fix validation option for dreambooth training example (#4317)

examples/dreambooth/train_dreambooth.py

@@ -14,6 +14,7 @@
 # See the License for the specific language governing permissions and
 
 import argparse
+import copy
 import gc
 import hashlib
 import itertools
@@ -1116,7 +1117,7 @@ def main(args):
     # We need to initialize the trackers we use, and also store our configuration.
     # The trackers initializes automatically on the main process.
     if accelerator.is_main_process:
-        tracker_config = vars(args)
+        tracker_config = vars(copy.deepcopy(args))
         tracker_config.pop("validation_images")
         accelerator.init_trackers("dreambooth", config=tracker_config)
 

examples/dreambooth/train_dreambooth_lora.py

@@ -14,6 +14,7 @@
 # See the License for the specific language governing permissions and
 
 import argparse
+import copy
 import gc
 import hashlib
 import itertools
@@ -1067,7 +1068,7 @@ def main(args):
     # We need to initialize the trackers we use, and also store our configuration.
     # The trackers initializes automatically on the main process.
     if accelerator.is_main_process:
-        tracker_config = vars(args)
+        tracker_config = vars(copy.deepcopy(args))
         tracker_config.pop("validation_images")
         accelerator.init_trackers("dreambooth-lora", config=tracker_config)