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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 save(self, filename, strip_prefix=''):
 """Save parameters to file. Parameters filename : str Path to parameter file. strip_prefix : str, default '' Strip prefix from parameter names before saving. """

        arg_dict = {}
        for param in self.values():
            weight = param._reduce()
            if not param.name.startswith(strip_prefix):
                raise ValueError(
                    "Prefix '%s' is to be striped before saving, but Parameter's "
                    "name '%s' does not start with '%s'. "
                    "this may be due to your Block shares parameters from other "
                    "Blocks or you forgot to use 'with name_scope()' when creating "
                    "child blocks. For more info on naming, please see "
                    "http://mxnet.incubator.apache.org/tutorials/basic/naming.html"%(
                        strip_prefix, param.name, strip_prefix))
            arg_dict[param.name[len(strip_prefix):]] = weight
        ndarray.save(filename, arg_dict)