deprecate py3.7 support

Author: Mr-Milk

.github/workflows/test.yml

@@ -10,7 +10,7 @@ jobs:
       fail-fast: false
       matrix:
         os: [ubuntu-latest, macos-latest, windows-latest]
-        python-version: ['3.7', '3.8', '3.9', '3.10']
+        python-version: ['3.8', '3.9', '3.10']
 
     steps:
       - uses: actions/checkout@v3

setup.cfg

@@ -20,7 +20,7 @@ classifiers =
 [options]
 packages = find:
 platforms = any
-python_requires = >= 3.7
+python_requires = >= 3.8
 install_requires =
       anndata
       numpy

spatialtis/abc.py

@@ -4,6 +4,7 @@
 from ast import literal_eval
 from collections import Counter
 from time import time
+from functools import cached_property
 from typing import Any, Dict, List, Optional, Union, Sequence
 
 import numpy as np
@@ -17,16 +18,6 @@
 from spatialtis.utils import df2adata_uns, doc, log_print, pretty_time, read_exp, read_shapes, default_args
 
 
-# cached_property is only for py3.8+
-# create a dummy one to be compatible with py3.7+
-# TODO: Remove after deprecation of py3.7
-try:
-    from functools import cached_property
-except ImportError:
-    def cached_property(obj):
-        return obj
-
-
 class NeighborsNotFoundError(Exception):
     pass