class_docstr: Extends QTableWidget with some useful functions for automatic data handling
  and copy / export context menu. Can automatically format and display a variety
  of data types (see :func:`setData() <pyqtgraph.TableWidget.setData>` for more
  information.
docstr: Copy selected data to clipboard.
docstr_tok: ["Copy","selected","data","to","clipboard","."]
code: def copySel(self):
      """Copy selected data to clipboard."""
      QtWidgets.QApplication.clipboard().setText(
          self.serialize(useSelection=True)
      )
  
imports: import numpy
  from ..Qt import QtCore, QtGui, QtWidgets
label_desc: Use image node_id 17 for calling the TableWidget obj's underlying member method code with example usage: obj.copySel() without return types