() - tuple
A tuple is a sequence of items that can't be changed (immutable).
[] - list
A list is a sequence of items that can be changed (mutable).
{} - dictionary or set
A dictionary is a list of key-value pairs, with unique keys (mutable). From Python 2.7/3.1, {}
can also represent a set of unique values (mutable).
与恶龙缠斗过久,自身亦成为恶龙;凝视深渊过久,深渊将回以凝视…