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What is the difference between class and instance attributes?

...nce you get that, nothing complicated is happening here. Hopefully it's now obvious why Alex used a list: the fact that you can mutate a list means it's easier to show that two variables name the same list, and also means it's more important in real-life code to know whether you have two lists or...
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How to perform OR condition in django queryset?

...ryset = combined_queryset.order_by('-income') Update 2019-06-20: This is now fully documented in the Django 2.1 QuerySet API reference. More historic discussion can be found in DjangoProject ticket #21333. share |...
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Nested classes' scope?

.... The documentation for Py3 is also slightly different reflecting this. It now says "The scope of names defined in a class block is limited to the class block; it does not extend to the code blocks of methods – this includes comprehensions and generator expressions since they are implemented using...
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How can I open a link in a new window?

...few' w3c trolls)... will continue to be AN authoritative source...even w3c now are backing it again ;-) – Dawesi Aug 26 '15 at 7:51 ...
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Simple Log to File example for django 1.3+

...['console', 'logfile'], 'level': 'DEBUG', }, } } Now what does all of this mean? Formaters I like it to come out as the same style as ./manage.py runserver Handlers - I want two logs - a debug text file, and an info console. This allows me to really dig in (if needed) an...
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What's the cause of this FatalExecutionEngineError in .NET 4.5 beta? [closed]

...compiler changed so that it did not emit a static constructor for string, knowing that String.Empty would be assigned from the unmanaged side. This change appears to have been made for .NET 4.5. It appears that the EE does not assign String.Empty soon enough along some optimization paths. The ch...
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How to extract the decision rules from scikit-learn decision-tree?

... @Daniele, do you know how the classes are ordered? I would guess alphanumeric, but I haven't found confirmation anywhere. – IanS Sep 4 '15 at 8:27 ...
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What is __gxx_personality_v0 for?

... tell the compiler that the code was C++ (for example- missing extension). Now it seems that compiling C++ code with gcc misses inclusion of come libraries. Apart from missing some libraries, are there some other "side-effects" of compiling my file.cpp with gcc instead of g++? –...
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/bin/sh: pushd: not found

...y my PS1 is (\u) \h:\w> but I just stripped it down to a generic string now for the answer. The prompt in DOS is also ending with > by default ($P$G IIRC), and I like that. – hlovdal Mar 4 '11 at 12:28 ...
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What's a good way to extend Error in JavaScript?

...) instanceof CustomError);// false was true at the time of writing but has now been resolved. In fact the issue linked in the answer has been resolved and we can test the correct behaviour here and by pasting the code in the REPL and seeing how it gets correctly transpiled to instantiate with the co...