Updating python sets using list comprehension

Python Sets are a group of items provided within {}. See below how to update python sets. We can do conditional updates as well.

import datetime

numset = {5, 10, 20, 30, 40}
updatedset = {num+100 for num in numset if num > 15}.union({num for num in numset if num <= 15})
print(updatedset)

strset = {'James', 'Rory', 'Kevin'}
updatedset = {st + " Associate" for st in strset if (st == 'Rory' or st == 'Kevin')}.union(
            {st for st in strset if (not(st == 'Rory' or st == 'Kevin'))})
print(updatedset)

dateset = {'2021/1/2', '2021/1/10', '2022/4/1', '2022/10/2'}
#Convert string dates to datetime objects
dtset = {datetime.datetime.strptime(dt, '%Y/%m/%d') for dt in dateset}
#Add 30 days, if year is 2022
updatedset = {dt + datetime.timedelta(days=30) for dt in dtset }
#Convert datetime to strring dates, if needed
strdates = {datetime.datetime.strftime(dt1, '%Y/%m/%d')  for dt1 in updatedset}
print(strdates)

Outputs:

{
	130, 5, 120, 10, 140
}

{
	'Kevin Associate', 'Rory Associate', 'James'
}

{
	'2021/02/01', '2021/02/09', '2022/05/01', '2022/11/01'
}

Note that, if we apply a filter condition to sets, only the items matching the condition will be returned as the new set.
To display the complete set, we will have to do a union as in above samples.