python3Packages.layoutparser: fix build failure

Author: pbsds

pkgs/development/python-modules/layoutparser/default.nix

@@ -54,6 +54,11 @@ buildPythonPackage {
     hash = "sha256-qBzcIUmgnGy/Xn/B+7UrLrRhCvCkapL+ymqGS2sMVgA=";
   };
 
+  patches = [
+    # https://github.com/Layout-Parser/layout-parser/pull/230
+    ./pandas-v3.patch
+  ];
+
   propagatedBuildInputs = [
     numpy
     opencv-python

pkgs/development/python-modules/layoutparser/pandas-v3.patch

@@ -0,0 +1,13 @@
+diff --git a/src/layoutparser/io/basic.py b/src/layoutparser/io/basic.py
+index 0b2df36..26dcccc 100644
+--- a/src/layoutparser/io/basic.py
++++ b/src/layoutparser/io/basic.py
+@@ -127,7 +127,7 @@ def load_dataframe(df: pd.DataFrame, block_type: str = None) -> Layout:
+     """
+     df = df.copy()
+     if "points" in df.columns:
+-        if df["points"].dtype == object:
++        if df["points"].dtype == object or isinstance(df["points"].dtype, pd.StringDtype):
+             df["points"] = df["points"].map(
+                 lambda x: ast.literal_eval(x) if not pd.isna(x) else x
+             )