Basic process of logistic regression and actual combat of iris project
1, Basic process of logistic regression
1. Logistic regression
Learn the law from multiple eigenvalues of a group of samples, establish a model (the learning model is abstracted as a formula f(x)), and use this model to predict the results of other samples. Logistic regression is to classify the prediction results.
Logistic regression steps:
(1 ...
Posted by McMaster on Sun, 22 May 2022 15:13:52 +0300
python regular expression re module
'''regular expression regular expressionRegular expression is a special character sequence, which can be understood as a stringBut this string is stronger than the original stringRegular expression usage scenario:Special characters are not allowed when registering and setting passwords. What are the number of passwordsWhen crawling, use regular ...
Posted by nomad9 on Sun, 22 May 2022 11:47:14 +0300
socketserver and hashlib verification in Python
One, socketserver
The bottom layer of the network protocol is the socket, which is based on the socket module and encapsulated with another layer, which is the socketserver. The socketserver is to realize the concurrency of the tcp protocol on the server side.
1. Basic writing
server side writing:
# Server
#import socket module
import sockets ...
Posted by rick007 on Sun, 22 May 2022 08:34:13 +0300
The use of pytest_addoption in pytest
illustrate
In daily UI automation testing, multiple scenarios may be used, such as testing, pre-release, and production environments, which requires us to switch environments. If we need to specify different system configurations in different environments, each modification The framework code configuration is very unautomated and cause ...
Posted by mj99 on Sun, 22 May 2022 07:47:33 +0300
Python Github automatic login, Github open source project analysis
I. Introduction
Github source link: https://github.com/Python3WebSpider/GithubLogin
Cui Qingcai: https://cuiqingcai.com/8229.html
When it comes to automatic login, using selenium is the most suitable, and I have actually fought several times before. Let's try to construct a post form and log in with a post request.
2. Analysis
) login process
B ...
Posted by computerzworld on Sat, 21 May 2022 20:30:28 +0300
Django e-commerce function
Django e-commerce function
1, Order
Order logic
Login users can browse products
The product details page purchases immediately and generates an order. The order status is unpaid
Add goods to the shopping cart, view the shopping cart, select the specified goods, purchase immediately and generate an order. The order status is unpaid
Settle the ...
Posted by akkad on Sat, 21 May 2022 18:27:21 +0300
Sword finger offer special exercise
Continuously updating
1. Search in two-dimensional array
Problem: in a two-dimensional array (each one-dimensional array has the same length), each row is sorted in ascending order from left to right, and each column is sorted in ascending order from top to bottom. Please complete a function, input such a two-dimensional array and an integer, ...
Posted by doreg28 on Sat, 21 May 2022 13:16:46 +0300
Some personal understanding of Python decorator
Decorator
It is essentially a function that accepts parameters as functions.
Function: add additional general functions to an implemented method, such as logging, running timing, etc.
give an example
Decorator without parameters, No@
# Decorator without parameters
def deco_test(func):
def wrapper(*args, **kwargs):
print("before fu ...
Posted by computerbum on Sat, 21 May 2022 11:19:33 +0300
Three characteristics of object-oriented language: encapsulation, inheritance, polymorphism -- encapsulation
1. What is encapsulation?
In a program, encapsulation is an abstraction of a concrete object
To put it simply: hide some parts (privatize), and you can't see other parts of the program (there's no way to call them directly)
Privatization: privatize the features or some methods in the class so that they cannot be used directly by the outside
2 ...
Posted by stry_cat on Sat, 21 May 2022 09:49:33 +0300
SVD and CUR self summary
SVD and CUR self summary
reference resources: https://www.cnblogs.com/endlesscoding/p/10033527.html https://blog.csdn.net/WangWeb1998/article/details/114376298
1. SVD (singular value decomposition)
definition: There is one
m
×
n
...
Posted by shruti on Sat, 21 May 2022 02:38:13 +0300