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How can I dynamically create derived classes from a base class
...st like pickle does to ordinary objects, and had lived to it in some of my tests.
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Stripping everything but alphanumeric chars from a string in Python
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I just timed some functions out of curiosity. In these tests I'm removing non-alphanumeric characters from the string string.printable (part of the built-in string module). The use of compiled '[\W_]+' and pattern.sub('', str) was found to be fastest.
$ python -m timeit -s \
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Run certain code every n seconds [duplicate]
...code from the web user manual. The above code is now corrected (still not tested, but it comes from my own working code and I am using it constantly). PS: maybe we are looking at different versions / modules? I'm sure my line is "from apscheduler.scheduler import Scheduler" with capital S and not...
Is there a better way to express nested namespaces in C++ within the header
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... enabled by compiler switch /std:c++latest
– sunny moon
Aug 10 '16 at 6:34
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How to find elements by class
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Update: 2016
In the latest version of beautifulsoup, the method 'findAll' has been renamed to
'find_all'. Link to official documentation
Hence the answer will be
soup.find_all("html_element", class_="your_class_name")
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Java regex email
...t of all, I know that using regex for email is not recommended but I gotta test this out.
20 Answers
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What's the best way to parse command line arguments? [closed]
...rg part is an empty string.
You then usually want to loop on this list and test the option name as in the example.
I hope this helped you.
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搭建高可用mongodb集群（四）—— 分片 - 大数据 & AI - 清泛网 - 专注C/C++及内核技术
...测试文件夹。
#存放mongodb数据文件
mkdir -p /data/mongodbtest
#进入mongodb文件夹
cd /data/mongodbtest
3、下载mongodb的安装程序包
wget http://fastdl.mongodb.org/linux/mongodb-linux-x86_64-2.4.8.tgz
#解压下载的压缩包
tar xvzf mongodb-linux-x86_64-2.4...
No output to console from a WPF application?
I'm using Console.WriteLine() from a very simple WPF test application, but when I execute the application from the command line, I'm seeing nothing being written to the console. Does anyone know what might be going on here?
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How to show all shared libraries used by executables in Linux?
...nu/libuuid.so.1.3.0
This method also shows libraries opened with dlopen, tested with this minimal setup hacked up with a sleep(1000) on Ubuntu 18.04.
See also: https://superuser.com/questions/310199/see-currently-loaded-shared-objects-in-linux/1243089
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