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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:
 async def on_raw_cap_list(self, params):
 """ Update active capabilities. """

        self._capabilities = { capab: False for capab in self._capabilities }

        for capab in params[0].split():
            capab, value = self._capability_normalize(capab)
            self._capabilities[capab] = value if value else True