Python basics-------How to filter data based on criteria in a list dictionary collection

How to filter data by criteria in a list Dictionary collection: list

Generate a random list to filter out negative numbers first

1, normal for loop iteration judgment

2,filter () function judgment, filter (function, list|tuple|string)

1 filter (lambda x:x>0, data)

3, List push-down

4, efficiency comparison: Or the list deduction is slightly higher

Two: Dictionary

1, similar to the list, derived type

Mister into a random dictionary (key from 1-20)

Filter out value is a negative number

Three: Collection

Randomly generate a collection of 10 elements

Filter out elements less than 0, similar to dictionaries

Python basics-------How to filter data based on criteria in a list dictionary collection