Drop support for Python 3.7

iiasa · Sep 19, 2023 · a2e5d55 · a2e5d55
1 parent 3bb4d03
commit a2e5d55
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Showing 5 changed files with 10 additions and 11 deletions.
diff --git a/.github/workflows/pytest.yaml b/.github/workflows/pytest.yaml
@@ -26,8 +26,7 @@ jobs:
         - ubuntu-latest
         - windows-latest
         python-version:
-        - "3.7"  # Earliest version supported by ixmp
-        - "3.8"
+        - "3.8"  # Earliest version supported by ixmp
         - "3.9"
         - "3.10"
         - "3.11"  # Latest supported by ixmp

diff --git a/RELEASE_NOTES.rst b/RELEASE_NOTES.rst
@@ -4,6 +4,7 @@ Next release
 .. All changes
 .. -----------
 
+- Support for Python 3.7 is dropped (:pull:`492`).
 - New :func:`.utils.discard_on_error` and matching argument to :meth:`.TimeSeries.transact` to avoid locking :class:`.TimeSeries` / :class:`.Scenario` on failed operations with :class:`.JDBCBackend` (:pull:`488`).
 
 .. _v3.7.0:

diff --git a/doc/install.rst b/doc/install.rst
@@ -31,6 +31,11 @@ Use cases for installing ixmp directly include:
 Install system dependencies
 ===========================
 
+Python
+------
+
+Python version 3.8 or later is required.
+
 GAMS (required)
 ---------------
 

diff --git a/ixmp/__init__.py b/ixmp/__init__.py
@@ -1,9 +1,5 @@
 import logging
-
-try:
-    from importlib.metadata import PackageNotFoundError, version
-except ImportError:  # Python 3.7
-    from importlib_metadata import PackageNotFoundError, version  # type: ignore
+from importlib.metadata import PackageNotFoundError, version
 
 from ixmp._config import config
 from ixmp.backend import BACKENDS, IAMC_IDX, ItemType

diff --git a/pyproject.toml b/pyproject.toml
@@ -20,7 +20,6 @@ classifiers = [
   "Operating System :: OS Independent",
   "Programming Language :: Python",
   "Programming Language :: Python :: 3",
-  "Programming Language :: Python :: 3.7",
   "Programming Language :: Python :: 3.8",
   "Programming Language :: Python :: 3.9",
   "Programming Language :: Python :: 3.10",
@@ -29,11 +28,10 @@ classifiers = [
   "Topic :: Scientific/Engineering",
   "Topic :: Scientific/Engineering :: Information Analysis",
 ]
+requires-python = ">=3.8"
 dependencies = [
   "click",
-  "genno <= 1.13; python_version < '3.8'",
-  "genno >= 1.16; python_version >= '3.8'",
-  "importlib_metadata; python_version < '3.8'",
+  "genno >= 1.16",
   "JPype1 >= 1.2.1",
   "openpyxl",
   "pandas >= 1.2",