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POUsing QtHostinfo.lookupHost in PySide
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  1. POUsing QtHostinfo.lookupHost in PySide
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    copied!<p>I am working on a project where I want to confirm the existence of a host on a local network. In the QtNetwork package in Qt, the <code>QHostInfo::lookupHost</code> method is a convenient way of searching for a host without needing to implement any kind of pinging or being dependent on a ping system call. Its asynchronous call makes it convenient to create a dialog waiting for the call to return with a slot in either the dialog or the main program to handle the return.</p> <h3>From Qt's Documentation for QHostInfo:</h3> <blockquote> <p>To look up a host's IP addresses asynchronously, call lookupHost(), which takes the host name or IP address, a receiver object, and a slot signature as arguments and returns an ID. You can abort the lookup by calling abortHostLookup() with the lookup ID...</p> <p>The slot is invoked when the results are ready. The results are stored in a QHostInfo object. Call addresses() to get the list of IP addresses for the host, and hostName() to get the host name that was looked up.</p> </blockquote> <p><br>The documentation from PySide for <a href="http://www.pyside.org/docs/pyside/PySide/QtNetwork/QHostInfo.html" rel="nofollow"><code>QHostInfo</code></a> details usage of <code>lookupHost</code> but I think it might be automatically generated from the Qt documentation as by default, the method <code>lookupHost</code> is declared as a private method in the <a href="http://qt.gitorious.org/pyside/pyside-archive/blobs/master/PySide/QtNetwork/typesystem_network.xml" rel="nofollow">typesystem definition for QtNetwork</a>.</p> <p>Is there a particular reason that this method is declared private in the PySide implementation? Does it have to do with the asynchronous nature of the call and Python's GIL? </p>
 

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