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Argparse: Required argument 'y' if 'x' is present

...ually inclusive sets of options. The simplest way to deal with this would be: if args.prox and (args.lport is None or args.rport is None): parser.error("--prox requires --lport and --rport.") share | ...
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What does “hashable” mean in Python?

I tried searching internet but could not find the meaning of hashable. 9 Answers 9 ...
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Select distinct using linq [duplicate]

... myList.GroupBy(test => test.id) .Select(grp => grp.First()); Edit: as getting this IEnumerable<> into a List<> seems to be a mystery to many people, you can simply write: var result = myList.GroupBy(test =...
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Get URL of ASP.Net Page in code-behind [duplicate]

I have an ASP.Net page that will be hosted on a couple different servers, and I want to get the URL of the page (or even better: the site where the page is hosted) as a string for use in the code-behind. Any ideas? ...
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Drawable image on a canvas

How can I get an image to the canvas in order to draw on that image? 6 Answers 6 ...
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Get host domain from URL?

how to get host domain from a string URL? 9 Answers 9 ...
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Legality of COW std::string implementation in C++11

It had been my understanding that copy-on-write is not a viable way to implement a conforming std::string in C++11, but when it came up in discussion recently I found myself unable to directly support that statement. ...
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Change timestamps while rebasing git branch

I have reorganized the commits in a branch before it is going to be made public causing the timestamps of the commits to be in an mixed up order. I would rather have them be all be today with only seconds in between. ...
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Why start a shell command with a backslash?

Why is the command starting with \ ? This is the site where I saw it. 2 Answers 2 ...
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How to do a GitHub pull request

...o I create and/or send a pull request to another repository hosted on GitHub? 8 Answers ...