Backport PR #46119: REF: isinstance(x, int) -> is_integer(x) (#46501)

Co-authored-by: JHM Darbyshire <24256554+attack68@users.noreply.github.com>
Co-authored-by: Simon Hawkins <simonjayhawkins@gmail.com>

pandas/io/formats/style_render.py

@@ -25,6 +25,11 @@
 from pandas._typing import Level
 from pandas.compat._optional import import_optional_dependency
 
+from pandas.core.dtypes.common import (
+    is_complex,
+    is_float,
+    is_integer,
+)
 from pandas.core.dtypes.generic import ABCSeries
 
 from pandas import (
@@ -1431,9 +1436,9 @@ def _default_formatter(x: Any, precision: int, thousands: bool = False) -> Any:
     value : Any
         Matches input type, or string if input is float or complex or int with sep.
     """
-    if isinstance(x, (float, complex)):
+    if is_float(x) or is_complex(x):
         return f"{x:,.{precision}f}" if thousands else f"{x:.{precision}f}"
-    elif isinstance(x, int):
+    elif is_integer(x):
         return f"{x:,.0f}" if thousands else f"{x:.0f}"
     return x
 
@@ -1448,7 +1453,7 @@ def _wrap_decimal_thousands(
     """
 
     def wrapper(x):
-        if isinstance(x, (float, complex, int)):
+        if is_float(x) or is_integer(x) or is_complex(x):
             if decimal != "." and thousands is not None and thousands != ",":
                 return (
                     formatter(x)