ENH: Add and update XML io interface

Author: Kevin Sheppard

pandas-stubs/core/frame.pyi

@@ -48,8 +48,10 @@ from pandas._typing import (
     Axes,
     Axis,
     AxisType,
+    CompressionOptions,
     Dtype,
     DtypeNp,
+    FilePath,
     FilePathOrBuffer,
     FilePathOrBytesBuffer,
     GroupByObjectNonScalar,
@@ -61,12 +63,15 @@ from pandas._typing import (
     Label,
     Level,
     MaskType,
+    ReadBuffer,
     Renamer,
     Scalar,
     ScalarT,
     SeriesAxisType,
+    StorageOptions,
     StrLike,
     T as TType,
+    WriteBuffer,
     np_ndarray_bool,
     np_ndarray_str,
     num,
@@ -332,6 +337,25 @@ class DataFrame(NDFrame, OpsMixin):
         render_links: _bool = ...,
         encoding: _str | None = ...,
     ) -> _str: ...
+    def to_xml(
+        self,
+        path_or_buffer: FilePath | WriteBuffer[bytes] | WriteBuffer[str] | None = ...,
+        index: bool = ...,
+        root_name: str | None = ...,
+        row_name: str | None = ...,
+        na_rep: str | None = ...,
+        attr_cols: list[str] | None = ...,
+        elem_cols: list[str] | None = ...,
+        namespaces: dict[str | None, str] | None = ...,
+        prefix: str | None = ...,
+        encoding: str = ...,
+        xml_declaration: bool | None = ...,
+        pretty_print: bool | None = ...,
+        parser: str | None = ...,
+        stylesheet: FilePath | ReadBuffer[str] | ReadBuffer[bytes] | None = ...,
+        compression: CompressionOptions = ...,
+        storage_options: StorageOptions = ...,
+    ) -> str | None: ...
     def info(
         self, verbose=..., buf=..., max_cols=..., memory_usage=..., null_counts=...
     ) -> None: ...

pandas-stubs/io/pickle.pyi

@@ -11,7 +11,7 @@ from pandas._typing import (
 )
 
 def to_pickle(
-    obj: Any,
+    obj: object,
     filepath_or_buffer: FilePath | WriteBuffer[bytes],
     compression: CompressionOptions = ...,
     protocol: int = ...,

pandas-stubs/io/xml.pyi

@@ -25,11 +25,10 @@ def read_xml(
     dtype: DtypeArg | None = ...,
     converters: ConvertersArg | None = ...,
     parse_dates: ParseDatesArg | None = ...,
-    # encoding can not be None for lxml and StringIO input
     encoding: str | None = ...,
-    parser: XMLParsers | None = ...,
+    parser: XMLParsers = ...,
     stylesheet: FilePath | ReadBuffer[bytes] | ReadBuffer[str] | None = ...,
     iterparse: dict[str, list[str]] | None = ...,
-    compression: CompressionOptions | None = ...,
-    storage_options: StorageOptions | None = ...,
+    compression: CompressionOptions = ...,
+    storage_options: StorageOptions = ...,
 ) -> DataFrame: ...