TST: start testing on Python 3.11

.github/workflows/bleeding-edge.yaml

@@ -40,8 +40,7 @@ jobs:
         # the '-dev' suffix allows to use alphas and betas if no final release is available yet
         # this version should be upgraded as often as possible, typically once a year when numpy
         # and Cython are known to be compatible
-        # for next update (to '3.11-dev', 2022), see https://github.com/numpy/numpy/pull/21308
-        python-version: '3.10-dev'
+        python-version: '3.11-dev'
 
     - name: Install dependencies
       run: |

setup.cfg

@@ -43,10 +43,10 @@ install_requires =
     numpy>=1.14.5
     packaging>=20.9
     pyparsing>0.0  # hard dependency to MPL. We require it (unconstrained) in case MPL drops it in the future
-    tomli>=1.2.3
     tomli-w>=0.4.0
     tqdm>=3.4.0
     unyt>=2.8.0
+    tomli>=1.2.3;python_version < '3.11'
 python_requires = >=3.7,<3.12
 include_package_data = True
 scripts = scripts/iyt
@@ -101,9 +101,9 @@ minimal =
     matplotlib==2.2.3
     more-itertools==8.4
     numpy==1.14.5
-    tomli==1.2.3
     tomli-w==0.4.0
     unyt==2.8.0
+    tomli==1.2.3;python_version < '3.11'
 test =
     codecov~=2.0.15
     coverage~=4.5.1

yt/utilities/configure.py

@@ -1,14 +1,18 @@
 import os
+import sys
 import warnings
 from typing import Callable, List
 
-# TODO: import tomllib from the standard library instead in Python >= 3.11
-import tomli as tomllib
 import tomli_w
 from more_itertools import always_iterable
 
 from yt.utilities.configuration_tree import ConfigLeaf, ConfigNode
 
+if sys.version_info >= (3, 11):
+    import tomllib
+else:
+    import tomli as tomllib
+
 configuration_callbacks: List[Callable[["YTConfig"], None]] = []