Python generator iterator and Iterable object

1 Iterable Object

List, dict, set, tuple, file (iterate on each line) are Iterable object, but they are not iterator. But they can be converted into iterator, in two ways:

First, explicit use of the ITER () function;

Second, implicitly using the for

2 iterator

Iterator is also a iterable.

3 Generator

3.1 Kinds

There are two types of generators

3.2 Generator using yield to return the form of a function

A function that uses yield to return function values is Generator,generator is a special kind of iterator, so a function that takes iterator as a parameter can use generator.

3.3 Using generator comprehension form of generator

That is, the generator comprehension essence of the form of parentheses is a generator.

To summarize,

The relationship between the three is as follows:

Generator is Iterator,iterator is Iterable object, so the largest is the Iterable object.

Python generator iterator and Iterable object