How can I replace a text delimited string list item with multiple list items in a python list?

Question

Given a list:

mylist = [\'dog\', \'cat\', \'mouse_bear\', \'lion_tiger_rabbit\', \'ant\']

I\'d like a one-liner to return a new list:

Answer 1

This is not a one liner, but is nevertheless a valid option to consider if you want to return a generator:

def yield_underscore_split(lst):
     for x in lst:
         yield from x.split('_')

>>> list(yield_underscore_split(mylist))
['dog', 'cat', 'mouse', 'bear', 'lion', 'tiger', 'rabbit', 'ant']

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Original answer valid only for versions Python 3.3-3.7, kept here for interested readers. Do not use!

>>> list([(yield from x.split('_')) for x in l]) 
['dog', 'cat', 'mouse', 'bear', 'lion', 'tiger', 'rabbit', 'ant']