大约有 43,000 项符合查询结果（耗时：0.0244秒） [XML]
实战低成本服务器搭建千万级数据采集系统 - 更多技术 - 清泛网 - 专注C/C++...
...器。到了机器后再按照天或者半天分表，比如表名为 weibo_2013020101 、weibo_2013020112。weibo_2013020101表示2月1日上午一个表，weibo_2013020112表示2月1日下午一个表。光这样分了还是不够，1000w/2=500w，经不起压力扩展。我们还需要把表再...
error LNK2038: mismatch detected for '_ITERATOR_DEBUG_LEVEL': value '0' doesn't match value '2' in m
...al studio or they explicitly added the defines to the project.
Search for _ITERATOR_DEBUG_LEVEL and _SECURE_SCL remove them or set them appropriately in all projects and sources and rebuild everything.
_ITERATOR_DEBUG_LEVEL = 0 // disabled (for release builds)
_ITERATOR_DEBUG_LEVEL = 1 // enabled ...
Convert Django Model object to dict with all of the fields intact
...f corner case handling and closeness to the desired result.
1. instance.__dict__
instance.__dict__
which returns
{'_foreign_key_cache': <OtherModel: OtherModel object>,
'_state': <django.db.models.base.ModelState at 0x7ff0993f6908>,
'auto_now_add': datetime.datetime(2018, 12, 20...
Iterate over model instance field names and values in template
...f the values of that instance in table format, with the field name (verbose_name specifically if specified on the field) in the first column and the value of that field in the second column.
...
Mocking a class: Mock() or patch()?
...ake a look at this snippet:
>>> class MyClass(object):
... def __init__(self):
... print 'Created MyClass@{0}'.format(id(self))
...
>>> def create_instance():
... return MyClass()
...
>>> x = create_instance()
Created MyClass@4299548304
>>>
>>>...
How can I create a unique constraint on my column (SQL Server 2008 R2)?
...
Or set column as unique from the SQL Query window:
alter table location_key drop constraint pinky;
alter table your_table add constraint pinky unique(yourcolumn);
Changes take effect immediately:
Command(s) completed successfully.
...
What's the canonical way to check for type in Python?
...
str.__subclasses__() only returns the direct subclasses of str, and does not do the same thing as issubclass() or isinstance(). (To do that, you would have to recursively call .__subclasses__().
– Thomas Wou...
Convert SVG to image (JPEG, PNG, etc.) in the browser
...
svgopen.org/2010/papers/62-From_SVG_to_Canvas_and_Back - Works perfectly! [On the link page, sourceSVG = $("#your_svg_elem_name").get(0) ]
– Vijay Singh
Apr 24 '16 at 17:40
...
How to create a zip archive of a directory in Python?
... for file in files:
ziph.write(os.path.join(root, file))
if __name__ == '__main__':
zipf = zipfile.ZipFile('Python.zip', 'w', zipfile.ZIP_DEFLATED)
zipdir('tmp/', zipf)
zipf.close()
Adapted from: http://www.devshed.com/c/a/Python/Python-UnZipped/
...
Convert all first letter to upper case, rest lower for each word
....Thread.CurrentThread.CurrentCulture.TextInfo.ToTitleCase(s.ToLower());
IL_0000: ldstr "THIS IS MY TEXT RIGHT NOW"
IL_0005: stloc.0 // s
IL_0006: call System.Threading.Thread.get_CurrentThread
IL_000B: callvirt System.Threading.Thread.get_CurrentCulture
IL_0010: callvirt ...