ensure_iterable

lsst.utils.iteration.ensure_iterable(a: Any) → Iterable[Any]

Ensure that the input is iterable.

There are multiple cases, when the input is:

• iterable, but not a str or Mapping -> iterate over elements (e.g. [i for i in a])
• a str -> return single element iterable (e.g. [a])
• a Mapping -> return single element iterable
• not iterable -> return single element iterable (e.g. [a]).

Parameters:

a : iterable or str or not iterable

Argument to be converted to an iterable.

Returns:

i : generator

Iterable version of the input value.