<?xml version="1.0" encoding="UTF-8" standalone="no"?> <!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd"> <html xmlns="http://www.w3.org/1999/xhtml"> <head> <meta http-equiv="Content-Type" content="text/html; charset=UTF-8" /> <title>pyeval Opcodes</title> <link rel="stylesheet" type="text/css" href="csound.css" /> <link rel="stylesheet" type="text/css" href="syntax-highlighting.css" /> <meta name="generator" content="DocBook XSL Stylesheets Vsnapshot" /> <link rel="home" href="index.html" title="The Canonical Csound Reference Manual" /> <link rel="up" href="OpcodesTop.html" title="Orchestra Opcodes and Operators" /> <link rel="prev" href="pycall.html" title="pycall Opcodes" /> <link rel="next" href="pyexec.html" title="pyexec Opcodes" /> </head> <body> <div class="navheader"> <table width="100%" summary="Navigation header"> <tr> <th colspan="3" align="center">pyeval Opcodes</th> </tr> <tr> <td width="20%" align="left"><a accesskey="p" href="pycall.html">Prev</a> </td> <th width="60%" align="center">Orchestra Opcodes and Operators</th> <td width="20%" align="right"> <a accesskey="n" href="pyexec.html">Next</a></td> </tr> </table> <hr /> </div> <div class="refentry"> <a id="pyeval"></a> <div class="titlepage"></div> <a id="IndexPyEval" class="indexterm"></a> <div class="refnamediv"> <h2> <span class="refentrytitle">pyeval Opcodes</span> </h2> <p>pyeval — Evaluate a generic Python expression and store the result in a Csound variable at k-time or i-time (i suffix). </p> </div> <div class="refsect1"> <a id="idm281472897305688"></a> <h2>Syntax</h2> <pre class="synopsis">kresult <span class="command"><strong>pyeval</strong></span> "expression"</pre> <pre class="synopsis">iresult <span class="command"><strong>pyevali</strong></span> "expression"</pre> <pre class="synopsis">kresult <span class="command"><strong>pyleval</strong></span> "expression"</pre> <pre class="synopsis">iresult <span class="command"><strong>pylevali</strong></span> "expression"</pre> <pre class="synopsis">kresult <span class="command"><strong>pyevalt</strong></span> ktrigger, "expression"</pre> <pre class="synopsis">kresult <span class="command"><strong>pylevalt</strong></span> ktrigger, "expression"</pre> </div> <div class="refsect1"> <a id="idm281472897254056"></a> <h2>Description</h2> <p>These opcodes evaluate a generic Python expression and store the result in a Csound variable at k-time or i-time (i suffix).</p> <p>The expression must evaluate in a float or an object that can be cast to a float.</p> <p>They can be used effectively to trasfer data from a Python object into a Csound variable.</p> </div> <div class="refsect1"> <a id="idm281472897251848"></a> <h2>Example of the pyeval Opcode Group</h2> <p>The code:</p> <pre class="programlisting"> k1 <span class="opc">pyeval</span> "v1"</pre> <p>will copy the content of the Python variable <span class="emphasis"><em>v1</em></span> into the Csound variable <span class="emphasis"><em>k1</em></span> at each k-time.</p> </div> <div class="refsect1"> <a id="idm281472897247944"></a> <h2>Credits</h2> <p>Copyright (c) 2002 by Maurizio Umberto Puxeddu. All rights reserved. Portions copyright (c) 2004 and 2005 by Michael Gogins. This document has been updated Sunday 25 July 2004 and 1 February 2005 by Michael Gogins.</p> </div> </div> <div class="navfooter"> <hr /> <table width="100%" summary="Navigation footer"> <tr> <td width="40%" align="left"><a accesskey="p" href="pycall.html">Prev</a> </td> <td width="20%" align="center"> <a accesskey="u" href="OpcodesTop.html">Up</a> </td> <td width="40%" align="right"> <a accesskey="n" href="pyexec.html">Next</a></td> </tr> <tr> <td width="40%" align="left" valign="top">pycall Opcodes </td> <td width="20%" align="center"> <a accesskey="h" href="index.html">Home</a> </td> <td width="40%" align="right" valign="top"> pyexec Opcodes</td> </tr> </table> </div> </body> </html>