class_docstr: Widget used to display or control data from a hierarchy of Parameters
class_docstr_tok: ["Widget","used","to","display","or","control","data","from","a","hierarchy","of","Parameters"]
code: def focusPrevious(self, item):
      self.focusNext(item, forward=False)
  
file_path: pyqtgraph/pyqtgraph/parametertree/ParameterTree.py
imports: from .parameterTypes import GroupParameterItem
  from ..Qt import QtCore, QtWidgets, mkQApp
  from ..widgets.TreeWidget import TreeWidget
  from .ParameterItem import ParameterItem
label_desc: Use image node_id 6 for calling the ParameterTree obj's underlying member method code with example usage: obj.focusPrevious(item) without return types