def _launchWorkers(self, cmdLine, numWorkers):
self._workers = []<EOL>for i in range(numWorkers):<EOL><INDENT>stdout = tempfile.NamedTemporaryFile(delete=False)<EOL>stderr = tempfile.NamedTemporaryFile(delete=False)<EOL>p = subprocess.Popen(cmdLine, bufsize=<NUM_LIT:1>, env=os.environ, shell=True,<EOL>stdin=None, stdout=stdout, stderr=stderr)<EOL>p._stderr_file = stderr<EOL>p._stdout_file = stdout<EOL>self._workers.append(p)<EOL><DEDENT>
Launch worker processes to execute the given command line

        Parameters:
        -----------------------------------------------
        cmdLine: The command line for each worker
        numWorkers: number of workers to launch