excuse me, I have a User serialization class. The model used in the class is set owner = models.ForeignKey ( auth.User , related_name= snippets ) in the User,Snippet model. Performing database migration does not report an error, but there is no such...
how to make use of multi-core and how to think about it ...
this is a basic random walk problem. according to the contents of the book, I try to find indexes on axis=1 whose absolute value is greater than or equal to 7, but there are always several rows whose index is 0, and the index entered normally is fine....
1. Py2.7,flask framework used by the development environment in pycharm, 2. During development, you create the flask project directly in pycharm code as follows: 3. The phenomenon is that the port is specified or the ip is set together with the port ...
in the process of learning the python socket module, I wrote a simple server to receive information. I used socke.recv (10) to receive a long string through a loop and put all the data together, but I couldn t quit the while loop. Please help me. < hr...
I followed the online tutorials to the root directory and typed the command vim .bash _ profile to look like this? have you ever met a boss? What exactly is the problem? ...
S1 = the sun is setting along the mountains, and the Yellow River flows eastward toward the sea. if you want to see the scenery of thousands of miles, please climb another tall building. S2 = If we don t have the guts to try anything, what s the...
api: http: api.bilibili.com x web. there are already 70w aid, in the library every morning to get video playback updates by aid , and then there is a sudden problem in the early hours of this morning. Every time we get 200,300 pieces of data, there w...
use the requests proxy module and do not change the ip address after success < hr > Code: import requests from bs4 import BeautifulSoup url=r http: ip.chinaz.com proxy={ http : http: 177.130.55.164:20183 , https : https: 177.1...
enter the jupyter notebook error message in the console after installing jupyter as follows: C: Users Administrator>jupyter notebook Traceback (most recent call last): File "c: python27 lib runpy.py", line 174, in _run_module_as_mai...
I set the crawler to run every 6 hours, and it did. The problem with is that it runs immediately after each point starts, and then executes every 6 hours. how do you stop it from running at the start of the point? ! @web Oh, it s all right. Jus...
We know that there are good ways to localize data such as localStorage,sessionStorage in HTML5. So what are some convenient ways to localize data in Django? ...
now there is a problem in the project. The project is completed in flask. Now there are several data tables with the same order field, and all need to query the data of these tables and adjust the value of the order field. the inefficient way is to im...
Python version: 2.7 now you need to use tornado to implement a function like this: 1. Create multiple processes using tornado. 2. The method of reading configuration information from the database is written in the process, and the read configurat...
for example, at present, all pixel values of the image can only be obtained by traversing the loop: image = Image.open( test.png ) width = image.width height = image.height image_list = [] for x in range(height): scanline_list = [] for y in r...
request different pages, sptoken is constantly changing ...
if you use locateOnScreen according to the example, the None, image is returned as the downloaded image, as follows : according to the example, a coordinate should be put back, and if it is not identified, it should be returned to the None. But h...
ds = Dataset.from_tensor_slices ((features,targets)) as shown in the above figure code, what is the function of double parentheses ...
I want to write a set of dns bind management interface with python, so that there is no need to type commands on the console for domain name resolution. Knowing that bind has a DLZ that can connect to the database, put the parsing record into the DB, so ...
the purpose is to get the text selected by the mouse through the Tkinter Text control the reference code is as follows: https: stackoverflow.com que. part of my code: the whole is encapsulated in a class self.Scrolledtext1 = ScrolledText(top) ...
want to achieve the following effect: <script src="http: www.jq22.com jquery vue.min.js">< script> <script src="http: libs.baidu.com jquery 1.10.2 jquery.min.js">< script> <link rel="stylesheet&qu...
simulate a scenario: A single-node backup of MongoDB is done at 11:00, and the backup ends at 11:10, and the backup data at this time is 11:10. accidentally delete data at 11:20 in this case, we can restore the data to 11:10 through the backup data ...
look at the picture first I obviously installed 4.7.1, but opened a 4.6.2 project and downgraded me to 4.6.1. what s going on? Can t a higher version of the framework develop a lower version of the project? ...
if you write your own class, you can understand how to inject it, but how to inject a class that comes with java, such as File File file = new File (filePath) like this? and what if the filePath is calculated while the program is running? this is j...
because the project routes are all dynamically infected by the back end, the local route storage is not done, addRoute is dynamically mounted, and then lazy loading is used. how should I configure so that lazy loading is not used in the developme...