    t = datetime.datetime.today()
    future = datetime.datetime(t.year,t.month,t.day,2,0)
    if t.hour >= 2:
        future += datetime.timedelta(days=1)
    time.sleep((future-t).total_seconds())
    
    # do 2AM stuff

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