How to identify which numbers in a list are within each others' range

[erikcw]

Hi,

I have a list of numbers each with a +/- margin of error.  I need to
identify which ones overlab each other.

For example:
55 +/- 3
20 +/- 2
17 +/- 4
60 +/- 3

#base, max, min
list = [
(55, 58, 52),
(20, 22, 18),
(17, 21, 13),
(60, 63, 57),
]

In this example the range of list[0] overlaps the range of list[3] AND
list[1] overlaps list[2]

What is the best way to in python to identify the list items that
overlap and the items that don't overlap with any other.

Thanks!
Erik