add text parameter to config.from_file

src/flask/config.py

@@ -234,6 +234,7 @@ class Config(dict):
         filename: str,
         load: t.Callable[[t.IO[t.Any]], t.Mapping],
         silent: bool = False,
+        text: bool = True,
     ) -> bool:
         """Update the values in the config from a file that is loaded
         using the ``load`` parameter. The loaded data is passed to the
@@ -244,8 +245,8 @@ class Config(dict):
             import json
             app.config.from_file("config.json", load=json.load)
 
-            import toml
-            app.config.from_file("config.toml", load=toml.load)
+            import tomllib
+            app.config.from_file("config.toml", load=tomllib.load, text=False)
 
         :param filename: The path to the data file. This can be an
             absolute path or relative to the config root path.
@@ -254,14 +255,18 @@ class Config(dict):
         :type load: ``Callable[[Reader], Mapping]`` where ``Reader``
             implements a ``read`` method.
         :param silent: Ignore the file if it doesn't exist.
+        :param text: Open the file in text or binary mode.
         :return: ``True`` if the file was loaded successfully.
 
+        .. versionchanged:: 2.3
+            The ``text`` parameter was added.
+
         .. versionadded:: 2.0
         """
         filename = os.path.join(self.root_path, filename)
 
         try:
-            with open(filename) as f:
+            with open(filename, "r" if text else "rb") as f:
                 obj = load(f)
         except OSError as e:
             if silent and e.errno in (errno.ENOENT, errno.EISDIR):