[Python Advanced Tutorial 02] filter function

When you need a magic tool for filtering qualified elements, filter()functions are your right-hand man. filter()A function is a built-in function in Python, which is used to filter elements that meet certain conditions from an iterable object to form a new iterator.

Let's introduce filter()the function in detail:

1. Definition

filter()Functions are used to filter elements in an iterable object according to a specified function (filter condition). It returns an iterator containing elements that satisfy the filter condition.

Two, grammatical form

filter(function, iterable)

• functi