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Argparse: Required arguments listed under “optional arguments”?

I use the following simple code to parse some arguments; note that one of them is required. Unfortunately, when the user runs the script without providing the argument, the displayed usage/help text does not indicate that there is a non-optional argument, which I find very confusing. How can I get p...
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nginx missing sites-available directory

I installed Nginx on Centos 6 and I am trying to set up virtual hosts. The problem I am having is that I can't seem to find the /etc/nginx/sites-available directory. ...
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Is jquery a javascript library or framework? [closed]

... A library. According to the homepage, and which I agree with. A framework is something that usually forces a certain way of implementing a solution, whereas jQuery is just a tool to make implementing what you want to do easier. ...
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php static function

I have a question regarding static function in php. 6 Answers 6 ...
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Find what filetype is loaded in vim

As soon as I load any file in vim, It'll try to detect the file and color-highlight it if possible. 5 Answers ...
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angular.min.js.map not found, what is it exactly?

When I load the page and check chrome console i find these errors: 2 Answers 2 ...
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The requested resource does not support HTTP method 'GET'

...tp.AcceptVerbs("GET", "POST")] [System.Web.Http.HttpGet] public string Auth(string username, string password) {...} The reason why it doesn't work is because you were using the attributes that are from the MVC namespace System.Web.Mvc. The classes in the System.Web.Http namespace are...
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OSError: [Errno 2] No such file or directory while using python subprocess in Django

I am trying to run a program to make some system calls inside Python code using subprocess.call() which throws the following error: ...
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Fragment onResume() & onPause() is not called on backstack

I have multiple fragment inside an activity. On a button click I am starting a new fragment, adding it to backstack. I naturally expected the onPause() method of current Fragment and onResume() of new Fragment to be called. Well it is not happening. ...
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What is Ruby equivalent of Python's `s= “hello, %s. Where is %s?” % (“John”,“Mary”)`

In Python, this idiom for string formatting is quite common 4 Answers 4 ...