bpo-43731: Add an `encoding` parameter to logging.fileConfig() (GH-25273)

Doc/library/logging.config.rst

@@ -77,7 +77,7 @@ in :mod:`logging` itself) and defining handlers which are declared either in
 
    .. versionadded:: 3.2
 
-.. function:: fileConfig(fname, defaults=None, disable_existing_loggers=True)
+.. function:: fileConfig(fname, defaults=None, disable_existing_loggers=True, encoding=None)
 
    Reads the logging configuration from a :mod:`configparser`\-format file. The
    format of the file should be as described in
@@ -111,6 +111,8 @@ in :mod:`logging` itself) and defining handlers which are declared either in
                                     they or their ancestors are explicitly named
                                     in the logging configuration.
 
+    :param encoding: The encoding used to open file when *fname* is filename.
+
    .. versionchanged:: 3.4
       An instance of a subclass of :class:`~configparser.RawConfigParser` is
       now accepted as a value for ``fname``. This facilitates:
@@ -121,6 +123,9 @@ in :mod:`logging` itself) and defining handlers which are declared either in
         application (e.g. based on command-line parameters or other aspects
         of the runtime environment) before being passed to ``fileConfig``.
 
+    .. versionadded:: 3.10
+       The *encoding* parameter is added.
+
 .. function:: listen(port=DEFAULT_LOGGING_CONFIG_PORT, verify=None)
 
    Starts up a socket server on the specified port, and listens for new

Lib/logging/config.py

@@ -48,7 +48,7 @@ RESET_ERROR = errno.ECONNRESET
 #   _listener holds the server object doing the listening
 _listener = None
 
-def fileConfig(fname, defaults=None, disable_existing_loggers=True):
+def fileConfig(fname, defaults=None, disable_existing_loggers=True, encoding=None):
     """
     Read the logging configuration from a ConfigParser-format file.
 
@@ -66,7 +66,8 @@ def fileConfig(fname, defaults=None, disable_existing_loggers=True):
         if hasattr(fname, 'readline'):
             cp.read_file(fname)
         else:
-            cp.read(fname)
+            encoding = io.text_encoding(encoding)
+            cp.read(fname, encoding=encoding)
 
     formatters = _create_formatters(cp)
 

Misc/NEWS.d/next/Library/2021-04-08-15-19-20.bpo-43731.nnVd3h.rst

@@ -0,0 +1 @@
+Add an ``encoding`` parameter :func:`logging.fileConfig()`.