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<title>8.12 pipes -- Interface to shell pipelines
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<H1><A NAME=
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8.12 <tt class=
"module">pipes
</tt> --
Interface to shell pipelines
</A>
<A NAME=
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<p class=
"availability">Availability:
<span
class=
"platform">Unix
</span>.
</p>
The
<tt class=
"module">pipes
</tt> module defines a class to abstract the concept of
a
<em>pipeline
</em> -- a sequence of convertors from one file to
Because the module uses
<b class=
"program">/bin/sh
</b> command lines, a POSIX or
compatible shell for
<tt class=
"function">os.system()
</tt> and
<tt class=
"function">os.popen()
</tt>
The
<tt class=
"module">pipes
</tt> module defines the following class:
<dl><dt><table cellpadding=
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"0"><tr valign=
"baseline">
<td><nobr><b><span class=
"typelabel">class
</span> <tt id='l2h-
3031' xml:id='l2h-
3031'
class=
"class">Template
</tt></b>(
</nobr></td>
<td><var></var>)
</td></tr></table></dt>
An abstraction of a pipeline.
<div class=
"verbatim"><pre>
>>> import pipes
>>> t=pipes.Template()
>>> t.append('tr a-z A-Z', '--')
>>> f=t.open('/tmp/
1', 'w')
>>> f.write('hello world')
>>> open('/tmp/
1').read()
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<span class=
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2.4.2, documentation updated on
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2005.
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