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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 list_outputs(self):
 """Lists all the outputs in the symbol. Example ------- ['_plus12_output'] Returns ------- list of str List of all the outputs. For most symbols, this list contains only the name of this symbol. For symbol groups, this is a list with the names of all symbols in the group. """

        size = ctypes.c_uint()
        sarr = ctypes.POINTER(ctypes.c_char_p)()
        check_call(_LIB.MXSymbolListOutputs(
            self.handle, ctypes.byref(size), ctypes.byref(sarr)))
        return [py_str(sarr[i]) for i in range(size.value)]