code: def open_dxfile(dxid, project=None, mode=None, read_buffer_size=dxfile.DEFAULT_BUFFER_SIZE):
      '''
      :param dxid: file ID
      :type dxid: string
      :rtype: :class:`~dxpy.bindings.dxfile.DXFile`
  
      Given the object ID of an uploaded file, returns a remote file
      handler that is a Python file-like object.
  
      Example::
  
        with open_dxfile("file-xxxx") as fd:
            for line in fd:
                ...
  
      Note that this is shorthand for::
  
        DXFile(dxid)
  
      '''
      return DXFile(dxid, project=project, mode=mode, read_buffer_size=read_buffer_sizef open_dxfile(dxid, project=None, mode=None, read_buffer_size=dxfile.DEFAULT_BUFFER_SIZE):
      '''
      :param dxid: file ID
      :type dxid: string
      :rtype: :class:`~dxpy.bindings.dxfile.DXFile`
  
      Given the object ID of an uploaded file, returns a remote file
      handler that is a Python file-like object.
  
      Example::
  
        with open_dxfile("file-xxxx") as fd:
            for line in fd:
                ...
  
      Note that this is shorthand for::
  
        DXFile(dxid)
  
      '''
      return DXFile(dxid, project=project, mode=mode, read_buffer_size=read_buffer_size)
docs: :param dxid: file ID
      :type dxid: string
      :rtype: :class:`~dxpy.bindings.dxfile.DXFile`
  
      Given the object ID of an uploaded file, returns a remote file
      handler that is a Python file-like object.
  
      Example::
  
        with open_dxfile("file-xxxx") as fd:
            for line in fd:
                ...
  
      Note that this is shorthand for::
  
        DXFile(dxid)