How old are you in days?

Problem
You want to calculate how old you are in days.

Solution
Let’s use a popular 3rd party date/time library for this purpose called pendulum.

As an example, let’s take Arnold Schwarzenegger, who was born on July 30, 1947. So let’s answer the following question: how old is Schwarzenegger today?

>>> import pendulum
>>> 
>>> born = pendulum.parse("1947-07-30")
>>> born
DateTime(1947, 7, 30, 0, 0, 0, tzinfo=Timezone('UTC'))
>>> today = pendulum.now()
>>> today
DateTime(2018, 8, 14, 21, 32, 33, 248489, tzinfo=Timezone('Europe/Budapest'))
>>> 
>>> diff = today - born
>>> diff
<Period [1947-07-30T00:00:00+00:00 -> 2018-08-14T21:32:33.248489+02:00]>
>>> 
>>> diff.in_years()
71
>>> diff.in_words()
'71 years 2 weeks 1 day 19 hours 32 minutes 33 seconds'
>>> diff.in_days()
25948