Drop support for running with Python 3.7

Fixes #15056

.github/workflows/test.yml

@@ -26,37 +26,26 @@ jobs:
  fail-fast: false
  matrix:
  include:
- - name: Test suite with py37-windows-64
- python: '3.7'
- arch: x64
- os: windows-latest
- toxenv: py37
- - name: Test suite with py38-ubuntu
+ # Make sure to run mypyc compiled unit tests for both
+ # the oldest and newest supported Python versions
+ - name: Test suite with py38-ubuntu, mypyc-compiled
  python: '3.8'
  arch: x64
  os: ubuntu-latest
  toxenv: py
  tox_extra_args: "-n 2"
+ test_mypyc: true
+ - name: Test suite with py38-windows-64
+ python: '3.8'
+ arch: x64
+ os: windows-latest
+ toxenv: py38
  - name: Test suite with py39-ubuntu
  python: '3.9'
  arch: x64
  os: ubuntu-latest
  toxenv: py
  tox_extra_args: "-n 2"
- - name: Test suite with py37-ubuntu, mypyc-compiled
- python: '3.7'
- arch: x64
- os: ubuntu-latest
- toxenv: py
- tox_extra_args: "-n 2"
- test_mypyc: true
- - name: Test suite with py310-ubuntu, mypyc-compiled
- python: '3.10'
- arch: x64
- os: ubuntu-latest
- toxenv: py
- tox_extra_args: "-n 2"
- test_mypyc: true
  - name: Test suite with py310-ubuntu
  python: '3.10'
  arch: x64
@@ -70,29 +59,32 @@ jobs:
  toxenv: py
  tox_extra_args: "-n 2"
  test_mypyc: true
- - name: mypyc runtime tests with py37-macos
- python: '3.7'
+
+ - name: mypyc runtime tests with py38-macos
+ python: '3.8'
  arch: x64
  os: macos-latest
  toxenv: py
  tox_extra_args: "-n 2 mypyc/test/test_run.py mypyc/test/test_external.py"
- - name: mypyc runtime tests with py37-debug-build-ubuntu
- python: '3.7.13'
+ - name: mypyc runtime tests with py38-debug-build-ubuntu
+ python: '3.8'
  arch: x64
  os: ubuntu-latest
  toxenv: py
  tox_extra_args: "-n 2 mypyc/test/test_run.py mypyc/test/test_external.py"
  debug_build: true
- - name: Type check our own code (py37-ubuntu)
- python: '3.7'
+
+ - name: Type check our own code (py38-ubuntu)
+ python: '3.8'
  arch: x64
  os: ubuntu-latest
  toxenv: type
- - name: Type check our own code (py37-windows-64)
- python: '3.7'
+ - name: Type check our own code (py38-windows-64)
+ python: '3.8'
  arch: x64
  os: windows-latest
  toxenv: type
+
  # We also run these checks with pre-commit in CI,
  # but it's useful to run them with tox too,
  # to ensure the tox env works as expected

mypy/defaults.py

@@ -8,7 +8,7 @@
 # Earliest fully supported Python 3.x version. Used as the default Python
 # version in tests. Mypy wheels should be built starting with this version,
 # and CI tests should be run on this version (and later versions).
-PYTHON3_VERSION: Final = (3, 7)
+PYTHON3_VERSION: Final = (3, 8)
 
 # Earliest Python 3.x version supported via --python-version 3.x. To run
 # mypy, at least version PYTHON3_VERSION is needed.

mypy/dmypy_server.py

@@ -896,8 +896,6 @@ def cmd_inspect(
  force_reload: bool = False,
  ) -> dict[str, object]:
  """Locate and inspect expression(s)."""
- if sys.version_info < (3, 8):
- return {"error": 'Python 3.8 required for "inspect" command'}
  if not self.fine_grained_manager:
  return {
  "error": 'Command "inspect" is only valid after a "check" command'