Python Collections (Arrays):

Set — List — Tuple — Dictionary
(SLTD)

Duplicates allowed / Ordered / Indexing / Mutable
(DOIM)

---

Set	{ } / (( ))	DOIM_NO
List	[ ]	DOIM
Tuple	(, )	DOI, mutable_NO
Dictionary	{ key : value }	DO, mutable_YES

---