module 'tomopy' has no attribute 'read_tiff_stack'

This error message suggests that the 'read_tiff_stack' function is not a valid attribute of the 'tomopy' module.

There could be a few reasons why this error is occurring:

1. The 'read_tiff_stack' function may not be included in the version of the 'tomopy' module you are using. You can check the documentation or release notes for your version of 'tomopy' to see if this function is supported.

2. It's possible that you misspelled the name of the function or used incorrect syntax when calling it. Double-check your code to make sure you are using the correct name and syntax for the 'read_tiff_stack' function.

3. There may be an issue with your installation of 'tomopy'. Try reinstalling the module or updating to a newer version to see if that resolves the issue.