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Python list iterator behavior and next(iterator)
...next(a)
>>>
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Works like expected.
Tested in Python 2.7 and in Python 3+ . Works properly in both
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What is the Scala annotation to ensure a tail recursive function is optimized?
...then get a warning if they are not optimised by the compiler.
In Scala 2.7 or earlier, you will need to rely on manual testing, or inspection of the bytecode, to work out whether a method has been optimised.
Example:
you could add a @tailrec annotation so that you can be sure that your ...
Argparse optional positional arguments?
...', as it seems to me, they are identical in their effect (tested in Python 2.7.10 and Python 3.6.1)?
– user8554766
Aug 8 '18 at 11:49
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setup.py examples?
...g Language :: Python :: 2.6',
'Programming Language :: Python :: 2.7',
'Programming Language :: Python :: 3',
'Programming Language :: Python :: 3.2',
'Programming Language :: Python :: 3.3',
'Programming Language :: Python :: 3.4',
],
ke...
Are tuples more efficient than lists in Python?
...at tuple access is slower than list access. However, trying that in Python 2.7 on my Windows 7 PC, the difference is only 10%, so unimportant.
– ToolmakerSteve
Dec 15 '13 at 19:57
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super() fails with error: TypeError “argument 1 must be type, not classobj” when parent does not inh
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I was also faced by the posted issue when I used python 2.7. It is working very fine with python 3.4
To make it work in python 2.7 I have added the __metaclass__ = type attribute at the top of my program and it worked.
__metaclass__ : It eases the transition from old-style class...
How to convert a dictionary to query string in Python?
...ries of key=value pairs separated by '&' characters...
— Python 2.7 urllib docs
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Reintegrate can only be used if revisions X through Y were previously merged from to reintegra
...o find the files with mergeinfo information you can do:
cd ~/svn/branches/2.7
svn propget -R svn:mergeinfo .
Then you can remove the mergeinfo properties:
svn propdel svn:mergeinfo proj/src/main/java/com/foo/furniture.java ...
svn commit -m 'removed mergeinfo' proj/src/main/java/com/foo/furnitur...
数据挖掘——分词入门 - 大数据 & AI - 清泛网 - 专注C/C++及内核技术
...早由哈工大王晓龙博士理论化的取最小切分词数，比如“我在中华人民共和国家的院子里看书”，正向最大匹配切分出来为“我/在/中华人民共和国/家/的/院子/里/看书”工8个词语，逆向最大匹配切分出来为“我/在/中华/人民/共...
社会化海量数据采集爬虫框架搭建 - 大数据 & AI - 清泛网 - 专注C/C++及内核技术
...些内容聚类，可以统计学、可视化抓取把内容扣取出几个版本给用户去纠正，最后确认的规则就是新网站的规则。这些算法后续再讲。这块再补充一下（多谢zicjin建议）：
背景：如果我们需要抓取的网站很多，那如果靠可视化...