import datetime
import time
timestamp = datetime.datetime.now().time() # Throw away the date information
time.sleep(1)
print (datetime.datetime.now().time() > timestamp) # >>> True (unless you ran this one second before midnight!)
# Or check if a time is between two other times
start = datetime.time(8, 30)
end = datetime.time(15)
print (start <= timestamp <= end) # >>> depends on what time it is
start = datetime.time(17, 30)
end = datetime.time(18, 40)
print (datetime.datetime.now().time() > timestamp)