Py07-python Foundation-Collection

Source: Internet
Author: User

1. Collection

Function: relational operation, de-weight

Definition: A collection of different elements, which is a set of values of an unordered array of immutable types.

A collection can be a string, a number, not a list or a dictionary.

The purpose of a collection is to store different values together, and to do relational operations between different sets, without having to dwell on a single value in the collection.

How to define: {}

s={1,2}print(s)print(type (s))
s={'a', 2,'b', 1}print(s)  Print(type (s))

Py07-python Foundation-Collection

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