What does last_update number 1537233536 mean?

Question

Python

I take the line last_update in the documentation there is a type: ts. Api gives the number 1537233536. What is this number and how to convert to a regular date using Python?

Answer 1

This is the number of seconds from zero

>>> import datetime
>>> datetime.datetime.fromtimestamp(1537233536).strftime("%d.%m.%Y %H:%M:%S")
'18.09.2018 05:18:56'