def tbar_is_leptonic(reco_event, truth_event):
    """
        Determines whether tbar in the event is leptonic, or if it's hadronic 
        Does this by checking the sign of the charge lepton in the event.
        The charge of the lepton is NEGATVIE then the tbar is the leptonic top
            tbar > W-b > l-nub 
    
    """
    # Evaluate which lepton's charge to evaluate
    if len(reco_event.el_pt) > 0:
        return reco_event.el_charge[0] < 0
    else:
        return reco_event.mu_charge[0] < 0