{"record":{"id":"e4e9b9b6d7bbcf07","repo":"keras-team/keras","slug":"attention-axes-must-be-an-int-list-or-tuple-re","errorCode":null,"errorMessage":"`attention_axes` must be an int, list, or tuple.Received: attention_axes={attention_axes}","messagePattern":"`attention_axes` must be an int, list, or tuple\\.Received: attention_axes=(.+?)","errorType":"exception","errorClass":"ValueError","httpStatus":null,"severity":"error","filePath":"keras/src/layers/attention/multi_head_attention.py","lineNumber":186,"sourceCode":"            except:\n                raise ValueError(\n                    f\"Invalid `output_shape`: {output_shape}. When \"\n                    \"specified, the `output_shape` should be of type tuple, \"\n                    \"list, or int.\"\n                )\n        self._output_shape = output_shape\n        self._flash_attention = flash_attention or is_flash_attention_enabled()\n        self._kernel_initializer = initializers.get(kernel_initializer)\n        self._bias_initializer = initializers.get(bias_initializer)\n        self._kernel_regularizer = regularizers.get(kernel_regularizer)\n        self._bias_regularizer = regularizers.get(bias_regularizer)\n        self._activity_regularizer = regularizers.get(activity_regularizer)\n        self._kernel_constraint = constraints.get(kernel_constraint)\n        self._bias_constraint = constraints.get(bias_constraint)\n        if isinstance(attention_axes, int):\n            attention_axes = (attention_axes,)\n        elif attention_axes and not isinstance(attention_axes, (list, tuple)):\n            raise ValueError(\n                \"`attention_axes` must be an int, list, or tuple.\"\n                f\"Received: attention_axes={attention_axes}\"\n            )\n        self._attention_axes = attention_axes\n        if sliding_window is not None and (\n            not isinstance(sliding_window, int) or sliding_window <= 0\n        ):\n            raise ValueError(\n                \"`sliding_window` must be `None` or a positive integer. \"\n                f\"Received: sliding_window={sliding_window}\"\n            )\n        self._sliding_window = sliding_window\n        self.seed = seed\n\n        self._inverse_sqrt_key_dim = 1.0 / math.sqrt(float(self._key_dim))\n\n        # Check for flash attention constraints\n        if self._flash_attention and self._dropout > 0.0:","sourceCodeStart":168,"sourceCodeEnd":204,"githubUrl":"https://github.com/keras-team/keras/blob/7a34a03db60bf60042242d6a556fc3be119046a5/keras/src/layers/attention/multi_head_attention.py#L168-L204","documentation":"Error \"`attention_axes` must be an int, list, or tuple.Received: attention_axes={attention_axes}\" thrown in keras-team/keras.","triggerScenarios":"Thrown at keras/src/layers/attention/multi_head_attention.py:186 when the library encounters an invalid state.","commonSituations":"See trigger scenarios.","solutions":[],"exampleFix":null,"handlingStrategy":null,"validationCode":null,"typeGuard":null,"tryCatchPattern":null,"preventionTips":[],"tags":[],"backgroundTag":null,"analyzedSha":"7a34a03db60bf60042242d6a556fc3be119046a5","analyzedAt":"2026-08-25T21:25:25.994Z","schemaVersion":2},"datasetVersion":"2026-08-26T02:17:13.382Z"}