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POtrigger tab completion for python batch process built around readline
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  1. POtrigger tab completion for python batch process built around readline
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    copied!<p><strong>Background:</strong> I have a python program that imports and uses the readline module to build a homemade command line interface. I have a second python program (built around bottle, a web micro-framework) that acts as a front-end for that CLI. The second python program opens a pipe-like interface to the first, essentially passing user input and CLI output back and forth between the two.</p> <p><strong>Problem:</strong> In the outer wrapper program (the web interface), whenever the end-user presses the TAB key (or any other key that I bind the readline completer function), that key is inserted into the CLI's stdin <strong>without</strong> firing the readline completer function. I need this to trigger readline's command completion function instead, as normally occurs during an interactive CLI session.</p> <p><strong>Possible Solution #1:</strong> Is there some way to send the TAB key to a subprocess' stdin, so that a batch usage works the same as an interactive usage?</p> <p><strong>Possible Solution #2:</strong> Or, if there was some way to trigger the entire completion process manually (including matches <strong>generation</strong> and <strong>display</strong>), I could insert and scan for a special text sequence, like <code>"&lt;TAB_KEY_HERE&gt;"</code>, firing the possible completion matches <strong>display</strong> function manually. (I wrote the completer function, which generates the possible matches, so all I really need is access to readline's function to display the possible matches.)</p> <p><strong>Possible Solution #3:</strong> I guess, if I cannot access readline's matches-display function, the last option is to rewrite readline's built-in display-completion function, so I can call it directly. :(</p> <p>Is there a better solution? Any suggestions on following the paths presented by any of the above solutions? I am stuck on #1 and #2, and I'm trying to avoid #3.</p> <p>Thanks!</p>
 

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