Tag：Dictionaries
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Time：2021-10-24
1. IntroductionThe dictionary uses a hash table as the underlying implementation. A dictionary contains two hash tables. One HT [0] is used normally, and HT [1] will be used when rehash. A hash table contains multiple hash table nodes, and each hash table node stores a key value pair in the dictionary. The database in […]
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Time：2021-10-19
1. Keyword argument and keyword argument Arguments to Python functionsWhen called(note that when it is not a function definition), parameters are passed in the form of keyword parameters and location parameters. (1) Keyword parameters: Keyword parameters refer to the parameters guided by the identifier (such as name =) or passed in a dictionary guided by […]
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Time：2021-10-16
Functions on tuples Here’s the code The following functions are basically applicable to list #Len: get the length of the tuple t = (1,2,3,4,5) len(t) 5 #Max, Min: maximum and minimum print(max(t)) print(min(t)) 5 1 #Tuple: convert or create tuples l = (1,2,3,4,5) t = tuple(l) print(t) t = tuple() print(t) (1, 2, 3, 4, […]
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Time：2021-10-13
problem To get through a springboardsshLog in to another host and use it every timessh hostIp -l usernameThe method of re entering the password is too time-consuming. You want to fill in the password automatically solve useexpect+bash shellstayssshHost.shEncapsulated in scriptexpectSSH login automatic password filling function useexpectAutomatic password filling function+interactInteractive function take(hostIp, connectionStr)Write the configuration text […]
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Time：2021-10-10
4.1 dictionary data structure Typedef struct Dict {// type specific function dicttype * type; // private data void * privateata; // hash table dictht [2]; // rehash index. When rehash is not in progress, the value is – 1 int rehashidx;} dict; The type is a pointer to the dicttype structure. Each dicttype structure holds […]
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Time：2021-10-9
Module management of front-end spa project based on Vue and Quasar (14) review Through the previous articleDynamic form of front-end spa project practice based on Vue and Quasar (5)The form management function can be realized by zero code through configuration, but all forms are not classified. If there are a large number of forms, it […]
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Time：2021-10-1
Redis’s dictionary uses hash table as the underlying implementation. There can be multiple hash table nodes in a hash table, and each hash node is stored in a key value pair in the dictionary. The hash table used by the redis dictionary is defined by the disht structure. typedef struct dictht{ dictEntry **table;// Hash table […]
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Time：2021-10-1
Tool introduction This paper mainly introduces the function and performance test of zstd tool We call zstandard or zstd a fast lossless compression algorithm, which is a real-time compression scheme for zlib level and better compression ratio. It consists of a very fast entropy phase, provided by huff0 and FSE libraries. This project is a […]
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Time：2021-9-29
Generally speaking, in Python language, data types can be divided into two categories according to whether data types are variable or not. One is variable data type and the other is immutable data type. Whether the data type is changeable refers to whether the data object can be modified directly, not whether the object can […]
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Time：2021-9-29
Numpy supports a large number of dimensional array and matrix operations. It is a python library for array operations. This article is included inMachine learning pre tutorial series。 1、 Python Basics Let’s first consolidate the basics of Python. Python has six standard data types: number, string,List(list), tuple, set, dictionary.Of which:Immutable data: number, string, tuple.Variable data: […]
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Time：2021-9-28
preface: In the network penetration, the website has always been the key target of hackers. Facing the website, attackers often want to find the website background and log in, so as to further obtain the control of the website server. Therefore, how to get the website background login address is a very important first step. […]
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Time：2021-9-26
brief introduction Whether doing scientific computing or writing applications, we need to use some basic data structures, such as lists, tuples, dictionaries and so on. This article will explain these basic data structures in Python in detail. list A list is a list, which can be expressed in square brackets: In [40]: ages = [ […]
