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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 load_module(self, module_name, path=None):
        '''Import a module into this isolation context and return a proxy for it.'''
        self.ensure_started()
        if path is None:
            path = sys.path
        mod = self.client.call(_load_module, module_name, path)
        mod.__isolation_context__ = self
        return mod