matplotlib - Python list and time -

i trying current time , store when run os command ( runs once second) can plot graph of time vs output of command.

when try store current time in list using: (timelist empty list)

timelist.append (datetime.datetime.time(datetime.datetime.now())) 

i this:

[datetime.time(23, 57, 8, 86885), datetime.time(23, 57, 8, 87091),  datetime.time(23, 57, 9, 90906), datetime.time(23, 57, 10, 95045),  datetime.time(23, 57, 10, 95110), datetime.time(23, 57, 10, 95148),  datetime.time(23, 57, 10, 95166), datetime.time(23, 57, 10, 95178)] 

so in 1 second, instead of 1 list item current time, 2, or 3 items). how capture time @ instant , store in list can use pyplot plot this?

i using this, , works fine (python 3.3+):

from datetime import datetime time_list = [] time_list.append(datetime.now()) 

if want save or send other application without converting types can think use timestamp rather:

from datetime import datetime time_list = [] time_list.append(datetime.now().timestamp())