Programmer Think

Last weekend, we received a 1200 order. The customer service took a 10% commission and got 1000. It was completed in two hours. I was very happy. In fact, there are not many such orders. The technical difficulty is low, but the price is high. We commonly call them "fish picking list". Thinking of making money, I invited the goddess to ...

From fluent Python Chapter 7 function decorators and closures Use functools lru_ Cache notes functools.lru_cache is a very useful decorator. It implements the function of memo. This is an optimization technology, which saves the results of time-consuming functions to avoid double calculation by passing in the same parameters clockdeco.p ...

(I) pandas Foundation 1, Introduction to pandas Python Data Analysis Library Pandas is a tool based on NumPy, which was created to solve the task of data analysis. Pandas incorporates a large number of libraries and some standard data models, providing the tools needed to operate large structured data sets efficiently. 2, pandas core data s ...

nonebot2 installation and use Write in front This article is suitable for beginners who have just come into contact with bot Welcome friends who like fate 2 and are interested in qq group bot to join us [fate 2 linkage bot development group]: 924026546 This article is also posted on personal blog: here Advance preparation A computer (nonsen ...

Drawing new year animals is actually a very brain intensive and troublesome thing - especially when the coordinates, line length and other parameters have not been determined. I risked losing all my hair and drew a new year beast (??) (as shown below) The Chinese New Year is coming soon. I wish you an early New Year ~ hey hey, I wish you all w ...

I hope to take notes to record what I have learned, and I hope it can help the same beginner. I also hope that the big guys can help correct the error ~ infringement legislation and deletion. catalogue 1, Concepts of bidirectional linked list and bidirectional circular linked list 2, Implementation of bidirectional linked list 1. Create nod ...

Welcome to pay attention "Python black technology" series , continuously updating Welcome to pay attention "Python black technology" series , continuously updating If the crawler doesn't use the user agent browser header, many websites can't climb basically, Using the browser head to disguise the real user crawl ...

Request and response request Request construction Start line + request header + request body HTTP request method The page information specified by the GET request returns the entity subjectHEAD is similar to get request. There is no specific content in the return response. It is generally used to debug and obtain the message header**POST s ...

Title 38 For a given tuple (1, 2, 3, 4, 5, 6, 7, 8, 9, 10), write a program to print the first half value in one line and the last half value in one line. code implementation Method 1: use the loop to output the tuple data tpl = (1,2,3,4,5,6,7,8,9,10) for i in range(0,5): print(tpl[i],end= ' ') print() for i in range(5,10): print(t ...

Multiple Features Multiple linear regression, which includes multiple variables, such as house age, area, number of rooms, etc., is marked as follows: Suppose the function becomes: It can be understood as: θ 0 means base price θ 1 is the price per square meter, and X1 is the number of square meters θ 2 is the price of each ...