Eliza::Chatbot::Brain
Version 0.08
$reply = $chatterbot->transform( $string, $use_memory );
transform applies transformation rules to the user input string. It invokes preprocess(), does transformations, then invokes postprocess. It returns the transformed output string, called $reasmb
$reasmb
The algorithm embedded in the transfrom method has three main parts:
Searn the input string for a keyword.
If we find a keyword, use the list of demoposition rules for that keyword. and pattern-match the input string against each rule.
If the input string matches any of the decomposition rules, then randomly select one of the reassembly rules for that decomposition rule, and use it to construct the reply.
transform takes two parameters. The first is the string we want to transform. The second is a flag which indicates where this string came from. If the flag is set, then the string has been pulled from memory, and we should use reassemble rules appropriate for that. If the flag is not set then the string is the most recent user input, and we can use the ordinary reassembly rules.
The memory flag is only set when the transform function is called recursively. The mechanism for setting this parameter is embedded in he transform method itself. If the flag is set inappropriately, it is ignored.
$string = preprocess($string);
preprocess() applies simple substitution rules to the input string. Mostly this is to catch varieties in spelling, misspellings, contractions and the like.
preprocess() is called from within the transform() method. It is applied to user-input text, BEFORE any processing, and before a reassebly statement has been selected.
It uses the array %pre, which is created during the parse of the script.
%pre
$string = postprocess($string);
postprocess() applies simple substitution rules to the reassembly rule. This is where all the "I"'s and "you"'s are exchanged. postprocess() is called from within the transform() function.
It uses the attribute %post, created during the parse of the script.
%post
$self->_test_quit($user_input) ) { }
_test_quit detects words like "bye" and "quit" and returns true if it finds one of them as the first word in the sentence.
Thes words are listed in the script, under the keyword "quit".
$self->_debug_memory
_debug_memory is a special function hwihc returns the contents of Eliza's memory stack.
LNATION email@lnation.org
I started here Chatbot::Eliza and then got a little carried away.
Copyright 2017 Robert Acock.
This program is free software; you can redistribute it and/or modify it under the terms of the the Artistic License (2.0). You may obtain a copy of the full license at:
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To install Eliza::Chatbot, copy and paste the appropriate command in to your terminal.
cpanm
cpanm Eliza::Chatbot
CPAN shell
perl -MCPAN -e shell install Eliza::Chatbot
For more information on module installation, please visit the detailed CPAN module installation guide.