Refactor Series import to optimize scope and maintain consistency

Moved the `Series` import inside relevant function scopes to minimize unnecessary top-level imports and align with existing import patterns. This helps improve code readability and ensures imports are only loaded where needed.

Author: MartinBraquet

pandas/plotting/_matplotlib/core.py

@@ -54,7 +54,6 @@
 )
 from pandas.core.dtypes.missing import isna
 
-from pandas import Series
 import pandas.core.common as com
 from pandas.util.version import Version
 
@@ -95,6 +94,7 @@
     from pandas import (
         DataFrame,
         Index,
+        Series,
     )
 
 
@@ -1340,6 +1340,8 @@ def __init__(
 
     @register_pandas_matplotlib_converters
     def _make_plot(self, fig: Figure) -> None:
+        from pandas import Series
+
         x, y, c, data = self.x, self.y, self.c, self.data
         ax = self.axes[0]