30-seconds-of-code/snippets/cast_list.md

title, tags

title	tags
cast_list	utility,list,beginner

Casts the provided value as an array if it's not one.

Use isinstance() to check if the given value is a list and return it as-is or encapsulated in a list accordingly.

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

cast_list('foo'); # ['foo']
cast_list([1]); # [1]