code: def new(self, command, attach=""):
          
          r = self._h._http_resource(
              method='POST',
              resource=('apps', self.app.name, 'ps',),
              data={'attach': attach, 'command': command}
          )
  
          r.raise_for_status()
          return self.app.processes[r.json()['process']]
docs: Creates a new Process
          Attach: If attach=True it will return a rendezvous connection point, for streaming stdout/stderr
          Command: The actual command it will run