naturaltime() supports timedelta.

It is not documented, but humanize.naturaltime() accepts timedelta. I used it for years until type annotations were added, and MyPy started to complain. timedelta is still accepted at runtime.

>>> import datetime, humanize
>>> humanize.naturaltime(datetime.timedelta(days=5, hours=3))
'5 days ago'
>>> humanize.naturaltime(datetime.timedelta(hours=123))
'5 days ago'

I expect one of two things:

1. Document that humanize.naturaltime() accepts timedelta, not only datetime | int and update type annotation.
2. Make humanize.naturaltime() rejecting timedelta (of course, after some deprecation period).

Option 1 is more compatible, but option 2 looks more logical.

naturaltime() and naturaldelta() accept not only int, but float too.

>>> humanize.naturaltime(23.5)
'23 seconds ago'
>>> humanize.naturaldelta(23.5)
'23 seconds'

It is expected, since timestamp in Python is float, but it should be documented, and annotations should be updated.

naturaltime(), naturaldelta() , naturaldate() and naturalday() accept arbitrary object without error.

>>> humanize.naturaltime([1, 2, 3])
'[1, 2, 3]'
>>> humanize.naturaldelta([1, 2, 3])
'[1, 2, 3]'
>>> humanize.naturaldate([1, 2, 3])
'[1, 2, 3]'
>>> humanize.naturalday([1, 2, 3])
'[1, 2, 3]'

It is unsafe, because allows programming errors to slip unnoticed. humanize.naturalsize() raises an error, as expected.

Humanize 4.2.1