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round() doesn't seem to be rounding properly
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This is no l longer a problem with either Python 2.7 or Python 3.5
– vy32
Feb 5 '17 at 12:47
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Oracle 11.2.0.4 RAC FOR redhat 6.4 - 数据库(内核) - 清泛网 - 专注C/C++及内核技术
...可以不安装或在安装完 pdksh 以后再安装。
将pdksh 程序包下载到本地。 Pdksh安装包需要在网上下载光盘里没有
# rpm -ivh pdksh-5.2.14-37.el5_8.1.x86_64.rpm
注意：如果提示该程序包与 ksh冲突，如果已经安装 ksh，建议使用命令 rpm -e ksh...
Change the name of a key in dictionary
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In python 2.7 and higher, you can use dictionary comprehension:
This is an example I encountered while reading a CSV using a DictReader. The user had suffixed all the column names with ':'
ori_dict = {'key1:' : 1, 'key2:' : 2, 'key3:'...
How do I merge two dictionaries in a single expression in Python (taking union of dictionaries)?
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Similarly, taking the union of items() in Python 3 (viewitems() in Python 2.7) will also fail when values are unhashable objects (like lists, for example). Even if your values are hashable, since sets are semantically unordered, the behavior is undefined in regards to precedence. So don't do this:
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Options for HTML scraping? [closed]
...brary has a built-in HTML Parser... why not just use that? docs.python.org/2.7/library/htmlparser.html
– ArtOfWarfare
Jul 20 '15 at 20:29
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Creating a new dictionary in Python
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@ Matt Apparently CPython 2.7 dict() is slower (6 times slower?), See: doughellmann.com/2012/11/… In any case I am starting to prefer the constructor syntax anyways since I find it easier to type and move code between dicts and function calls.
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How to find if directory exists in Python
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In [8]: q.is_dir()
Out[8]: False
Pathlib is also available on Python 2.7 via the pathlib2 module on PyPi.
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How would you make a comma-separated string from a list of strings?
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Note if you are using python 2.7 (which you shouldn't by now) then using str will raise an exception if any item in the list has unicode.
– kroiz
May 26 at 13:54
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cv2.imshow command doesn't work properly in opencv-python
I'm using opencv 2.4.2, python 2.7
The following simple code created a window of the correct name, but its content is just blank and doesn't show the image:
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快速理解 高频对冲套利自动交易（程式化交易） - 更多技术 - 清泛网 - 专注...
...是将我现在正在做的事情，与需要的人做一些分享。
我在东航的账户，这段时间，可以在后台看到，在8点59分到9点之间，1、2秒钟内，连续10多个报单同时报出，这大大地提高我报单的效率（包括准确度及速度）。
原来，在...