What's the difference between () vs [] vs {}?

Question

What\'s the difference between () vs [] vs {} in Python?
They\'re collections? How can I tell when to use which?

Answer 1

• () is a tuple: An immutable collection of values, usually (but not necessarily) of different types.
• [] is a list: A mutable collection of values, usually (but not necessarily) of the same type.
• {} is a dict: Use a dictionary for key value pairs.

For the difference between lists and tuples see here. See also:

• Python Tuples are Not Just Constant Lists