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Provides the 'spawn()' function, a front-end to various platform-
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specific functions for launching another program in a sub-process.
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Also provides the 'find_executable()' to search the path for a given
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executable name.
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'cmd' is just the argument list for the new process, ie.
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There is no way to run a program with a name different from that of its
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executable.
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If 'search_path' is true (the default), the system's executable
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search path will be used to find the program; otherwise, cmd[0]
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must be the exact path to the executable. If 'dry_run' is true,
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the command will not actually be run.
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Raise DistutilsExecError if running the program fails in any way; just
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return on success.
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| r | Sq Wd S| Sd S( sÚ Tries to find 'executable' in the directories listed in 'path'.
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A string listing directories separated by 'os.pathsep'; defaults to
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os.environ['PATH']. Returns the complete filename or None if not found.
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