大约有 40,000 项符合查询结果(耗时:0.0608秒) [XML]

https://stackoverflow.com/ques... 

How do I import the Django DoesNotExist exception?

...y of the model itself, in this case Answer. Your problem is that you are calling the get method - which raises the exception - before it is passed to assertRaises. You need to separate the arguments from the callable, as described in the unittest documentation: self.assertRaises(Answer.DoesNotExis...
https://stackoverflow.com/ques... 

Is bool a native C type?

... in the current C - C99, but not in C89/90. In C99 the native type is actually called _Bool, while bool is a standard library macro defined in stdbool.h (which expectedly resolves to _Bool). Objects of type _Bool hold either 0 or 1, while true and false are also macros from stdbool.h. Note, BTW, t...
https://stackoverflow.com/ques... 

How do I diff the same file between two different commits on the same branch?

... The .. isn't really necessary, though it'll work with it (except in fairly old versions, maybe). You can also use git log or gitk to find SHA1s to use, should the two commits be very far apart. gitk also has a "diff selected -> this" and...
https://stackoverflow.com/ques... 

Multiprocessing - Pipe vs Queue

... as a bonus; JoinableQueue() accounts for tasks when queue.task_done() is called (it doesn't even know about the specific task, it just counts unfinished tasks in the queue), so that queue.join() knows the work is finished. The code for each at bottom of this answer... mpenning@mpenning-T61:~$ pyt...
https://stackoverflow.com/ques... 

Mathematical functions in Swift

... UIKit, Cocoa, Foundation, all valid choices. – erdekhayser Nov 27 '14 at 20:26 ...
https://stackoverflow.com/ques... 

Describe the architecture you use for Java web applications? [closed]

...odularization. We have a number of modules, some starting with 3 to max 30 tables in the database. Most of modules consist of business and web project. Business project holds business and persistence logic while web holds presentation logic. On logical level, there are three layers: Business, Persis...
https://stackoverflow.com/ques... 

Python string.join(list) on object array rather than string array

...riments says that the list comprehension one can be a good 60% faster on small lists (experiment run 10^6 times on a list of three object()s). However, their performance is similar on big lists (2nd experiment run once on a 10^7 objects() list). – gozzilli Mar ...
https://stackoverflow.com/ques... 

MongoDB/Mongoose querying at a specific date?

...onents. To query those times you need to create a date range that includes all moments in a day. db.posts.find( //query today up to tonight {"created_on": {"$gte": new Date(2012, 7, 14), "$lt": new Date(2012, 7, 15)}}) s...
https://stackoverflow.com/ques... 

Call a python function from jinja2

I am using jinja2, and I want to call a python function as a helper, using a similar syntax as if I were calling a macro. jinja2 seems intent on preventing me from making a function call, and insists I repeat myself by copying the function into a template as a macro. ...
https://stackoverflow.com/ques... 

Can I run multiple programs in a Docker container?

.... My application is simply a flask web application and mongo database. Normally I would install both in a VM and, forward a host port to the guest web app. I'd like to give Docker a try but I'm not sure how I'm meant to use more than one program. The documentations says there can only be only ENTRYP...