Drop Python 3.6 support

.github/workflows/tests.yaml

@@ -32,7 +32,7 @@ jobs:
     runs-on: ${{ matrix.os }}
     strategy:
       matrix:
-        python-version: ['pypy-3.7', '3.6', '3.7', '3.8', '3.9', '3.10', '3.11-dev']
+        python-version: ['pypy-3.7', '3.7', '3.8', '3.9', '3.10', '3.11-dev']
         os: [ubuntu-latest, macos-latest, windows-latest]
     continue-on-error: ${{ matrix.python-version == '3.11-dev' }}
 
@@ -56,7 +56,7 @@ jobs:
         pytest --cov --cov-fail-under=100
 
     - name: Report coverage
-      if: matrix.os == 'ubuntu-latest' && matrix.python-version == '3.6'
+      if: matrix.os == 'ubuntu-latest' && matrix.python-version == '3.10'
       uses: codecov/codecov-action@v2
 
   allgood:

CHANGELOG.md

@@ -1,5 +1,10 @@
 # Changelog
 
+## 1.0.0 (unreleased)
+
+- Removed
+  - Support for Python 3.6
+
 ## 0.4.0
 
 - Added

pyproject.toml

@@ -10,15 +10,14 @@ authors = [
     { name = "Taneli Hukkinen", email = "hukkin@users.noreply.github.com" },
 ]
 license = { file = "LICENSE" }
-requires-python = ">=3.6"
+requires-python = ">=3.7"
 readme = "README.md"
 classifiers = [
     "License :: OSI Approved :: MIT License",
     "Operating System :: MacOS",
     "Operating System :: Microsoft :: Windows",
     "Operating System :: POSIX :: Linux",
     "Programming Language :: Python :: 3 :: Only",
-    "Programming Language :: Python :: 3.6",
     "Programming Language :: Python :: 3.7",
     "Programming Language :: Python :: 3.8",
     "Programming Language :: Python :: 3.9",
@@ -66,17 +65,17 @@ xfail_strict = true
 legacy_tox_ini = '''
 [tox]
 # Only run pytest envs when no args given to tox
-envlist = py{36,37,38,39,310}
+envlist = py{37,38,39,310}
 isolated_build = True
 
-[testenv:py{36,37,38,39,310}]
+[testenv:py{37,38,39,310}]
 description = run tests against unpackaged source
 skip_install = True
 deps = -r tests/requirements.txt
 commands =
     pytest {posargs}
 
-[testenv:py{36,37,38,39,310}-package]
+[testenv:py{37,38,39,310}-package]
 description = run tests against a built package
 deps = -r tests/requirements.txt
 commands =

tomli_w/_writer.py

@@ -1,18 +1,11 @@
+from __future__ import annotations
+
+from collections.abc import Generator, Mapping
 from datetime import date, datetime, time
 from decimal import Decimal
 import string
 from types import MappingProxyType
-from typing import (
-    Any,
-    BinaryIO,
-    Dict,
-    Generator,
-    List,
-    Mapping,
-    NamedTuple,
-    Tuple,
-    Union,
-)
+from typing import Any, BinaryIO, NamedTuple
 
 ASCII_CTRL = frozenset(chr(i) for i in range(32)) | frozenset(chr(127))
 ILLEGAL_BASIC_STR_CHARS = frozenset('"\\') | ASCII_CTRL - frozenset("\t")
@@ -33,13 +26,13 @@
 )
 
 
-def dump(obj: Dict[str, Any], fp: BinaryIO, *, multiline_strings: bool = False) -> None:
+def dump(obj: dict[str, Any], fp: BinaryIO, *, multiline_strings: bool = False) -> None:
     opts = Opts(multiline_strings)
     for chunk in gen_table_chunks(obj, opts, name=""):
         fp.write(chunk.encode())
 
 
-def dumps(obj: Dict[str, Any], *, multiline_strings: bool = False) -> str:
+def dumps(obj: dict[str, Any], *, multiline_strings: bool = False) -> str:
     opts = Opts(multiline_strings)
     return "".join(gen_table_chunks(obj, opts, name=""))
 
@@ -57,7 +50,7 @@ def gen_table_chunks(
 ) -> Generator[str, None, None]:
     yielded = False
     literals = []
-    tables: List[Tuple[str, Any, bool]] = []  # => [(key, value, inside_aot)]
+    tables: list[tuple[str, Any, bool]] = []  # => [(key, value, inside_aot)]
     for k, v in table.items():
         if isinstance(v, dict):
             tables.append((k, v, False))
@@ -127,7 +120,7 @@ def format_inline_table(obj: dict, opts: Opts) -> str:
     )
 
 
-def format_inline_array(obj: Union[tuple, list], opts: Opts, nest_level: int) -> str:
+def format_inline_array(obj: tuple | list, opts: Opts, nest_level: int) -> str:
     if not obj:
         return "[]"
     item_indent = ARRAY_INDENT * (1 + nest_level)