qspec.check_iterable  (  arg ,  dtype = 'str'  )[source]

Parameters:

argAny

The argument that is checked.

dtypetype

The type that has to be matched by the elements of arg or arg itself.

Returns:

outlist

'arg' as a list if it is a 'list', 'tuple' or 'set' of values of type 'dtype', a list of the single element 'arg' if it is of type 'dtype' and else an empty list.