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<span class="refentrytitle">pyexec Opcodes</span>
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<p>pyexec — Execute a script from a file at k-time or i-time (i suffix).
</p>
</div>
<div class="refsect1" title="Syntax">
<a id="idp39632072"></a>
<h2>Syntax</h2>
<pre class="synopsis"><span class="command"><strong>pyexec</strong></span> "filename"</pre>
<pre class="synopsis"><span class="command"><strong>pyexeci</strong></span> "filename"</pre>
<pre class="synopsis"><span class="command"><strong>pylexec</strong></span> "filename"</pre>
<pre class="synopsis"><span class="command"><strong>pylexeci</strong></span> "filename"</pre>
<pre class="synopsis"><span class="command"><strong>pyexect</strong></span> ktrigger, "filename"</pre>
<pre class="synopsis"><span class="command"><strong>plyexect</strong></span> ktrigger, "filename"</pre>
</div>
<div class="refsect1" title="Description">
<a id="idp39679712"></a>
<h2>Description</h2>
<p>Execute a script from a file at k-time or i-time (i
suffix).</p>
<p>This is not the same as calling the script with the <code class="literal">system()</code>
call, since the code is executed by the embedded interpreter.</p>
<p>The code contained in the specified file is executed in the
global environment for opcodes pyexec and pyexeci and in the private
environment for the opcodes pylexec and pylexeci.</p>
<p>These opcodes perform no message passing. However, since the
statement has access to the main namespace and the private namespace,
it can interact with objects previously created in that
environment.</p>
<p>The "local" version of the <span class="emphasis"><em>pyexec</em></span> opcodes are useful when the
code ran by different instances of an instrument should not
interact.</p>
</div>
<div class="refsect1" title="Example of the pyexec Opcode Group">
<a id="idp39682416"></a>
<h2>Example of the pyexec Opcode Group</h2>
<div class="example">
<a id="idp39682776"></a>
<p class="title">
<strong>Example 685. Orchestra (pyexec.orc)</strong>
</p>
<div class="example-contents">
<pre class="programlisting">
<span class="ohdr">sr</span>=44100
<span class="ohdr">kr</span>=4410
<span class="ohdr">ksmps</span>=10
<span class="ohdr">nchnls</span>=1
<span class="comment">;If you're not running CsoundAC you need the following line</span>
<span class="comment">;to initialize the python interpreter</span>
<span class="comment">;pyinit</span>
<span class="opc">pyruni</span> "import random"
<span class="opc">pyexeci</span> "pyexec1.py"
<span class="oblock">instr</span> 1
<span class="opc">pyexec</span> "pyexec2.py"
<span class="opc">pylexeci</span> "pyexec3.py"
<span class="opc">pylexec</span> "pyexec4.py"
<span class="oblock">endin</span></pre>
</div>
</div>
<br class="example-break" />
<div class="example">
<a id="idp39688504"></a>
<p class="title">
<strong>Example 686. Score (pyexec.sco)</strong>
</p>
<div class="example-contents">
<pre class="programlisting">
<span class="stamnt">i</span>1 0 0.01
<span class="stamnt">i</span>1 0 0.01</pre>
</div>
</div>
<br class="example-break" />
<div class="example">
<a id="idp39689936"></a>
<p class="title">
<strong>Example 687. The pyexec1.py Script</strong>
</p>
<div class="example-contents">
<pre class="programlisting">
import time, os
print
print "Welcome to Csound!"
try:
s = ', %s?' % os.getenv('USER')
except:
s = '?'
print 'What sound do you want to hear today%s' % s
answer = raw_input()</pre>
</div>
</div>
<br class="example-break" />
<div class="example">
<a id="idp39690880"></a>
<p class="title">
<strong>Example 688. The pyexec2.py script</strong>
</p>
<div class="example-contents">
<pre class="programlisting">
print 'your answer is "%s"' % answer</pre>
</div>
</div>
<br class="example-break" />
<div class="example">
<a id="idp39691680"></a>
<p class="title">
<strong>Example 689. The pyexec3.py script</strong>
</p>
<div class="example-contents">
<pre class="programlisting">
message = 'a private random number: %f' % random.random()</pre>
</div>
</div>
<br class="example-break" />
<div class="example">
<a id="idp39692496"></a>
<p class="title">
<strong>Example 690. The pyexec4.py script</strong>
</p>
<div class="example-contents">
<pre class="programlisting">
print message</pre>
</div>
</div>
<br class="example-break" />
<p>If I run this example on my machine I get something like:</p>
<pre class="screen">
Using ../../csound.xmg
Csound Version 4.19 (Mar 23 2002)
Embedded Python interpreter version 2.2
orchname: pyexec.orc
scorename: pyexec.sco
sorting score ...
... done
orch compiler:
11 lines read
instr 1
Csound Version 4.19 (Mar 23 2002)
displays suppressed
Welcome to Csound!
What sound do you want to hear today, maurizio?</pre>
<p>then I answer</p>
<pre class="screen">
a sound</pre>
<p>then Csound continues with the normal performance</p>
<pre class="screen">
your answer is "a sound"
a private random number: 0.884006
new alloc for instr 1:
your answer is "a sound"
a private random number: 0.884006
your answer is "a sound"
a private random number: 0.889868
your answer is "a sound"
a private random number: 0.884006
your answer is "a sound"
a private random number: 0.889868
your answer is "a sound"
a private random number: 0.884006
your answer is "a sound"
...</pre>
<p>In the same instrument a message is created in the private
namespace and printed, appearing different for each instance.</p>
</div>
<div class="refsect1" title="Credits">
<a id="idp39696528"></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>
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