Add join / merge method

[evyasonov]

Hi
Thank you for this great module
Can you please add a method to join a list of intervals the followin way:

portion.or_join(portion.open(i*10, i*10+1) for i in range(5))

It will be extreamly helpful
Thanks in advance

[AlexandreDecan]

You can already achieve the same result with portion.Interval(*[portion.open(i*10, i*10+1) for i in range(5)]).
More generally, you can rely on the operator module and the reduce function to achieve the same result. For example,

>>> from operator import or_
>>> from functools import reduce
>>> intervals = [portion.open(i*10, i*10+1) for i in range(5)]
>>> result = reduce(or_, intervals)

[evyasonov]

Got it! Thank you for the answer