From 1dbb31511e2a87e369d77e2219bca7e6aec0b167 Mon Sep 17 00:00:00 2001
From: Thomas Li <47963215+lithomas1@users.noreply.github.com>
Date: Mon, 27 Mar 2023 07:40:28 -0400
Subject: [PATCH 1/2] COMPAT: Update code for Cython 3.0b2

---
 .github/workflows/ubuntu.yml |  2 +-
 pandas/_libs/join.pyx        | 14 ++------------
 pandas/core/reshape/merge.py |  8 +-------
 3 files changed, 4 insertions(+), 20 deletions(-)

diff --git a/.github/workflows/ubuntu.yml b/.github/workflows/ubuntu.yml
index f990c6edaeb2a..2ea43b6b7e94f 100644
--- a/.github/workflows/ubuntu.yml
+++ b/.github/workflows/ubuntu.yml
@@ -74,7 +74,7 @@ jobs:
             test_args: "-W error::DeprecationWarning -W error::FutureWarning"
             # TODO(cython3): Re-enable once next-beta(after beta 1) comes out
             # There are some warnings failing the build with -werror
-            pandas_ci: "0"
+            #pandas_ci: "0"
         exclude:
           - env_file: actions-38.yaml
             pyarrow_version: "8"
diff --git a/pandas/_libs/join.pyx b/pandas/_libs/join.pyx
index 2b3b147470cef..c9e6223602480 100644
--- a/pandas/_libs/join.pyx
+++ b/pandas/_libs/join.pyx
@@ -850,17 +850,7 @@ def asof_join_nearest_on_X_by_Y(ndarray[numeric_t] left_values,
         numeric_t bdiff, fdiff
 
     # search both forward and backward
-    # TODO(cython3):
-    # Bug in beta1 preventing Cython from choosing
-    # right specialization when one fused memview is None
-    # Doesn't matter what type we choose
-    # (nothing happens anyways since it is None)
-    # GH 51640
-    if left_by_values is not None and left_by_values.dtype != object:
-        by_dtype = f"{left_by_values.dtype}_t"
-    else:
-        by_dtype = object
-    bli, bri = asof_join_backward_on_X_by_Y[f"{left_values.dtype}_t", by_dtype](
+    bli, bri = asof_join_backward_on_X_by_Y(
         left_values,
         right_values,
         left_by_values,
@@ -869,7 +859,7 @@ def asof_join_nearest_on_X_by_Y(ndarray[numeric_t] left_values,
         tolerance,
         use_hashtable
     )
-    fli, fri = asof_join_forward_on_X_by_Y[f"{left_values.dtype}_t", by_dtype](
+    fli, fri = asof_join_forward_on_X_by_Y(
         left_values,
         right_values,
         left_by_values,
diff --git a/pandas/core/reshape/merge.py b/pandas/core/reshape/merge.py
index c3dacc2172aa7..1b5d26c7a63a5 100644
--- a/pandas/core/reshape/merge.py
+++ b/pandas/core/reshape/merge.py
@@ -2161,13 +2161,7 @@ def injection(obj):
         else:
             # choose appropriate function by type
             func = _asof_by_function(self.direction)
-            # TODO(cython3):
-            # Bug in beta1 preventing Cython from choosing
-            # right specialization when one fused memview is None
-            # Doesn't matter what type we choose
-            # (nothing happens anyways since it is None)
-            # GH 51640
-            return func[f"{left_values.dtype}_t", object](
+            return func(
                 left_values,
                 right_values,
                 None,

From 054525978afdc004d3d4e176484149ca09bb250c Mon Sep 17 00:00:00 2001
From: Thomas Li <47963215+lithomas1@users.noreply.github.com>
Date: Mon, 27 Mar 2023 07:50:31 -0400
Subject: [PATCH 2/2] Update ubuntu.yml

---
 .github/workflows/ubuntu.yml | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/.github/workflows/ubuntu.yml b/.github/workflows/ubuntu.yml
index 2ea43b6b7e94f..f990c6edaeb2a 100644
--- a/.github/workflows/ubuntu.yml
+++ b/.github/workflows/ubuntu.yml
@@ -74,7 +74,7 @@ jobs:
             test_args: "-W error::DeprecationWarning -W error::FutureWarning"
             # TODO(cython3): Re-enable once next-beta(after beta 1) comes out
             # There are some warnings failing the build with -werror
-            #pandas_ci: "0"
+            pandas_ci: "0"
         exclude:
           - env_file: actions-38.yaml
             pyarrow_version: "8"