From 46048366b6f39046b116e0280bb93b986f164c94 Mon Sep 17 00:00:00 2001
From: Peter Morgan <morganpeter@google.com>
Date: Thu, 23 Apr 2026 08:37:52 -0700
Subject: [PATCH] No public description

PiperOrigin-RevId: 904474869
---
 google/genai/_interactions/_qs.py           |  11 +-
 google/genai/_interactions/_types.py        |   3 +
 google/genai/_interactions/_utils/_utils.py | 188 ++++++++++++--------
 3 files changed, 119 insertions(+), 83 deletions(-)

diff --git a/google/genai/_interactions/_qs.py b/google/genai/_interactions/_qs.py
index 64261b457..e55582a72 100644
--- a/google/genai/_interactions/_qs.py
+++ b/google/genai/_interactions/_qs.py
@@ -15,19 +15,16 @@
 
 from __future__ import annotations
 
-from typing import Any, List, Tuple, Union, Mapping, TypeVar
+from typing import Any, List, Mapping, Tuple, TypeVar, Union
 from urllib.parse import parse_qs, urlencode
-from typing_extensions import Literal, get_args
 
-from ._types import NotGiven, not_given
+from typing_extensions import get_args
+
+from ._types import ArrayFormat, NestedFormat, NotGiven, not_given
 from ._utils import flatten
 
 _T = TypeVar("_T")
 
-
-ArrayFormat = Literal["comma", "repeat", "indices", "brackets"]
-NestedFormat = Literal["dots", "brackets"]
-
 PrimitiveData = Union[str, int, float, bool, None]
 # this should be Data = Union[PrimitiveData, "List[Data]", "Tuple[Data]", "Mapping[str, Data]"]
 # https://github.com/microsoft/pyright/issues/3555
diff --git a/google/genai/_interactions/_types.py b/google/genai/_interactions/_types.py
index d1c759d09..309e981f9 100644
--- a/google/genai/_interactions/_types.py
+++ b/google/genai/_interactions/_types.py
@@ -62,6 +62,9 @@
 ModelT = TypeVar("ModelT", bound=pydantic.BaseModel)
 _T = TypeVar("_T")
 
+ArrayFormat = Literal["comma", "repeat", "indices", "brackets"]
+NestedFormat = Literal["dots", "brackets"]
+
 
 # Approximates httpx internal ProxiesTypes and RequestFiles types
 # while adding support for `PathLike` instances
diff --git a/google/genai/_interactions/_utils/_utils.py b/google/genai/_interactions/_utils/_utils.py
index f79f86ca8..fa75e0f64 100644
--- a/google/genai/_interactions/_utils/_utils.py
+++ b/google/genai/_interactions/_utils/_utils.py
@@ -16,28 +16,28 @@
 # mypy: ignore-errors
 from __future__ import annotations
 
+from datetime import date, datetime
+import functools
+import inspect
 import os
+from pathlib import Path
 import re
-import inspect
-import functools
 from typing import (
     Any,
-    Tuple,
-    Mapping,
-    TypeVar,
     Callable,
     Iterable,
+    Mapping,
     Sequence,
+    Tuple,
+    TypeVar,
     cast,
     overload,
 )
-from pathlib import Path
-from datetime import date, datetime
-from typing_extensions import TypeGuard
 
 import sniffio
+from typing_extensions import TypeGuard, get_args
 
-from .._types import Omit, NotGiven, FileTypes, HeadersLike
+from .._types import ArrayFormat, FileTypes, HeadersLike, NotGiven, Omit
 
 _T = TypeVar("_T")
 _TupleT = TypeVar("_TupleT", bound=Tuple[object, ...])
@@ -56,17 +56,41 @@ def extract_files(
     query: Mapping[str, object],
     *,
     paths: Sequence[Sequence[str]],
+    array_format: ArrayFormat = "brackets",
 ) -> list[tuple[str, FileTypes]]:
-    """Recursively extract files from the given dictionary based on specified paths.
+  """Recursively extract files from the given dictionary based on specified paths.
 
-    A path may look like this ['foo', 'files', '<array>', 'data'].
+  A path may look like this ['foo', 'files', '<array>', 'data'].
 
-    Note: this mutates the given dictionary.
-    """
-    files: list[tuple[str, FileTypes]] = []
-    for path in paths:
-        files.extend(_extract_items(query, path, index=0, flattened_key=None))
-    return files
+  ``array_format`` controls how ``<array>`` segments contribute to the emitted
+  field name. Supported values: ``"brackets"`` (``foo[]``), ``"repeat"`` and
+  ``"comma"`` (``foo``), ``"indices"`` (``foo[0]``, ``foo[1]``).
+
+  Note: this mutates the given dictionary.
+  """
+  files: list[tuple[str, FileTypes]] = []
+  for path in paths:
+    files.extend(
+        _extract_items(
+            query, path, index=0, flattened_key=None, array_format=array_format
+        )
+    )
+  return files
+
+
+def _array_suffix(array_format: ArrayFormat, array_index: int) -> str:
+  if array_format == "brackets":
+    return "[]"
+  if array_format == "indices":
+    return f"[{array_index}]"
+  if array_format == "repeat" or array_format == "comma":
+    # Both repeat the bare field name for each file part; there is no
+    # meaningful way to comma-join binary parts.
+    return ""
+  raise NotImplementedError(
+      f"Unknown array_format value: {array_format}, choose from"
+      f" {', '.join(get_args(ArrayFormat))}"
+  )
 
 
 def _extract_items(
@@ -75,72 +99,78 @@ def _extract_items(
     *,
     index: int,
     flattened_key: str | None,
+    array_format: ArrayFormat,
 ) -> list[tuple[str, FileTypes]]:
+  try:
+    key = path[index]
+  except IndexError:
+    if not is_given(obj):
+      # no value was provided - we can safely ignore
+      return []
+
+    # cyclical import
+    from .._files import assert_is_file_content
+
+    # We have exhausted the path, return the entry we found.
+    assert flattened_key is not None
+
+    if is_list(obj):
+      files: list[tuple[str, FileTypes]] = []
+      for array_index, entry in enumerate(obj):
+        suffix = _array_suffix(array_format, array_index)
+        emitted_key = (flattened_key + suffix) if flattened_key else suffix
+        assert_is_file_content(entry, key=emitted_key)
+        files.append((emitted_key, cast(FileTypes, entry)))
+      return files
+
+    assert_is_file_content(obj, key=flattened_key)
+    return [(flattened_key, cast(FileTypes, obj))]
+
+  index += 1
+  if is_dict(obj):
     try:
-        key = path[index]
-    except IndexError:
-        if not is_given(obj):
-            # no value was provided - we can safely ignore
-            return []
-
-        # cyclical import
-        from .._files import assert_is_file_content
-
-        # We have exhausted the path, return the entry we found.
-        assert flattened_key is not None
-
-        if is_list(obj):
-            files: list[tuple[str, FileTypes]] = []
-            for entry in obj:
-                assert_is_file_content(entry, key=flattened_key + "[]" if flattened_key else "")
-                files.append((flattened_key + "[]", cast(FileTypes, entry)))
-            return files
-
-        assert_is_file_content(obj, key=flattened_key)
-        return [(flattened_key, cast(FileTypes, obj))]
-
-    index += 1
-    if is_dict(obj):
-        try:
-            # Remove the field if there are no more dict keys in the path,
-            # only "<array>" traversal markers or end.
-            if all(p == "<array>" for p in path[index:]):
-                item = obj.pop(key)
-            else:
-                item = obj[key]
-        except KeyError:
-            # Key was not present in the dictionary, this is not indicative of an error
-            # as the given path may not point to a required field. We also do not want
-            # to enforce required fields as the API may differ from the spec in some cases.
-            return []
-        if flattened_key is None:
-            flattened_key = key
-        else:
-            flattened_key += f"[{key}]"
-        return _extract_items(
+      # Remove the field if there are no more dict keys in the path,
+      # only "<array>" traversal markers or end.
+      if all(p == "<array>" for p in path[index:]):
+        item = obj.pop(key)
+      else:
+        item = obj[key]
+    except KeyError:
+      # Key was not present in the dictionary, this is not indicative of an error
+      # as the given path may not point to a required field. We also do not want
+      # to enforce required fields as the API may differ from the spec in some cases.
+      return []
+    if flattened_key is None:
+      flattened_key = key
+    else:
+      flattened_key += f"[{key}]"
+    return _extract_items(
+        item,
+        path,
+        index=index,
+        flattened_key=flattened_key,
+        array_format=array_format,
+    )
+  elif is_list(obj):
+    if key != "<array>":
+      return []
+
+    return flatten([
+        _extract_items(
             item,
             path,
             index=index,
-            flattened_key=flattened_key,
-        )
-    elif is_list(obj):
-        if key != "<array>":
-            return []
-
-        return flatten(
-            [
-                _extract_items(
-                    item,
-                    path,
-                    index=index,
-                    flattened_key=flattened_key + "[]" if flattened_key is not None else "[]",
-                )
-                for item in obj
-            ]
+            flattened_key=(
+                (flattened_key if flattened_key is not None else "")
+                + _array_suffix(array_format, array_index)
+            ),
+            array_format=array_format,
         )
+        for array_index, item in enumerate(obj)
+    ])
 
-    # Something unexpected was passed, just ignore it.
-    return []
+  # Something unexpected was passed, just ignore it.
+  return []
 
 
 def is_given(obj: _T | NotGiven | Omit) -> TypeGuard[_T]:
@@ -293,14 +323,20 @@ def wrapper(*args: object, **kwargs: object) -> object:
 
 
 @overload
+
+
 def strip_not_given(obj: None) -> None: ...
 
 
 @overload
+
+
 def strip_not_given(obj: Mapping[_K, _V | NotGiven]) -> dict[_K, _V]: ...
 
 
 @overload
+
+
 def strip_not_given(obj: object) -> object: ...