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) ...
how to do it in this component, or how to write it in vuex, put it in which part of mutations,getters,actions ...
Layabox development, the IOS WeChat end displays normally, the PC side displays normally, only Android Wechat white screen, but the html tag can be seen, only canvas is white. then use the Android chrome to open it again. finally locates to a normal p...
I hope that by setting up the ajax request, the ajax request can carry the cookie information. I will add as I said online. beforeSend: function(xhr) { xhr.withCredentials = true; } refer to https: www.cnblogs.com hello.; the...
there is a scenario where I released the npm package and found that the document was not well written and reperfected readme. At this time, I have to update the documents on the official website, in order to successfully release, I have to upgrade npm v...
{{d.gid ==1 ? layui-badge : layui-badge layui-bg-blue }} how to write if elseif else? with ternary expressions the effect should be as follows if(d.gid == 1) { layui-badge }elseif(d.gid == 2){ layui-badge layui-bg-blue }elseif(d...