Matrix decomposition notes sorting
catalogue
preface
1, Examples
2, Steps
1. Construct Loss function
2. Partial derivative
3. Matrix multiplication
4. Gradient descent
5. Regularization
6. The code is as follows:
preface
Matrix decomposition can be used to calculate the predicted value and so on, which is very important, so next I will sort out ...
Posted by JD^ on Mon, 10 Jan 2022 12:30:23 +0100
python crawls 4K ultra clear picture quality mobile phone wallpaper. Of course, the more wallpapers, the better~
preface
Everyone is familiar with mobile phone wallpaper. I believe whoever turns on his mobile phone wants his wallpaper to be his favorite picture,
But when a wallpaper is used for a long time, it will want to change a picture full of freshness (excluding those who love it),
However, the time of selecting pictures is always constant. Some ...
Posted by jacko310592 on Mon, 10 Jan 2022 11:21:05 +0100
Python multitasking process
Python multitasking process
What is a process
Process: it is the basic unit of resource allocation. When a program starts running, it is a process, including the running program and the memory and system resources used by the program. CPU allocates CUP processing time for processes in the form of time slices.
A process is composed of multiple t ...
Posted by fitzromeo on Mon, 10 Jan 2022 10:39:52 +0100
Fundamentals of Python
iteration1.1 concept of iterationThe process of using the for loop to traverse the value is called iteration. For example, the process of using the for loop to traverse the list to obtain the valuefor value in [2, 3, 4]:
print(value)1.2 iteratable objectsStandard concept: defined in class__ iter__ Method, and the object created using this c ...
Posted by rejoice on Mon, 10 Jan 2022 09:29:21 +0100
python function shape parameter, argument, keyward only, positional only, deconstruction, return value
Python functions
function
Mathematical definition
y=f(x), y is a function of X and X is an independent variable. y=f(x0, x1, ..., xn)
Python functions
It is composed of statement block, function name and parameter list composed of several statements. It is the smallest unit of organizing code
Complete certain functions
Function function ...
Posted by ym_chaitu on Mon, 10 Jan 2022 04:34:09 +0100
Python crawler (mainly the scratch framework)
1, IP proxy pool (relatively simple, subsequent updates)
Two protocols are used to verify ip and proxies, http and https
import re
import requests
url = 'https://tool.lu/ip'
headers = {
'User-Agent': 'Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/96.0.4664.110 Safari/537.36 Edg/96.0.1054.62'
}
...
Posted by smilepak on Mon, 10 Jan 2022 04:30:43 +0100
[JS reverse hundred examples] infinite debugger and data dynamic encryption analysis of an air quality monitoring platform
Focus on official account dry cargo WeChat public: K brother crawler, keep sharing crawler advance, JS/ Android reverse technology dry goods!
statement
All contents in this article are for learning and communication only. The packet capturing content, sensitive website and data interface have been desensitized. It is strictly p ...
Posted by sherrilljjj on Mon, 10 Jan 2022 03:20:19 +0100
Packet capture analysis and application of 91 short video encryption algorithm
Target APP: 91 short videoI posted an article before Ant accelerator brush invitation According to the article, this APP is basically the same as the encryption algorithm of ant accelerator. It is not available for download.0x00 tool preparationFiddler (agent capture)Xposed (hook framework)Inspeckage (universal hook plug-in, optional) Algorithm ...
Posted by Magicman0022 on Mon, 10 Jan 2022 03:03:36 +0100
Scrapy framework quickly crawls the data storage of embarrassing encyclopedia and crawls multiple pages [advanced introduction to python crawler] (17)
Hello, I'm brother Manon Feige. Thank you for reading this article. Welcome to one click three times. 😁 1. Take a stroll around the community. There are benefits and surprises every week. Manon Feige community, leap plan 💪🏻 2. Python basic column, basic knowledge, 9.9 yuan can't afford to lose, and can't be fooled. Python from introduction ...
Posted by nicky77uk1 on Mon, 10 Jan 2022 01:27:15 +0100
[Python code debugging version] here comes daughter love: quietly ask the holy monk, is your daughter beautiful? (great for my Python)
preface
”If there is an afterlife, long songs sing in pairs, the beauty snuggles up beside her, thin clothes and long years. “
When I was young, I always liked to see the clips of subduing demons and eliminating demons in journey to the West. I looked forward to it.
The four masters and disciples were able ...
Posted by kitcorsa on Mon, 10 Jan 2022 00:09:01 +0100