Casts the provided value as a list if it’s not one.
Use isinstance()
to check if the given value is enumerable and return it by using list()
or encapsulated in a list accordingly.
代码实现
def cast_list(val):
return list(val) if isinstance(val, (tuple, list, set, dict)) else [val]
使用样例
cast_list('foo') # ['foo']
cast_list([1]) # [1]
cast_list(('foo', 'bar')) # ['foo', 'bar']