Convert datetime to epoch in a old Python (2.6)

 Since I always forget how to convert datetime to epoch, I just want to write a memo.

In Python
>>> import datetime
>>> d = datetime.datetime(2019,1,1,0,0,0)
>>> print(d)

2019-01-01 00:00:00

>>> epoch = d.strftime("%s")
>>> print(epoch)

1546300800

On Bash

% date -d @1546300800

Tue Jan  1 00:00:00 GMT 2019