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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 get_template_amplitude_norm(template=None, **kwargs):
 """ Return additional constant template normalization. This only affects the effective distance calculation. Returns None for all templates with a physically meaningful amplitude. """

    input_params = props(template,**kwargs)
    approximant = kwargs['approximant']

    if approximant in _template_amplitude_norms:
        return _template_amplitude_norms[approximant](**input_params)
    else:
        return None