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Running a specific test case in Django when your app has a tests directory
... run a complete test case, or single test, using the complete dot notation for the element you want to run.
Automatic test discovery will now find tests in any file that starts with test under the working directory, so addressing the question you would have to rename your files, but you can now kee...
Understanding Python super() with __init__() methods [duplicate]
...ildB(Base):
def __init__(self):
mro = type(self).mro()
for next_class in mro[mro.index(ChildB) + 1:]: # slice to end
if hasattr(next_class, '__init__'):
next_class.__init__(self)
break
If we didn't have the super object, we'd have to ...
Elasticsearch query to return all records
I have a small database in Elasticsearch and for testing purposes would like to pull all records back. I am attempting to use a URL of the form...
...
Syntax Error: Not a Chance
...
For folks puzzled by "not a chance", which is slang, it means that there is no possibility or probability of the thing happening.
– DOK
Jul 23 '13 at 13:43
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理解Python的 with 语句 - 大数据 & AI - 清泛网 - 专注C/C++及内核技术
...e to do a setup and teardown to make something happen. A very good example for this is the situation where you want to gain a handler to a file, read data from the file and the close the file handler.
有一些任务，可能事先需要设置，事后做清理工作。对于这种场景，Python...
How to read a single character from the user?
Is there a way of reading one single character from the user input? For instance, they press one key at the terminal and it is returned (sort of like getch() ). I know there's a function in Windows for it, but I'd like something that is cross-platform.
...
Why would you use an ivar?
...the clever people can access and mutate quite easily via the accessors.
Performance
Yes, this can make a difference in some cases. Some programs have constraints where they can not use any objc messaging in certain parts of the program (think realtime). In other cases, you may want to access it dire...
When saving, how can you check if a field has changed?
...gs, **kwargs)
self.__original_name = self.name
def save(self, force_insert=False, force_update=False, *args, **kwargs):
if self.name != self.__original_name:
# name changed - do something here
super(Person, self).save(force_insert, force_update, *args, **kwa...
OceanBase使用libeasy原理源码分析：服务器端 - 数据库(内核) - 清泛网 - ...
...sy_list_t *request_list_node，用于将easy_request_t串起来
easy_list_for_each_entry_safe(r, rn, request_list, request_list_node)
{
//r指向链表中第一个easy_request_t元素
//rn指向链表中第二个easy_request_t元素
}
这里用到easy_list_for_each_entry_safe和easy_list_e...
Is inject the same thing as reduce in ruby?
...ey the same thing? Why does Ruby have so many aliases (such as map/collect for arrays)? Thanks a lot.
2 Answers
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