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How to set Python's default version to 3.x on OS X?

...n use command python, which will leaving the alias untouched, and works in all shells. If you launch interpreters more often (I do), you can always create more aliases to add as well, i.e.: alias 2='python2' alias 3='python3' Tip: For scripts, instead of using a shebang like: #!/usr/bin/env p...
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How to write header row with csv.DictWriter?

...ion "functionality", I'd prefer to code it myself; that way you can report ALL "extras" with the keys and values, not just the first extra key. What is a real nuisance with DictWriter is that if you've verified the keys yourself as each dict was being built, you need to remember to use extrasaction=...
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How does Bluebird's util.toFastProperties function make an object's properties “fast”?

... eval("o" + o); // ensure no dead code elimination } Sans one or two small optimizations - all the below is still valid. Let's first discuss what it does and why that's faster and then why it works. What it does The V8 engine uses two object representations: Dictionary mode - in which object ar...
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Center image in table td in CSS

... height:100%; text-align:center; vertical-align:middle; z-index: 9999; } </style> <table class="super-centered"><tr><td style="width:100%;height:100%;" align="center" valign="middle" > <img alt="Loading ..." src="/ALHTheme/themes/html/ALHTheme/images...
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unbound method f() must be called with fibo_ instance as first argument (got classobj instance inste

... OK, first of all, you don't have to get a reference to the module into a different name; you already have a reference (from the import) and you can just use it. If you want a different name just use import swineflu as f. Second, you are...
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Android NDK C++ JNI (no implementation found for native…)

...g the function prototype name wrong, another is failing to load the .so at all. Are you sure that System.loadLibrary() is being called before the method is used? If you don't have a JNI_OnLoad function defined, you may want to create one and have it spit out a log message just to verify that the l...
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Getting the error “Missing $ inserted” in LaTeX

...ommand, which will typeset the text in a monospaced font and will automatically handle underscores and bars correctly (no need to escape them with \). share | improve this answer | ...
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Dynamically updating plot in matplotlib

...out the more modern animation examples in the matplotlib documentation. Finally, the animation API defines a function FuncAnimation which animates a function in time. This function could just be the function you use to acquire your data. Each method basically sets the data property of the object be...
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A transport-level error has occurred when receiving results from the server [closed]

... Can you provide some details on what that actually does? Are there any reasons against setting such a value globally? – Drew Noakes Dec 5 '10 at 19:02 ...
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Getting the docstring from a function

... On ipython or jupyter notebook, you can use all the above mentioned ways, but i go with my_func? or ?my_func for quick summary of both method signature and docstring. I avoid using my_func?? (as commented by @rohan) for docstring and use it only to check th...