From 18057c1cbcbb32a17a081910e8bd6545e743ee6e Mon Sep 17 00:00:00 2001
From: Dongdong Tian <seisman.info@gmail.com>
Date: Thu, 12 Dec 2024 17:49:24 +0800
Subject: [PATCH] Improve the checking of dtypes

---
 pygmt/clib/conversion.py | 6 +++---
 1 file changed, 3 insertions(+), 3 deletions(-)

diff --git a/pygmt/clib/conversion.py b/pygmt/clib/conversion.py
index b86ce7016b7..e3531d04709 100644
--- a/pygmt/clib/conversion.py
+++ b/pygmt/clib/conversion.py
@@ -194,10 +194,10 @@ def _to_numpy(data: Any) -> np.ndarray:
             data = data.to_numpy(na_value=np.nan)
 
     # Deal with timezone-aware datetime dtypes.
-    if getattr(dtype, "tz", None):  # pandas.DatetimeTZDtype
+    if isinstance(dtype, pd.DatetimeTZDtype):  # pandas.DatetimeTZDtype
         numpy_dtype = getattr(dtype, "base", None)
-    elif getattr(dtype, "pyarrow_dtype", None) and hasattr(dtype.pyarrow_dtype, "tz"):
-        # pd.ArrayDtype[pa.Timestamp]
+    elif isinstance(dtype, pd.ArrowDtype) and hasattr(dtype.pyarrow_dtype, "tz"):
+        # pd.ArrowDtype[pa.Timestamp]
         numpy_dtype = getattr(dtype, "numpy_dtype", None)
         if Version(pd.__version__) < Version("2.1"):
             # In pandas 2.0, dtype.numpy_type is dtype("O").