Fixes mypy attribute issue in io/parquet by adding a hasattr check (pandas-dev#45570)

* Fixes mypy attribute issue in io/parquet by adding a hasattr check

* changed attr to name attribute inside raw

* combined the conditional checks on io.BufferedWriter in io/parquet

* changed attribute from raw.name to name and added hasattr check

* Skipped checks for graceful cleanup in windows

* Changed checks for path object in parquet, linted and sorted imports

* Removed sys dependency and changed pytest check for windows

* Changed the condition in io/parquet to hasattr from isinstance of io.FileIO

* Changed the pytest skip condition to decorator and added a message

* Changed pytest skipif to mark.xfail

Author: Anirudhsekar96

pandas/io/parquet.py

@@ -180,8 +180,12 @@ def write(
             mode="wb",
             is_dir=partition_cols is not None,
         )
-        if isinstance(path_or_handle, io.BufferedWriter):
-            path_or_handle = path_or_handle.raw.name
+        if (
+            isinstance(path_or_handle, io.BufferedWriter)
+            and hasattr(path_or_handle, "name")
+            and isinstance(path_or_handle.name, (str, bytes))
+        ):
+            path_or_handle = path_or_handle.name
 
         try:
             if partition_cols is not None:

pandas/tests/io/test_parquet.py

@@ -13,6 +13,7 @@
 
 from pandas._config import get_option
 
+from pandas.compat import is_platform_windows
 from pandas.compat.pyarrow import (
     pa_version_under2p0,
     pa_version_under5p0,
@@ -728,6 +729,13 @@ def test_unsupported_float16(self, pa):
         df = pd.DataFrame(data=data, columns=["fp16"])
         self.check_external_error_on_write(df, pa, pyarrow.ArrowException)
 
+    @pytest.mark.xfail(
+        is_platform_windows(),
+        reason=(
+            "PyArrow does not cleanup of partial files dumps when unsupported "
+            "dtypes are passed to_parquet function in windows"
+        ),
+    )
     @pytest.mark.parametrize("path_type", [str, pathlib.Path])
     def test_unsupported_float16_cleanup(self, pa, path_type):
         # #44847, #44914