Quantsrat lets R language perform strategic backtracking and quantitative trading like Python

Using the Quantsrat package Quantsrat s are used to build strategies, add metrics, generate signals, generate buying and selling rules, and so on.The results are similar to Python quantification platforms like premium mines, ten thousand mines, and baskets.Because CRAN cannot be installed online, there are still some pits in the installation pr ...

Posted on Sat, 22 Feb 2020 11:28:59 -0500 by chaiwei

14, Learning Scrapy of distributed Crawlers

Scrapy framework Learning objectives Understand the skeleton. Learn how to write spider crawlers. Learn how to write Crawlspider. Learn how to write middleware. Learn pipeline to save data. Learn to use Scrapy with selenium. Learn to use IP proxy in scratch.Introduction to the Scrapy frameworkInstall ...

Posted on Sat, 22 Feb 2020 11:06:49 -0500 by Ludichrist

Reprint uses Python to write a small program to walk the maze (graphical: matplotlib,dfs,prim)

Respect Reprint: Graphing: matplotlib,dfs,prim Github: https://github.com/Radium1209/Maze First look at the dynamic rendering (slow down):   First generate maze: Two algorithms are used: Prim and dfs Conclusion: Prim generates a real maze, so Prim is used to generate maze by default Specific ...

Posted on Sat, 22 Feb 2020 09:55:38 -0500 by xwishmasterx

Build Ethereum private chain (Windows)

The purpose of building private chain: public network main chain can be used in blockchain development, but it will cause unnecessary money waste. Doing anything on the Ethereum chain consumes gas. So for experimental development, we usually do experiments on our own private chain. Geth client download Download address on official website: ...

Posted on Sat, 22 Feb 2020 08:02:42 -0500 by a-mo

Implementation of four maze generation algorithms in Python Reprint: graphic display implementation

Respect for originality: python maze generation algorithm: graphic display implementation Introduction to maze graphic display Code introduction GameSearch.py Complete code Introduction to maze graphic display pygame is used to make A graphic display of four maze algorithms, as shown in the fig ...

Posted on Sat, 22 Feb 2020 05:56:32 -0500 by manwhoeatsrats

HTML+JS+CSS to realize student information management system

HTML+JS+CSS to realize student information management system Effect page increase Delete change check Page turning Code difficulty Difficulty 1 Difficulty 2 Difficulty 3 Difficulty 4 epilogue Effect If you don't speak much, you can directly see the effect. This code is complex. I hope you ca ...

Posted on Fri, 21 Feb 2020 10:23:27 -0500 by Copernicus

Runtime objc4-756.2 analysis of the source code relationship between class RO and class RW in objc class

First source code struct objc_class : objc_object { // Class ISA; Class superclass; cache_t cache; // formerly cache pointer and vtable class_data_bits_t bits; // class_rw_t * plus custom rr/alloc flags class_rw_t *data() { return bits.data(); } ....(H ...

Posted on Fri, 21 Feb 2020 04:41:17 -0500 by deft

Asynchronous concurrency tool: a practice of using CompletionService to improve system performance in actual projects

scene With the development of Internet application, many traditional industries also need access to the Internet. The same is true of our company. The insurance core needs to be connected with many insurance intermediaries, such as Alibaba, JD, etc. These companies have some relatively high requirements for the performance of interface services ...

Posted on Thu, 20 Feb 2020 05:48:54 -0500 by g0liatH

Fight against new coronavirus: a balanced analysis of national cure and new cases

# default_exp china # The above line is used to declare the name of this module in nbdev. Must be the first row of the first Cell of the notebook. china_balance Description: fight against new coronavirus (7) - Analysis of the balance between national cure and new cases. Function: load the data/china.csv file for drawing output and anal ...

Posted on Wed, 19 Feb 2020 13:15:43 -0500 by itpvision

ZABBIX docking flight book for alarm notification

Flybook provides a rich api for message notification, including text messages, picture messages, rich text messages. This introduction uses Flybook api to send text messages, the following is the implementation ideasFlying Book API address: https://open.feishu.cn/document/ukTMukTMukTM/uITNz4iM1MjLyUzM Ideas for implementation 1. Three authoriz ...

Posted on Wed, 19 Feb 2020 12:25:15 -0500 by moe