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How can I dynamically create derived classes from a base class

... you need other verifications, like type, or that they are mandatory, just add the logic there: class BaseClass(object): def __init__(self, classtype): self._type = classtype def ClassFactory(name, argnames, BaseClass=BaseClass): def __init__(self, **kwargs): for key, value...
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What do pty and tty mean?

...ke a "teletype", ie, a terminal. (Called teletype because that's what we had for terminals in those benighted days.) A pty is a pseudotty, a device entry that acts like a terminal to the process reading and writing there, but is managed by something else. They first appeared (as I recall) for X Wi...
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What is the boundary in multipart/form-data?

I want to ask a question about the multipart/form-data . In the HTTP header, I find that the Content-Type: multipart/form-data; boundary=??? . ...
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Providing white space in a Swing GUI

... provide spacing between various components. 1.) BorderLayout : Overloaded Constructor : BorderLayout(int horizontalGap, int verticalGap) Getter and setter methods For Horizontal Spacing : BorderLayout.getHgap() and BorderLayout.setHgap(int hgap) For Vertical Spacing : BorderLayout.getVgap() ...
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How are software license keys generated?

...lt for crackers to build their own key generators? How are key generators made? 10 Answers ...
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Are lists thread-safe?

I notice that it is often suggested to use queues with multiple threads, instead of lists and .pop() . Is this because lists are not thread-safe, or for some other reason? ...
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URL matrix parameters vs. query parameters

...p;objects_name=green&page=1 This way you would also lose the clarity added by the locality of the parameters within the request. In addition, when using a framework like JAX-RS, all the query parameters would show up within each resource handler, leading to potential conflicts and confusion. ...
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Best way to get child nodes

... Tim DownTim Down 281k6464 gold badges415415 silver badges497497 bronze badges ...
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Why are Objective-C delegates usually given the property assign instead of retain?

...ates B A sets itself as B's delegate … A is released by its owner If B had retained A, A wouldn't be released, as B owns A, thus A's dealloc would never get called, causing both A and B to leak. You shouldn't worry about A going away because it owns B and thus gets rid of it in dealloc. ...
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Clojure differences between Ref, Var, Agent, Atom, with examples

...with real world scenarios. I mean, where to use Ref, Var, Agent, Atom. I read book, but, still couldn't understand the real world examples. ...