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How to find all the subclasses of a class given its name?
...on of a subclass hasn't been executed yet - for example, if the subclass's module hasn't been imported yet - then that subclass doesn't exist yet, and __subclasses__ won't find it.
You mentioned "given its name". Since Python classes are first-class objects, you don't need to use a string with th...
How to manage local vs production settings in Django?
...
I prefer calling the module settings_local as opposed to local_settings to group it with settings.py in alphabetical folder listings. Keep settings_local.py out of version control using .gitignore as credentials don't belong to Git. Imagine open ...
How to track untracked content?
...ns/open_flash_chart_2 as “gitlink” entry, but never defined it as a submodule. Effectively you are using the internal feature that git submodule uses (gitlink entries) but you are not using the submodule feature itself.
You probably did something like this:
git clone git://github.com/korin/op...
Is there a way of having git show lines added, lines changed and lines removed?
... diff --numstat
to get numerical diff information.
As far as separating modification from an add and remove pair, --word-diff might help. You could try something like this:
MOD_PATTERN='^.+(\[-|\{\+).*$' \
ADD_PATTERN='^\{\+.*\+\}$' \
REM_PATTERN='^\[-.*-\]$' \
git diff --word-diff --unified=0 |...
如何高效的学习掌握新技术 - 杂谈 - 清泛网 - 专注C/C++及内核技术
...角度来看待问题。
从心理学的角度来说，我们对于外部世界的认识可分为三个区域：舒适区，学习区，和恐慌区。我们所熟悉的技术领域就是舒适区，而新技术是处于学习区或恐慌区。随着对新技术的掌握，新技术会进入舒适...
创业者：在寻找 不迷茫 - 资讯 - 清泛网 - 专注C/C++及内核技术
...行业退出，不是不想上班，更不是因为我傻，我只是想把我的想法实现。”今年才25岁的张宏强去美国读的是金融系研究生，毕业时，一进排满投行和会计师事务所的招聘大厅，他明显感到不适。
“难道我这辈子就要跟他们一...
How to reverse a string in Go?
...string(runes[n:])
}
func main() {
fmt.Println(Reverse(Reverse("Hello, 世界")))
fmt.Println(Reverse(Reverse("The quick brown 狐 jumped over the lazy 犬")))
}
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Iterating through directories with Python
...Another way of returning all files in subdirectories is to use the pathlib module, introduced in Python 3.4, which provides an object oriented approach to handling filesystem paths (Pathlib is also available on Python 2.7 via the pathlib2 module on PyPi):
from pathlib import Path
rootdir = Path('C...
OceanBase使用libeasy原理源码分析：客户端 - 数据库(内核) - 清泛网 - 专...
...这个session包装的request的opacket上，设置session的目标server地址，最后通过easy_session_set_timeout设置这个session的超时时间timeout，这也就是这个请求的超时时间。
然后调用int easy_client_dispatch(easy_io_t *eio, easy_addr_t addr, easy_session_t *s)将...
Redis消息通知系统的实现 - 大数据 & AI - 清泛网 - 专注C/C++及内核技术
...返跑，把命令打包给服务端统一处理。
前后两段代码在我的测试里，使用PIPELINE的速度大概是不使用PIPELINE的十倍。
查询
我们用Redis命令行来演示一下用户是如何查询消息的。
先插入三条消息，其<MSGID>分别是1，2，3：
redis...