From 378ba783a8f8dba282fa599f68b6ba212f9b5ab5 Mon Sep 17 00:00:00 2001
From: hauntsaninja <>
Date: Wed, 2 Mar 2022 14:51:04 -0800
Subject: [PATCH] Use tomllib on Python 3.11

---
 CHANGES.md         | 1 +
 setup.py           | 2 +-
 src/black/files.py | 9 ++++++---
 3 files changed, 8 insertions(+), 4 deletions(-)

diff --git a/CHANGES.md b/CHANGES.md
index 5f9341d048c..63aa1d216f1 100644
--- a/CHANGES.md
+++ b/CHANGES.md
@@ -44,6 +44,7 @@
 ### Packaging
 
 <!-- Changes to how Black is packaged, such as dependency requirements -->
+- On Python 3.11 and newer, use the standard library's `tomllib` instead of `tomli` (#2903)
 
 ### Parser
 
diff --git a/setup.py b/setup.py
index 466f1a9c3a6..6b5b957e96f 100644
--- a/setup.py
+++ b/setup.py
@@ -99,7 +99,7 @@ def find_python_files(base: Path) -> List[Path]:
     install_requires=[
         "click>=8.0.0",
         "platformdirs>=2",
-        "tomli>=1.1.0",
+        "tomli>=1.1.0; python_version < '3.11'",
         "typed-ast>=1.4.2; python_version < '3.8' and implementation_name == 'cpython'",
         "pathspec>=0.9.0",
         "dataclasses>=0.6; python_version < '3.7'",
diff --git a/src/black/files.py b/src/black/files.py
index 8348e0d8c28..418528c472c 100644
--- a/src/black/files.py
+++ b/src/black/files.py
@@ -20,7 +20,10 @@
 from mypy_extensions import mypyc_attr
 from pathspec import PathSpec
 from pathspec.patterns.gitwildmatch import GitWildMatchPatternError
-import tomli
+if sys.version_info >= (3, 11):
+    import tomllib
+else:
+    import tomli
 
 from black.output import err
 from black.report import Report
@@ -97,10 +100,10 @@ def find_pyproject_toml(path_search_start: Tuple[str, ...]) -> Optional[str]:
 def parse_pyproject_toml(path_config: str) -> Dict[str, Any]:
     """Parse a pyproject toml file, pulling out relevant parts for Black
 
-    If parsing fails, will raise a tomli.TOMLDecodeError
+    If parsing fails, will raise a tomllib.TOMLDecodeError
     """
     with open(path_config, "rb") as f:
-        pyproject_toml = tomli.load(f)
+        pyproject_toml = tomllib.load(f)
     config = pyproject_toml.get("tool", {}).get("black", {})
     return {k.replace("--", "").replace("-", "_"): v for k, v in config.items()}