LeetCode 232 uses a stack to implement a queue, 225 uses a queue to implement a stack

232. Implement a queue with a stack topic: Please use only two stacks to implement a first-in-first-out queue. The queue should support all operations supported by general queues (push, pop, peek, empty): Implement the MyQueue class: void push(int x) pushes element x to the end of the queueint pop() removes and returns an element from t ...

Posted by planethax on Wed, 16 Nov 2022 02:28:04 +0300

python function 2_ variable scope, function parameters (positional parameters, keyword parameters, default parameters, variable length positional parameters, variable length keyword parameters), unpacking, reference

I wrote a function before, there should be a total of 3 articles about the function, and I will post it here when I write it 0. Content variable scopeMulti-Function Program Execution Flowfunction return valuefunction parametersUnpack and swap the values ​​of two variablesquotemutable and immutable types 1. Variable scope The variable sc ...

Posted by m4x3vo on Mon, 14 Nov 2022 22:48:37 +0300

Python massive data generation and processing

Article directoryPython massive data generation and processingOverviewGenerate 100 million pieces of datadirect read testDownload DataView the occupied memory size:Determine the maximum number of repetitionsGenerate 1 billion pieces of datadirect read testDownload DataLoad data in chunksLoad statistics for each blockGet the value of the number ...

Posted by fleabay on Sat, 12 Nov 2022 14:57:48 +0300

Dictionary name [key name] = new value Modify the value of the dictionary

37. Dictionary name [key name] = new value Modify the value of the dictionary 1. Mutability of dictionaries Strings and tuples are immutable data types. Lists and dictionaries are mutable. Variable means that it can be changed, that is, elements can be added to lists and dictionaries, and existing elements can be deleted and modified. ...

Posted by buzzby on Mon, 24 Oct 2022 07:07:08 +0300

[NovelAI] Deploying AI drawing robots in QQ groups

Table of contents 1. NovelAI 2. UIautomation and pywin32 3. Code 1. AI drawing related 2. QQ group news capture related Fourth, the code effect Five, afterword 1. NovelAI NovelAI is an open source algorithm for drawing two-dimensional pictures. See the deployment method. b station link 2. UIautomation and pywin32 UIautomat ...

Posted by ksteuber on Fri, 14 Oct 2022 05:57:11 +0300

python-based method to copy the corresponding information in an excel file to another out of order excel

foreword I wanted to write this because I received a task from the teacher today. The teacher gave me two folders. One of the folders has the candidates’ scores and candidates’ names, and the other has the candidates’ names, but they are out of order. What I have to do is to write the scores of these people into a new exc ...

Posted by Orkan on Wed, 12 Oct 2022 01:26:16 +0300

Teen python Series 10. Strings

Teenager python Series Directory - Old Programmer's Blog - CSDN Blog Teenager python teaching video ppt source code Introduction In Python, the text enclosed in quotation marks is a string, and the string can also be saved in a variable for use. If the text in the string contains double quotes, you can enclose the string in single quote ...

Posted by squallm1 on Sun, 09 Oct 2022 22:43:30 +0300

Eight Python automation scripts to improve work efficiency and make fishing happier

Hello ~ Hello everyone, I'm Madoka When we work ~ often do some repetitive things For example: reading news, sending emails, checking the weather, cleaning folders, etc. Is there any way to shorten or even cancel the time to do these things? Of course there is! ! That is to use an automated script to pull~ This saves us having to do t ...

Posted by mannyee on Sat, 08 Oct 2022 00:33:39 +0300

Python Basics | Numpy Detailed Tutorial

⭐This column aims to explain the basic grammar of Python in detail, summarize the key points in the grammar, and explain the difficulties in detail. It is aimed at zero-based and entry-level learners. Through the study of the column, you can master python programming proficiently, and at the same time, it will be used for subsequent data analy ...

Posted by yacaph on Thu, 06 Oct 2022 09:53:22 +0300

Machine learning grid search parameters sklearn

grid search Grid Search GridSearchCV We have two ways to select hyperparameters: 1. Based on experience; 2. Select parameters of different sizes, bring them into the model, and select the parameters with the best performance. When selecting hyperparameters through Path 2, the cost of manual manual adjustment of attention is too high to be wort ...

Posted by AudiS2 on Wed, 05 Oct 2022 02:18:52 +0300