Get selected components indices using Maya API #Snippet

get_selected_components.py

import maya.OpenMaya as om

# To remove duplicates: ids = list(set(ids))
def get_selected_comp_ids():
    sel = om.MSelectionList()
    om.MGlobal.getActiveSelectionList(sel)
    li = 0
    path = om.MDagPath()
    comp = om.MObject()
    stat = sel.getDagPath(li, path, comp)
    compFn = om.MFnSingleIndexedComponent(comp)
    ids = om.MIntArray()
    compFn.getElements(ids)
    return ids
    
print get_selected_comp_ids()