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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 _iparam_namespace_from_namespace(self, obj):
 # pylint: disable=invalid-name, """ Determine the namespace from a namespace string, or `None`. The default namespace of the connection object is used, if needed. Return the so determined namespace for use as an argument to imethodcall(). """


        if isinstance(obj, six.string_types):
            namespace = obj.strip('/')
        elif obj is None:
            namespace = obj
        else:
            raise TypeError(
                _format("The 'namespace' argument of the WBEMConnection "
                        "operation has invalid type {0} (must be None, or a "
                        "string)",
                        type(obj)))
        if namespace is None:
            namespace = self.default_namespace
        return namespace