Pin pydantic to < 2.0.0 (#37000) (#37018)

2.0.0 brings breaking changes Here's a failed CI run: https://buildkite.com/ray-project/oss-ci-build-pr/builds/27338#01890d26-94ff-42f2-80be-c2ac0a86e8d3/447-762
ray-project · Jul 3, 2023 · 879249b · 879249b
1 parent 2441e73
commit 879249b
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diff --git a/python/requirements.txt b/python/requirements.txt
@@ -60,5 +60,5 @@ starlette
 typer
 fsspec
 pandas>=1.3
-pydantic
+pydantic<2
 py-spy>=0.2.0
diff --git a/python/setup.py b/python/setup.py
@@ -250,7 +250,7 @@ def get_packages(self):
             "requests",
             "gpustat >= 1.0.0",  # for windows
             "opencensus",
-            "pydantic",
+            "pydantic < 2",  # 2.0.0 brings breaking changes
             "prometheus_client >= 0.7.1",
             "smart_open",
             "virtualenv >=20.0.24, < 20.21.1",  # For pip runtime env.