[enh] parse tuples \o/
[enh] parse empty list
[enh] parse list of one item
[fix] handle comma correctly
[enh] parse list of arbitraty size \o/
[enh] parse empty dict
[mod] refactor tuple, handle empty case in testlist_comp
[enh] parse dict with one item
[mod] refactoring, uniq way to create comma
[enh] parse dicts