Reorder layer in selected group

ReorderSelectGroup.py

# Algorithm for QGIS console
# first select group
# repeat to reverse order

from collections import OrderedDict

root = QgsProject.instance().layerTreeRoot()
group_sel = iface.layerTreeView().selectedNodes()
group = root.findGroup(group_sel[0].name())
if root.findGroup(group_sel[0].name()):
    if 'rev' not in locals():
        rev = True
        sort_order = 'descending'
    else:
        if rev == True :
            rev = False
            sort_order = 'ascending'
        else:
            rev = True
            sort_order = 'descending'

    LyrInGroup = lambda listCh:{listCh[lyr[0]].name()+str(lyr[0]):lyr[1] for lyr in enumerate(listCh)}
        
    lyr_names = LyrInGroup(group.children())
    lyr_keys = OrderedDict(sorted(LyrInGroup(group.children()).items(), reverse=rev)).keys()

    lyr_sorted = [lyr_names[k].clone() for k in lyr_keys]
    group.insertChildNodes(0,lyr_sorted)
    for n in lyr_names.values():
        group.removeChildNode(n)
    
    print('group ordered ' + sort_order.upper())
else:
    print('NOT A GROUP')