Fix gradio/components/dataframe.py not to import pandas.io (#7840)

* Fix gradio/components/dataframe.py not to import `pandas.io`

* add changeset

* add changeset

* Fix

---------

Co-authored-by: gradio-pr-bot <gradio-pr-bot@users.noreply.github.com>

.changeset/solid-cars-spend.md

@@ -0,0 +1,5 @@
+---
+"gradio": patch
+---
+
+feat:Fix gradio/components/dataframe.py not to import `pandas.io`

gradio/components/dataframe.py

@@ -19,14 +19,14 @@
 import pandas as pd
 import semantic_version
 from gradio_client.documentation import document
-from pandas.io.formats.style import Styler
 
 from gradio.components import Component
 from gradio.data_classes import GradioModel
 from gradio.events import Events
 
 if TYPE_CHECKING:
     import polars as pl  # type: ignore
+    from pandas.io.formats.style import Styler
 
 
 def _is_polars_available():
@@ -236,6 +236,8 @@ def postprocess(
         Returns:
             the uploaded spreadsheet data as an object with `headers` and `data` attributes
         """
+        from pandas.io.formats.style import Styler
+
         if value is None:
             return self.postprocess(self.empty_input)
         if isinstance(value, dict):