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Solve the following problem using Python, implementing the functions described below, one line at a time
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Description:
 def change_default_radii(def_map):
 """Change the default radii """

    s = current_system()
    rep = current_representation()
    rep.radii_state.default = [def_map[t] for t in s.type_array]
    rep.radii_state.reset()