Lib/logging: Add parameter "formatter_class" to basicConfig

Author: hartwork

Lib/logging/__init__.py

@@ -2045,6 +2045,9 @@ def basicConfig(**kwargs):
               created FileHandler, causing it to be used when the file is
               opened in text mode. If not specified, the default value is
               `backslashreplace`.
+    formatter_class
+              If specified, use the given class to instantiate the formatter.
+              If not specified, the default value is `logging.Formatter`.
 
     Note that you could specify a stream created using open(filename, mode)
     rather than passing the filename and mode in. However, it should be
@@ -2067,6 +2070,9 @@ def basicConfig(**kwargs):
 
     .. versionchanged:: 3.9
        Added the ``encoding`` and ``errors`` parameters.
+
+    .. versionchanged:: 3.14
+       Added the ``formatter_class`` parameter.
     """
     # Add thread safety in case someone mistakenly calls
     # basicConfig() from multiple threads
@@ -2107,8 +2113,9 @@ def basicConfig(**kwargs):
             if style not in _STYLES:
                 raise ValueError('Style must be one of: %s' % ','.join(
                                  _STYLES.keys()))
+            formatter_class = kwargs.pop("formatter_class", Formatter)
             fs = kwargs.pop("format", _STYLES[style][1])
-            fmt = Formatter(fs, dfs, style)
+            fmt = formatter_class(fs, dfs, style)
             for h in handlers:
                 if h.formatter is None:
                     h.setFormatter(fmt)

Misc/NEWS.d/next/Library/2025-05-07-14-36-30.gh-issue-133577.BggPk9.rst

@@ -0,0 +1 @@
+Add parameter ``formatter_class`` to ``logging.basicConfig``.