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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 child(self, subkey):
 """ Retrieves a subkey for this Registry key, given its name. @type subkey: str @param subkey: Name of the subkey. @rtype: L{RegistryKey} @return: Subkey. """

        path = self._path + '\\' + subkey
        handle = win32.RegOpenKey(self.handle, subkey)
        return RegistryKey(path, handle)