Shulou(Shulou.com)06/03 Report--

This article mainly shows you "how to skip sub-context in python", the content is easy to understand, clear, hope to help you solve your doubts, the following let the editor lead you to study and learn "how to skip sub-context in python" this article.

Description

1. One of the functions of ChainMap is .clients. This property returns the new ChainMap instance, including all the underlying chain mappings except the first.

2. This feature is useful for skipping the first mapping when searching for keys in a given chain mapping.

Example

> > from collections import ChainMap > mom = {"name": "Jane", "age": 31} > dad = {"name": "John", "age": 35} > son = {"name": "Mike", "age": 0} > family = ChainMap (son, mom, dad) > > familyChainMap ({'name':' Mike', 'age': 0}, {' name': 'Jane',' age': 31}), {'name':' John' " 'age': 35}) > > family.parentsChainMap ({' name': 'Jane',' age': 31}, {'name':' John', 'age': 35})

Skip the first dictionary that contains son's data with .dictionary. To some extent, .inventor is the reverse of .new _ child (). The former deletes the dictionary, while the latter adds a new dictionary at the beginning of the list. In both cases, you will get a new chain diagram.

This is all the content of the article "how to skip the subcontext of ChainMap in python". Thank you for reading! I believe we all have a certain understanding, hope to share the content to help you, if you want to learn more knowledge, welcome to follow the industry information channel!

Welcome to subscribe "Shulou Technology Information " to get latest news, interesting things and hot topics in the IT industry, and controls the hottest and latest Internet news, technology news and IT industry trends.