17.1.3 Replacing Older Functions with the subprocess Module
In this section, "a ==> b" means that b can be used as a replacement for a.
Note: All functions in this section fail (more or less) silently if the executed program cannot be found; this module raises an OSError exception.
In the following examples, we assume that the subprocess module is imported with "from subprocess import *".
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Release 2.5, documentation updated on 19th September, 2006.