Drop support for Python 3.7 and 3.8

Author: sebastinas

.github/workflows/build.yaml

@@ -15,7 +15,6 @@ jobs:
       matrix:
         os: [ubuntu-latest, macos-latest]
         python-version:
-        - "3.8"
         - "3.9"
         - "3.10"
         - "3.11"
@@ -31,7 +30,7 @@ jobs:
     - name: Install dependencies
       run: |
         python -m pip install --upgrade pip
-        pip install setuptools wheel "blessed>=1.5" cwcwidth "backports.cached-property; python_version < '3.9'" pyte pytest
+        pip install setuptools wheel "blessed>=1.5" cwcwidth pyte pytest
     - name: Build with Python ${{ matrix.python-version }}
       run: |
         python setup.py build

.github/workflows/lint.yaml

@@ -36,6 +36,6 @@ jobs:
       run: |
         python -m pip install --upgrade pip
         pip install mypy
-        pip install "blessed>=1.5" cwcwidth "backports.cached-property; python_version < '3.9'" pyte
+        pip install "blessed>=1.5" cwcwidth pyte
     - name: Check with mypy
       run: python -m mypy

.github/workflows/publish-twine.yaml

@@ -16,7 +16,7 @@ jobs:
     - name: Install dependencies
       run: |
         python -m pip install --upgrade pip
-        pip install setuptools wheel "blessed>=1.5" cwcwidth "backports.cached-property; python_version < '3.9'"
+        pip install setuptools wheel "blessed>=1.5" cwcwidth
     - name: Build sdist
       run: |
         python setup.py sdist

curtsies/formatstring.py

@@ -21,6 +21,7 @@
 
 import re
 from cwcwidth import wcswidth, wcwidth
+from functools import cached_property
 from itertools import chain
 from typing import (
     Any,
@@ -38,11 +39,6 @@
     no_type_check,
 )
 
-try:
-    from functools import cached_property
-except ImportError:
-    from backports.cached_property import cached_property  # type: ignore
-
 from .escseqparse import parse, remove_ansi
 from .termformatconstants import (
     FG_COLORS,

setup.cfg

@@ -18,13 +18,12 @@ classifiers =
     Programming Language :: Python :: 3
 
 [options]
-python_requires = >=3.7
+python_requires = >=3.9
 zip_safe = False
 packages = curtsies
 install_requires =
     blessed>=1.5
     cwcwidth
-    backports.cached-property; python_version < "3.8"
 tests_require =
     pyte
     pytest