大约有 40,000 项符合查询结果(耗时:0.0420秒) [XML]

https://stackoverflow.com/ques... 

In Django, how do I check if a user is in a certain group?

...add(group) # user is now in the "Editor" group then user.groups.all() returns [<Group: Editor>]. Alternatively, and more directly, you can check if a a user is in a group by: if django_user.groups.filter(name = groupname).exists(): ... Note that groupname can also be the ac...
https://stackoverflow.com/ques... 

Objective-C categories in static library

...roject as direct dependency (target -> general -> direct dependencies) and all works OK, but categories. A category defined in static library is not working in app. ...
https://stackoverflow.com/ques... 

Rank function in MySQL

... (SELECT @curRank := 0) r ORDER BY age; The (SELECT @curRank := 0) part allows the variable initialization without requiring a separate SET command. Test case: CREATE TABLE person (id int, first_name varchar(20), age int, gender char(1)); INSERT INTO person VALUES (1, 'Bob', 25, 'M'); INSERT I...
https://stackoverflow.com/ques... 

Django in / not in query

...e(); Tbl2.objects.filter(id__in=IDs') This did not work because IDs is actually a QuerySet object. When I deleted the rows it originated from, it no longer worked with other queries. The solution is Tbl2.objects.filter(id__in=list(IDs)) -- turn it into a list – Dakusan ...
https://stackoverflow.com/ques... 

Convert string to symbol-able in ruby

Symbols are usually represented as such 7 Answers 7 ...
https://stackoverflow.com/ques... 

What's the proper way to install pip, virtualenv, and distribute for Python?

...estion 4314376 , I recommended using ez_setup so that you could then install pip and virtualenv as follows: 15 Answer...
https://stackoverflow.com/ques... 

How should I log while using multiprocessing in Python?

...that its log goes to a different file descriptor (to disk or to pipe.) Ideally, all log entries should be timestamped. Your controller process can then do one of the following: If using disk files: Coalesce the log files at the end of the run, sorted by timestamp If using pipes (recommended): C...
https://stackoverflow.com/ques... 

About catching ANY exception

How can I write a try / except block that catches all exceptions? 8 Answers 8 ...
https://stackoverflow.com/ques... 

How do I format a string using a dictionary in python-3.x?

...3). In many languages, it is known as splat operator. In JavaScript, it's called spread operator. In python, there is no particular name given to this operator. – abhisekp Apr 15 '17 at 12:01 ...
https://stackoverflow.com/ques... 

How to get the CPU Usage in C#?

I want to get the overall total CPU usage for an application in C#. I've found many ways to dig into the properties of processes, but I only want the CPU usage of the processes, and the total CPU like you get in the TaskManager. ...