Refactor and clean-up type_util module (streamlit#9022)

## Describe your changes

The `type_util` module contains various, mostly unrelated functionality.
This PR moves many utility functions to new or better utility modules.
It contains no logical changes; it only moves existing methods around.

## Testing Plan

- No logical changes -> no new tests required.

---

**Contribution License Agreement**

By submitting this pull request you agree that all contributions to this
project are made under the Apache 2.0 license.

e2e_playwright/shared/data_mocks.py

@@ -21,7 +21,7 @@
 import pandas as pd
 import pyarrow as pa
 
-from streamlit.type_util import DataFormat
+from streamlit.dataframe_util import DataFormat
 
 np.random.seed(0)
 random.seed(0)

e2e_playwright/st_data_editor_input_data.py

@@ -19,7 +19,7 @@
 
 import streamlit as st
 from shared.data_mocks import SHARED_TEST_CASES, TestCaseMetadata
-from streamlit.type_util import DataFormat
+from streamlit.dataframe_util import DataFormat
 
 np.random.seed(0)
 random.seed(0)

lib/streamlit/components/v1/component_arrow.py

@@ -20,7 +20,7 @@
 
 from typing import TYPE_CHECKING, Any
 
-from streamlit import type_util
+from streamlit import dataframe_util, type_util
 from streamlit.elements.lib import pandas_styler_utils
 
 if TYPE_CHECKING:
@@ -29,6 +29,11 @@
     from streamlit.proto.Components_pb2 import ArrowTable as ArrowTableProto
 
 
+def _maybe_tuple_to_list(item: Any) -> Any:
+    """Convert a tuple to a list. Leave as is if it's not a tuple."""
+    return list(item) if isinstance(item, tuple) else item
+
+
 def marshall(
     proto: ArrowTableProto, data: Any, default_uuid: str | None = None
 ) -> None:
@@ -43,10 +48,10 @@ def marshall(
         Something that is or can be converted to a dataframe.
 
     """
-    if type_util.is_pandas_styler(data):
+    if dataframe_util.is_pandas_styler(data):
         pandas_styler_utils.marshall_styler(proto, data, default_uuid)  # type: ignore
 
-    df = type_util.convert_anything_to_df(data)
+    df = dataframe_util.convert_anything_to_df(data)
     _marshall_index(proto, df.index)
     _marshall_columns(proto, df.columns)
     _marshall_data(proto, df)
@@ -67,9 +72,9 @@ def _marshall_index(proto: ArrowTableProto, index: Index) -> None:
     """
     import pandas as pd
 
-    index = map(type_util.maybe_tuple_to_list, index.values)
+    index = map(_maybe_tuple_to_list, index.values)
     index_df = pd.DataFrame(index)
-    proto.index = type_util.data_frame_to_bytes(index_df)
+    proto.index = dataframe_util.data_frame_to_bytes(index_df)
 
 
 def _marshall_columns(proto: ArrowTableProto, columns: Series) -> None:
@@ -87,9 +92,9 @@ def _marshall_columns(proto: ArrowTableProto, columns: Series) -> None:
     """
     import pandas as pd
 
-    columns = map(type_util.maybe_tuple_to_list, columns.values)
+    columns = map(_maybe_tuple_to_list, columns.values)
     columns_df = pd.DataFrame(columns)
-    proto.columns = type_util.data_frame_to_bytes(columns_df)
+    proto.columns = dataframe_util.data_frame_to_bytes(columns_df)
 
 
 def _marshall_data(proto: ArrowTableProto, df: DataFrame) -> None:
@@ -104,7 +109,7 @@ def _marshall_data(proto: ArrowTableProto, df: DataFrame) -> None:
         A dataframe to marshall.
 
     """
-    proto.data = type_util.data_frame_to_bytes(df)
+    proto.data = dataframe_util.data_frame_to_bytes(df)
 
 
 def arrow_proto_to_dataframe(proto: ArrowTableProto) -> DataFrame:
@@ -125,9 +130,9 @@ def arrow_proto_to_dataframe(proto: ArrowTableProto) -> DataFrame:
 
     import pandas as pd
 
-    data = type_util.bytes_to_data_frame(proto.data)
-    index = type_util.bytes_to_data_frame(proto.index)
-    columns = type_util.bytes_to_data_frame(proto.columns)
+    data = dataframe_util.bytes_to_data_frame(proto.data)
+    index = dataframe_util.bytes_to_data_frame(proto.index)
+    columns = dataframe_util.bytes_to_data_frame(proto.columns)
 
     return pd.DataFrame(
         data.values, index=index.values.T.tolist(), columns=columns.values.T.tolist()

lib/streamlit/components/v1/custom_component.py

@@ -18,6 +18,7 @@
 from typing import TYPE_CHECKING, Any
 
 from streamlit.components.types.base_custom_component import BaseCustomComponent
+from streamlit.dataframe_util import is_dataframe_like
 from streamlit.delta_generator import main_dg
 from streamlit.elements.form import current_form_id
 from streamlit.elements.lib.policies import check_cache_replay_rules
@@ -29,7 +30,7 @@
 from streamlit.runtime.scriptrunner import get_script_run_ctx
 from streamlit.runtime.state import NoValue, register_widget
 from streamlit.runtime.state.common import compute_widget_id
-from streamlit.type_util import is_bytes_like, is_dataframe_like, to_bytes
+from streamlit.type_util import is_bytes_like, to_bytes
 
 if TYPE_CHECKING:
     from streamlit.delta_generator import DeltaGenerator