def getExcludes(backendName):
    """ getExcludes(backendName)
    
    Get a list of excludes. If using the 'wx' backend, you don't
    want all the qt4 libaries.
    
    backendName is the name of the backend which you do want to use.
    
    """
    
    # init
    excludes = []
    
    # Neglect qt4
    if 'qt4' != backendName:
        excludes.extend(["sip", "PyQt4", "PyQt4.QtCore", "PyQt4.QtGui"])
    
    # Neglect wx
    if 'wx' != backendName:
        excludes.extend(["wx"])
    
    # done
    return excludes