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Concatenating two lists - difference between '+=' and extend()

I've seen there are actually two (maybe more) ways to concatenate lists in Python: One way is to use the extend() method: 9...
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How do you programmatically set an attribute?

... Damn shame it doesn't work in all cases, as that would be really useful, for example, for adding the dirty attribute to user input... – brice Feb 28 '12 at 18:32 ...
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Sibling package imports

...ks well for private scripts, but there has been several improvements Installing the package (in a virtualenv or not) will give you what you want, though I would suggest using pip to do it rather than using setuptools directly (and using setup.cfg to store the metadata) Using the -m flag and runnin...
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How to achieve function overloading in C?

...sociation list that looks a bit like a switch block. _Generic gets the overall type of the expression and then "switches" on it to select the end result expression in the list for its type: _Generic(1, float: 2.0, char *: "2", int: 2, default: get_two_object()); ...
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How do I get a PHP class constructor to call its parent's parent's constructor?

I need to have a class constructor in PHP call its parent's parent's (grandparent?) constructor without calling the parent constructor. ...
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How do I achieve the theoretical maximum of 4 FLOPs per cycle?

... while (i < 1000){ // Here's the meat - the part that really matters. r0 = _mm_mul_pd(r0,rC); r1 = _mm_add_pd(r1,rD); r2 = _mm_mul_pd(r2,rE); r3 = _mm_sub_pd(r3,rF); r4 = _mm_mul_pd(r4,rC); r5 = _mm_add_pd(r5...
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Installing Python packages from local file system folder to virtualenv with pip

Is it possible to install packages using pip from the local filesystem? 10 Answers 10 ...
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What is a “callable”?

...t's clear what a metaclass is , there is an associated concept that I use all the time without knowing what it really means. ...
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Can comments be used in JSON?

... No. The JSON should all be data, and if you include a comment, then it will be data too. You could have a designated data element called "_comment" (or something) that would be ignored by apps that use the JSON data. You would probably be bett...
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How to downgrade or install an older version of Cocoapods

How can I downgrade Cocoapods to an older version, or how can I install an older version of Cocoapods? 6 Answers ...