def execute(self):
<EOL>process = Popen(self.command, stdout=PIPE, stderr=PIPE, shell=True)<EOL>(output, error) = process.communicate()<EOL>if process.returncode != <NUM_LIT:0>:  <EOL><INDENT>return self._decode_output(error)<EOL><DEDENT>return self._decode_output(output)<EOL>
Execute the given command.

:return: The output of the command.
:rtype: str