diffusers

572d8e20 - Adding better way to define multiple concepts and also validation capabilities. (#3807)

Adding better way to define multiple concepts and also validation capabilities. (#3807) * - Added validation parameters - Changed some parameter descriptions to better explain their use. - Fixed a few typos. - Added concept_list parameter for better management of multiple subjects - changed logic for image validation * - Fixed bad logic for class data root directories * Defaulting validation_steps to None for an easier logic * Fixed multiple validation prompts * Fixed bug on validation negative prompt * Changed validation logic for tracker. * Added uuid for validation image labeling * Fix error when comparing validation prompts and validation negative prompts * Improved error message when negative prompts for validation are more than the number of prompts * - Changed image tracking number from epoch to global_step - Added Typing for functions * Added some validations more when using concept_list parameter and the regular ones. * Fixed error message * Added more validations for validation parameters * Improved messaging for errors * Fixed validation error for parameters with default values * - Added train step to image name for validation - reformatted code * - Added train step to image's name for validation - reformatted code * Updated README.md file. * reverted back original script of train_dreambooth.py * reverted back original script of train_dreambooth.py * left one blank line at the eof * reverted back setup.py * reverted back setup.py * added same logic for when parameters for prior preservation are used without enabling the flag while using concept_list parameter. * Ran black formatter. * fixed a few strings * fixed import sort with isort and removed fstrings without placeholder * fixed import order with ruff (since with isort wasn't ok) --------- Co-authored-by: Patrick von Platen <patrick.v.platen@gmail.com>