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2, Data type Like dynamic type programming languages such as Scheme, Ruby, Perl and Tcl, python has a dynamic type system and garbage collection function, which can automatically manage memory usage. Python's built-in basic types mainly include number, bool, string, list, tuple, set, and * * dictionary *. 1. Number Number types in Python 3.x ...

When some projects are mature, there will be a need to automate configuration to generate a completely new project, no need for developers to manually modify the project files, and transfer the configuration work directly to operations and maintenance or the configuration team In fact, it is common practice to just change the target duplicate ...

This blog is based on the single node installation of redis. If you have not installed a single node small partner, please refer to this blog: https://blog.csdn.net/weixin_44422604/article/details/106876756 1, Building a redis cluster (cache cluster) 1. The redis on node1 has been installed. Now, stop ...

Write in front I planned to write a website building tutorial a long time ago. As the end of the term has been delayed until now, the memory of website building has also been blurred because of the test points. However, I try to build a website step by step from 0 and solve the problems. Final results ...

From the principle of java spi in the previous article, we can see that java spi mechanism has the following disadvantages: You can only traverse all implementations and instantiate them all. The configuration file simply lists all the extension implementations without naming them. It makes it di ...

2. redis cluster configuration reference resources: The construction and practice of Redis Cluster Redis cluster construction and simple use 2.1 environment configuration The redis installation package contains redis-trib.rb, which is used to create a cluster and copy the script to / usr/local/bin /. In this way, you can call this comman ...

This article is a series of articles. For those who haven't read the previous episodes, please jab here: Sleuth link tracking of Spring Cloud series (1) Sleuth link tracking of Spring Cloud series (2) This article explains how Sleuth uses elastic search, Logstash, and Kibana to analyze tracking data. 　　 Use ELK to analyze tracking data 　　 ...

Method 1: exhaustively judge whether a number is a prime number Given a number n, starting from 2, we can automatically increase x to determine whether n is divided by X. x can be increased to the square root of N at most, because if there is a value greater than n that can be divided by N, then its quotient must be the value less than the squa ...

Yaml I. Introduction (1) YAML language (pronunciation / ˈ j æ m ə l /) is designed to facilitate human reading and writing. It is essentially a general data serialization format. (2) Basic rules Case sensitive Use indents to represent hierarchy Tab is not allowed when indenting, only spaces are allowed. ...

I. dictionary 1. The function is the same as the list function 2. Use in or not in to determine whether the index exists birthdays = {'Alice': 'Apr 1', 'Bob': 'Dec 12'} 'Alice' in birthdays # True 'Jack' in birthdays # False 3. Use values() to get all values spam = {'color': 'red', 'age': 42} spam # {'red', 42}, you can use for loop travers ...