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How to check if an object is a generator object in python?
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edited Sep 6 '11 at 18:20
answered Jun 20 '11 at 19:46
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MySQL Removing Some Foreign keys
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edited Nov 7 '17 at 13:03
Willi Mentzel
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Extending the User model with custom fields in Django
What's the best way to extend the User model (bundled with Django's authentication app) with custom fields? I would also possibly like to use the email as the username (for authentication purposes).
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Get Image size WITHOUT loading image into memory
...cstring for .open says:
def open(fp, mode="r"):
"Open an image file, without loading the raster data"
There are a few file operations in the source like:
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prefix = fp.read(16)
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fp.seek(0)
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but these hardly constitute reading the whole file. In fact .open simply returns a file...
How to use Elasticsearch with MongoDB?
I have gone through many blogs and sites about configuring Elasticsearch for MongoDB to index Collections in MongoDB but none of them were straightforward.
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Very Long If Statement in Python [duplicate]
I have a very long if statement in Python. What is the best way to break it up into several lines? By best I mean most readable/common.
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When to use enumerateObjectsUsingBlock vs. for
...o use and comes more naturally in the context.
While for(... in ...) is quite convenient and syntactically brief, enumerateObjectsUsingBlock: has a number of features that may or may not prove interesting:
enumerateObjectsUsingBlock: will be as fast or faster than fast enumeration (for(... in ......
_DEBUG vs NDEBUG
...n appropriate, ie _DEBUG if you want your debugging code to be consistent with the MS CRT debugging techniques and NDEBUG if you want to be consistent with assert().
If you define your own debugging macros (and you don't hack the compiler or C runtime), avoid starting names with an underscore, as t...
Linux 进程卡住了怎么办？ - 操作系统(内核) - 清泛网 - 专注C/C++及内核技术
...发现 ls 卡住了。
通过下面的命令可以看到 ls 卡在了 vfs_fstatat 调用上，它会给 FUSE 设备发送 getattr 请求，在等待回应。而 JuiceFS 客户端进程已经被我们停掉了，所以它就卡住了：
$ cat /proc/`pgrep ls`/stack
[<ffffffff813277c7>] request_w...
How to exit from Python without traceback?
I would like to know how to I exit from Python without having an traceback dump on the output.
10 Answers
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