Introduces a temporary cap for Cython because new alpha releases of C…

…ython doesn't work with pycocotools which is installed by 'tensorflow-ranking'.

Because Cython is already a dependency of tensorflow-ranking, this change doesn't add a new dependency.

And we need to install Cython separately in order to succeed the pycocotools installation. It seems like an issue in pycocotools or pip, but added a workaround temporarily.

PiperOrigin-RevId: 449927854

.github/workflows/ci-test.yml

@@ -55,6 +55,8 @@ jobs:
     - name: Install dependencies
       run: |
         python -m pip install --upgrade pip wheel
+        # TODO(b/232490018): Cython need to be installed separately to build pycocotools.
+        python -m pip install Cython -c ./test_constraints.txt
         TFX_DEPENDENCY_SELECTOR=NIGHTLY pip install -c ./test_constraints.txt --extra-index-url https://pypi-nightly.tensorflow.org/simple --pre --editable .[all]
 
     - name: Run unit tests

test_constraints.txt

@@ -10,3 +10,6 @@
 
 # TODO(b/220800338): Workaround for markupsafe.
 markupsafe<2.1.0
+
+# TODO(b/232490018) Remove pinned Cython after pycocotools issue resolved.
+Cython<1