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Provides the 'spawn()' function, a front-end to various platform-
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Also provides the 'find_executable()' to search the path for a given
executable name.
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j } nB# t, $ r5} t. s| d } t1 d| d| j d | d} ~ ww xY w| r$t. s| d } t1 d| d| dS )a Run another program, specified as a command list 'cmd', in a new process.
'cmd' is just the argument list for the new process, ie.
cmd[0] is the program to run and cmd[1:] are the rest of its arguments.
There is no way to run a program with a name different from that of its
executable.
If 'search_path' is true (the default), the system's executable
search path will be used to find the program; otherwise, cmd[0]
must be the exact path to the executable. If 'dry_run' is true,
the command will not actually be run.
Raise DistutilsExecError if running the program fails in any way; just
return on success.
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