What day of the week is a better choice for the fund?[python statistical analysis] - know
A common way of fixed investment of a fund is to apply for a fixed share of the fund from the fund company during a fixed period of time each week or month.Fund fixed investment can average costs, spread risks and achieve automatic investment, so fund fixed investment is also called "lazy investment technique".Today, we mainly use ...
Posted by poknam on Fri, 20 Mar 2020 13:33:49 -0700
Thread & coordination & asynchrony of crawler
Thread pool
from multiprocessing.dummy import Pool
The callback function asynchronously performs some operation on the elements in the iteratable object
Note: callback must have one parameter and only one parameter
Asynchronous is mainly used in time-consuming operations
from multiprocessing.dummy import Pool
pool = Pool(3) # Instantiat ...
Posted by Mirkules on Fri, 20 Mar 2020 10:32:57 -0700
Interface current limit read this one is enough!!!
Guide reading
A few days ago, I discussed with a friend about their company's system problems, traditional single application and cluster deployment. He said that there might be a risk of instantaneous increase in the concurrent volume of services in the near future. Although the cluster is deployed, the request delay is still very large after ...
Posted by PHP Newb on Fri, 20 Mar 2020 05:58:58 -0700
How to detect DIV size change?
I have the following example html, which has a DIV with a width of 100%.It contains some elements.Internal elements may be repositioned and div sizes may change when executing window resizing.I asked if it was possible to hook up div size change events?And how do you do that?I currently bind the callback function to the jQuery resize event on ...
Posted by Thumper on Fri, 20 Mar 2020 01:11:22 -0700
Player nickname generator の implementation C++
When we register the game, some user name games can be generated automatically. Let's take you to realize this function
Train of thought:
Use several containers to store many strings, and then use random numbers to call TA S
Here we use the string array, which is the code:
cout<<Where[rand()]<<"Of"<<Describe[rand()]< ...
Posted by SP8600 on Thu, 19 Mar 2020 11:23:38 -0700
Using Python to compile py into. so files
objective
Compile the python 3 code into a pyd file to protect the code. (Note: only a single py file can generate a single pyd file, which is pyd in windows and so in linux.)
Find a related blog on the Internet Using Python to compile py into. so files , from the introduction, environment, precautions, code steps, the comments are very detaile ...
Posted by Yucky on Thu, 19 Mar 2020 08:53:59 -0700
The operation of Day8 flie
File operation
Open the file 2. Operate on the file handle 3. Close the file.
open() has three parameters: 1. File path (folder path + file name + file type); 2. encoding mode; 3. Mode
fl = open('d:\python.txt',encoding='utf-8',mode='r') #d:\python.txt is a TXT file named Python under my disk D. when I write this file, I write it with subli ...
Posted by cfemocha on Wed, 18 Mar 2020 09:15:56 -0700
Coroutine application example: timer expiration event response
Application instance of collaboration: timer expiration event response
order
1. Time scheduling center
2. Event handling based on cooperation process
order
. Its event re ...
Posted by shaunno2007 on Mon, 16 Mar 2020 22:15:30 -0700
ffplay -- source code analysis: code architecture
/* Minimum SDL audio buffer size, in samples. */
// Minimum audio buffer
#define SDL_AUDIO_MIN_BUFFER_SIZE 512
/* Calculate actual buffer size keeping in mind not cause too frequent audio callbacks */
// To calculate the actual audio buffer size, you do not need to call back too often. The maximum numb ...
Posted by swatisonee on Sun, 15 Mar 2020 04:47:17 -0700
Open () and close () windows in JavaScript
close() closes the window, the grammar is written as follows, and then close() closes the window while opening a new one, so you can't see the open window
1 window.close(); //Close this window
2 <Window Object>.close();//Close the specified window
Code Display:
1 <!DOCTYPE html>
2 <html>
3 <head>
4 <meta c ...
Posted by thewitt on Sat, 14 Mar 2020 09:46:47 -0700