code: def call(cmd,
           timeout=None,
           signum=signal.SIGKILL,
           keep_rc=False,
           encoding="utf-8",
           env=os.environ):
      
  
      if not isinstance(cmd, list):
          cmd = [cmd]
  
      p = Pipeline(*cmd, timeout=timeout, signum=signum, env=env)
      res = p(keep_rc=keep_rc)
  
      if keep_rc:
          rc, output = res
          output = output.decode(encoding, 'ignore')
          return rc, output
      return res.decode(encoding, "ignore")
docs: Execute a cmd or list of commands with an optional timeout in seconds.
  
      If `timeout` is supplied and expires, the process is killed with
      SIGKILL (kill -9) and an exception is raised. Otherwise, the command
      output is returned.
  
      Parameters
      ----------
      cmd: str or [[str]]
          The command(s) to execute
      timeout: int
          Seconds before kill is issued to the process
      signum: int
          The signal number to issue to the process on timeout
      keep_rc: bool
          Whether to return the exit code along with the output
      encoding: str
          unicode decoding scheme to use. Default is "utf-8"
      env: dict
          The environment in which to execute commands. Default is os.environ
  
      Returns
      -------
      str
          Content of stdout of cmd on success.
  
      Raises
      ------
          CalledProcessError
              Raised when cmd fails