Add validation of lr scheduler and optimizer arguments

README.md

@@ -417,6 +417,7 @@ ControlNet dataset is used to specify the mask. The mask images should be the RG
 ### 2024/04/220 (v24.0.6)
 
 - Make start and stop buttons visible in headless
+- Add validation for lr and optimizer arguments
 
 ### 2024/04/19 (v24.0.5)
 

kohya_gui/common_gui.py

@@ -1498,4 +1498,17 @@ def print_command_and_toml(run_cmd, tmpfilename):
         log.info(toml_file.read())
     log.info(f"end of toml config file: {tmpfilename}")
 
-    save_to_file(command_to_run)
+    save_to_file(command_to_run)
+
+def validate_args_setting(input_string):
+    # Regex pattern to handle multiple conditions:
+    # - Empty string is valid
+    # - Single or multiple key/value pairs with exactly one space between pairs
+    # - No spaces around '=' and no spaces within keys or values
+    pattern = r'^(\S+=\S+)( \S+=\S+)*$|^$'
+    if re.match(pattern, input_string):
+        return True
+    else:
+        log.info(f"'{input_string}' is not a valid settings string.")
+        log.info("A valid settings string must consist of one or more key/value pairs formatted as key=value, with no spaces around the equals sign or within the value. Multiple pairs should be separated by a space.")
+        return False

kohya_gui/dreambooth_gui.py

@@ -18,6 +18,7 @@
     scriptdir,
     update_my_data,
     validate_paths,
+    validate_args_setting,
 )
 from .class_accelerate_launch import AccelerateLaunch
 from .class_configuration_file import ConfigurationFile
@@ -491,19 +492,27 @@ def train_model(
     # Get list of function parameters and values
     parameters = list(locals().items())
     global train_state_value
-    
+
     TRAIN_BUTTON_VISIBLE = [
         gr.Button(visible=True),
         gr.Button(visible=False or headless),
         gr.Textbox(value=train_state_value),
     ]
-    
+
     if executor.is_running():
         log.error("Training is already running. Can't start another training session.")
         return TRAIN_BUTTON_VISIBLE
 
     log.info(f"Start training Dreambooth...")
 
+    log.info(f"Validating lr scheduler arguments...")
+    if not validate_args_setting(lr_scheduler_args):
+        return
+
+    log.info(f"Validating optimizer arguments...")
+    if not validate_args_setting(optimizer_args):
+        return
+
     # This function validates files or folder paths. Simply add new variables containing file of folder path
     # to validate below
     if not validate_paths(
@@ -808,9 +817,9 @@ def train_model(
         for key, value in config_toml_data.items()
         if value not in ["", False, None]
     }
-    
+
     config_toml_data["max_data_loader_n_workers"] = max_data_loader_n_workers
-    
+
     # Sort the dictionary by keys
     config_toml_data = dict(sorted(config_toml_data.items()))
 
@@ -861,7 +870,7 @@ def train_model(
         # Run the command
 
         executor.execute_command(run_cmd=run_cmd, use_shell=use_shell, env=env)
-        
+
         train_state_value = time.time()
 
         return (
@@ -950,7 +959,7 @@ def dreambooth_tab(
 
         global executor
         executor = CommandExecutor(headless=headless)
-        
+
         with gr.Column(), gr.Group():
             with gr.Row():
                 button_print = gr.Button("Print training command")
@@ -1102,9 +1111,9 @@ def dreambooth_tab(
             outputs=[configuration.config_file_name],
             show_progress=False,
         )
-        
+
         run_state = gr.Textbox(value=train_state_value, visible=False)
-            
+
         run_state.change(
             fn=executor.wait_for_training_to_end,
             outputs=[executor.button_run, executor.button_stop_training],
@@ -1118,7 +1127,8 @@ def dreambooth_tab(
         )
 
         executor.button_stop_training.click(
-            executor.kill_command, outputs=[executor.button_run, executor.button_stop_training]
+            executor.kill_command,
+            outputs=[executor.button_run, executor.button_stop_training],
         )
 
         button_print.click(

kohya_gui/finetune_gui.py

@@ -19,6 +19,7 @@
     scriptdir,
     update_my_data,
     validate_paths,
+    validate_args_setting
 )
 from .class_accelerate_launch import AccelerateLaunch
 from .class_configuration_file import ConfigurationFile
@@ -544,6 +545,14 @@ def train_model(
 
     log.info(f"Start Finetuning...")
 
+    log.info(f"Validating lr scheduler arguments...")
+    if not validate_args_setting(lr_scheduler_args):
+        return
+
+    log.info(f"Validating optimizer arguments...")
+    if not validate_args_setting(optimizer_args):
+        return
+
     if train_dir != "" and not os.path.exists(train_dir):
         os.mkdir(train_dir)
 

kohya_gui/lora_gui.py

@@ -20,6 +20,7 @@
     scriptdir,
     update_my_data,
     validate_paths,
+    validate_args_setting
 )
 from .class_accelerate_launch import AccelerateLaunch
 from .class_configuration_file import ConfigurationFile
@@ -679,6 +680,14 @@ def train_model(
 
     log.info(f"Start training LoRA {LoRA_type} ...")
 
+    log.info(f"Validating lr scheduler arguments...")
+    if not validate_args_setting(lr_scheduler_args):
+        return
+
+    log.info(f"Validating optimizer arguments...")
+    if not validate_args_setting(optimizer_args):
+        return
+
     if not validate_paths(
         output_dir=output_dir,
         pretrained_model_name_or_path=pretrained_model_name_or_path,

kohya_gui/textual_inversion_gui.py

@@ -20,6 +20,7 @@
     scriptdir,
     update_my_data,
     validate_paths,
+    validate_args_setting
 )
 from .class_accelerate_launch import AccelerateLaunch
 from .class_configuration_file import ConfigurationFile
@@ -505,6 +506,14 @@ def train_model(
 
     log.info(f"Start training TI...")
 
+    log.info(f"Validating lr scheduler arguments...")
+    if not validate_args_setting(lr_scheduler_args):
+        return
+
+    log.info(f"Validating optimizer arguments...")
+    if not validate_args_setting(optimizer_args):
+        return
+
     if not validate_paths(
         output_dir=output_dir,
         pretrained_model_name_or_path=pretrained_model_name_or_path,