30-seconds-of-code/snippets/cast-list.md

title, tags, cover, firstSeen, lastUpdated

title	tags	cover	firstSeen	lastUpdated
Cast to list	list	colorful-pots	2019-08-20T12:47:43+03:00	2020-11-02T19:27:07+02:00

Casts the provided value as a list if it's not one.

• Use isinstance() to check if the given value is enumerable.
• Return it by using list() or encapsulated in a list accordingly.

def cast_list(val):
  return list(val) if isinstance(val, (tuple, list, set, dict)) else [val]

cast_list('foo') # ['foo']
cast_list([1]) # [1]
cast_list(('foo', 'bar')) # ['foo', 'bar']