drop support for python 3.7 (dbt-labs#793)

* drop support for python 3.7

* add changelog entry

* missed change

.changes/unreleased/Under the Hood-20230530-162533.yaml

@@ -0,0 +1,6 @@
+kind: Under the Hood
+body: drop support for python 3.7
+time: 2023-05-30T16:25:33.109326-05:00
+custom:
+  Author: McKnight-42
+  Issue: "792"

.github/workflows/main.yml

@@ -79,7 +79,7 @@ jobs:
     strategy:
       fail-fast: false
       matrix:
-        python-version: ["3.7", "3.8", "3.9", "3.10"]
+        python-version: ["3.8", "3.9", "3.10"]
 
     env:
       TOXENV: "unit"
@@ -177,7 +177,7 @@ 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:
       - name: Set up Python ${{ matrix.python-version }}

CONTRIBUTING.md

@@ -66,7 +66,7 @@ $EDITOR test.env
 There are a few methods for running tests locally.
 
 #### `tox`
-`tox` takes care of managing Python virtualenvs and installing dependencies in order to run tests. You can also run tests in parallel, for example you can run unit tests for Python 3.7, Python 3.8, Python 3.9, and `flake8` checks in parallel with `tox -p`. Also, you can run unit tests for specific python versions with `tox -e py37`. The configuration of these tests are located in `tox.ini`.
+`tox` takes care of managing Python virtualenvs and installing dependencies in order to run tests. You can also run tests in parallel, for example you can run unit tests for Python 3.8, Python 3.9, and `flake8` checks in parallel with `tox -p`. Also, you can run unit tests for specific python versions with `tox -e py38`. The configuration of these tests are located in `tox.ini`.
 
 #### `pytest`
 Finally, you can also run a specific test or group of tests using `pytest` directly. With a Python virtualenv active and dev dependencies installed you can do things like:

dev-requirements.txt

@@ -8,14 +8,12 @@ git+https://github.com/dbt-labs/dbt-core.git#egg=dbt-tests-adapter&subdirectory=
 black~=23.3
 bumpversion~=0.6.0
 click~=8.1
-flake8~=5.0;python_version=="3.7"
 flake8~=6.0;python_version>="3.8"
 flaky~=3.7
 freezegun~=1.2
 ipdb~=0.13.13
 mypy==1.2.0  # patch updates have historically introduced breaking changes
 pip-tools~=6.13
-pre-commit~=2.21;python_version=="3.7"
 pre-commit~=3.2;python_version>="3.8"
 pre-commit-hooks~=4.4
 pytest~=7.3
@@ -24,7 +22,6 @@ pytest-dotenv~=0.5.2
 pytest-logbook~=1.2
 pytest-xdist~=3.2
 pytz~=2023.3
-tox~=3.0;python_version=="3.7"
 tox~=4.4;python_version>="3.8"
 types-pytz~=2023.3
 types-requests~=2.28

setup.py

@@ -3,10 +3,10 @@
 import sys
 import re
 
-# require python 3.7 or newer
-if sys.version_info < (3, 7):
+# require python 3.8 or newer
+if sys.version_info < (3, 8):
     print("Error: dbt does not support this version of Python.")
-    print("Please upgrade to Python 3.7 or higher.")
+    print("Please upgrade to Python 3.8 or higher.")
     sys.exit(1)
 
 
@@ -90,10 +90,9 @@ def _get_dbt_core_version():
         "Operating System :: Microsoft :: Windows",
         "Operating System :: MacOS :: MacOS X",
         "Operating System :: POSIX :: Linux",
-        "Programming Language :: Python :: 3.7",
         "Programming Language :: Python :: 3.8",
         "Programming Language :: Python :: 3.9",
         "Programming Language :: Python :: 3.10",
     ],
-    python_requires=">=3.7",
+    python_requires=">=3.8",
 )

tox.ini

@@ -2,7 +2,7 @@
 skipsdist = True
 envlist = unit, flake8, integration-spark-thrift
 
-[testenv:{unit,py37,py38,py39,py310,py}]
+[testenv:{unit,py38,py39,py310,py}]
 allowlist_externals =
     /bin/bash
 commands = /bin/bash -c '{envpython} -m pytest -v {posargs} tests/unit'