module 'tensorflow.python.keras.api._v1.keras.datasets.mnist' has no attribute 'train'

This error message suggests that there is an issue with the code related to the TensorFlow Keras MNIST dataset. It appears that the code is trying to access a "train" attribute in the "mnist" module, but this attribute does not exist.

One potential solution is to check the version of TensorFlow and Keras being used, as different versions may have different module attributes. Additionally, it may be helpful to review the code for any typos or syntax errors that could be causing the issue.

Another possibility is that the code is attempting to use an outdated or deprecated function. In this case, updating the code to use a newer function or method may resolve the issue.

Overall, without seeing the specific code and context in which this error occurred, it is difficult to provide a more specific solution.