Please follow pep8 conventions for code and comments. Here, put a space between the `#` and the start of the text; use capital letters; use complete sentences. See http://www.python.org/dev/peps/pep-0008/#comments

So this should be `# Provide an iterable json value to start with if the value is null` or something that (a) is a complete sentence and (b) does a better job describing why this line of code exists.