Pin Keras for now (#26904)

* Pin Keras for now out of paranoia

* Add the keras pin to _tests_requirements.txt too

* Make sure the Keras version matches the TF one

* make fixup

examples/tensorflow/_tests_requirements.txt

 tensorflow<2.15
+keras<2.15
 tensorboard
 scikit-learn
 seqeval

setup.py

@@ -125,6 +125,8 @@ _deps = [
     "jaxlib>=0.4.1,<=0.4.13",
     "jieba",
     "kenlm",
+    # Keras pin - this is to make sure Keras 3 doesn't destroy us. Remove or change when we have proper support.
+    "keras<2.15",
     "keras-nlp>=0.3.1",
     "librosa",
     "nltk",

src/transformers/dependency_versions_table.py

@@ -32,6 +32,7 @@ deps = {
     "jaxlib": "jaxlib>=0.4.1,<=0.4.13",
     "jieba": "jieba",
     "kenlm": "kenlm",
+    "keras": "keras<2.15",
     "keras-nlp": "keras-nlp>=0.3.1",
     "librosa": "librosa",
     "nltk": "nltk",