Programmer Group

[SpringBoot WEB series] summary of asynchronous request knowledge points and usage postures In servlet 3.0, asynchronous request support has been introduced, but in actual business development, there are not many children's shoes that may have used this feature? As a literacy and usage tutorial for asynchronous requests, this blog post will ...

IP related statistics Statistics of IP access (number of independent IP access) awk '{print $1}' access.log | sort -n | uniq | wc -l View the IP access of a certain period of time (4-5 points) grep "07/Apr/2017:0[4-5]" access.log | awk '{print $1}' | sort | uniq -c| sort -nr | wc -l View the top 100 IP S with the most frequent access ...

(1) Description Based on the previous one, we use lxml to extract the body content of blog garden essay and save it in Word document. The following modules are used to operate Word documents: pip install python-docx Modified code (mainly added the following paragraph in the while loop of link_crawler()) 1 tree = lxml.html.fromstring(h ...

1. Multprocessing manages processes like threads The multiprocessing module contains an API that is based on the threading API and divides work into multiple processes.In some cases, multiprocessing can replace threading as a temporary replacement to utilize multiple CPU cores, thereby avoiding computing bottlenecks caused by Python global inte ...

subject Detailed analysis of big integer type BigInteger written in C + + Narration Large integer class generally appears in the problem of accuracy in algorithm problems. Although there are large integer classes available in Java, and they are easy to use, we can also understand the implementation of large integer ...

1. Manage concurrent operations in threading processes The threading module provides an API to manage the execution of multiple threads, allowing programs to run multiple operations concurrently in the same process space. 1.1 Thread object The easiest way to use Thread is to instantiate a Thread object with a target function and call start() to ...

It's still the previous chart 1, back end Server verification needs to be performed again before registration Is the user name registered Is the mobile number registered Whether the verification code is wrong Whether the verification code is implemented Password is encrypted with BCrypt Controller layer The method of user name verificatio ...

Let's briefly introduce the collection. Generally speaking, it's a scheme used to store multiple data. For example, we are a company's warehouse management. The company has a lot of goods that need to be managed. There are similar goods and different kinds of goods. In a word, they are many and messy. If we manage the warehouse according to th ...

This is a template problem. Here are two polynomials. Please output the multiplied polynomials. Input format In the first line, two integers nn and mm represent the degree of two polynomials respectively. The second line, n+1n+1 integers, represents the coefficients of the terms from 00 to nn of the first polynomial. The third line m+1m+1 ...

Add: the function cannot change the global immutable variable, and the variable variable can still be changed. l1 = [1,2] def a(l1): l1.pop(1) a(l1) print(l1) generator Generator: the python community regards generator and iterator as the same kind, and the essence of generator is iterator. The only difference is that the generator is ...