fix py37 statement

README.md

@@ -42,7 +42,7 @@ enable_isort = true
 enable_mypy = true
 mypy_preset = "strict"
 line_length = 88
-py_version = "py37"
+py_version = "py38"
 [[tool.pysen.lint.mypy_targets]]
   paths = ["."]
 ```
@@ -215,7 +215,7 @@ enable_isort = true
 enable_mypy = true
 mypy_preset = "strict"
 line_length = 88
-py_version = "py37"
+py_version = "py38"
 isort_known_third_party = ["numpy"]
 isort_known_first_party = ["pysen"]
 mypy_ignore_packages = ["pysen.generated.*"]

examples/simple_package/pyproject.toml

@@ -3,7 +3,7 @@ enable_black = true
 enable_mypy = true
 mypy_preset = "strict"
 line_length = 100
-py_version = "py37"
+py_version = "py38"
 
 [[tool.pysen.lint.mypy_targets]]
   paths = ["."]

examples/sync_cmdclass_pyproject/pyproject.toml

@@ -3,7 +3,7 @@ enable_black = true
 enable_mypy = true
 mypy_preset = "strict"
 line_length = 100
-py_version = "py37"
+py_version = "py38"
 
 [[tool.pysen.lint.mypy_targets]]
   paths = ["."]

pysen/ext/black_wrapper.py

@@ -24,7 +24,7 @@ def default(
         # NOTE(igarashi) safe to use as an argument since it is immutable
         py_version: Optional[PythonVersion] = None,
     ) -> "BlackSetting":
-        py_version = py_version or PythonVersion(3, 7)
+        py_version = py_version or PythonVersion(3, 8)
         return BlackSetting(target_version=[py_version])
 
     def export(self) -> Tuple[List[str], Dict[str, Any]]:

pysen/ext/flake8_wrapper.py

@@ -92,7 +92,7 @@ def export(self) -> Tuple[Sequence[str], Dict[str, Any]]:
 @functools.lru_cache(1)
 def _check_flake8_version() -> None:
     version = get_version("flake8")
-    minimum_supported = VersionRepresentation(3, 7)
+    minimum_supported = VersionRepresentation(3, 8)
     if version < minimum_supported:
         raise IncompatibleVersionError(
             f"pysen only supports flake8 >= {minimum_supported}, "

pysen/factory.py

@@ -67,7 +67,7 @@ def configure_lint(options: ConfigureLintOptions) -> List[ComponentBase]:
     if options.py_version is not None:
         python_version = options.py_version
     else:
-        python_version = PythonVersion(3, 7)
+        python_version = PythonVersion(3, 8)
 
     line_length = options.line_length or 88
 

tests/fakes/configs/base.toml

@@ -2,7 +2,7 @@
 base = "base2.toml"
 enable_isort = true
 line_length = 88
-py_version = "py37"
+py_version = "py38"
 isort_known_third_party = ["fuga", "piyo"]
 isort_known_first_party = ["foo"]
 

tests/fakes/configs/example.toml

@@ -10,7 +10,7 @@ enable_isort = true
 enable_mypy = true
 mypy_preset = "strict"
 line_length = 88
-py_version = "py37"
+py_version = "py38"
 isort_known_first_party = ["alpha"]
 isort_known_third_party = ["beta", "gamma"]
 mypy_ignore_packages = ["pysen.stubs", "pysen.proto"]

tests/fakes/configs/non_pysen_config.toml

@@ -1,3 +1,3 @@
 [tool.nonpysen]
 line-length = 100
-target-version = ["py37"]
+target-version = ["py38"]

tests/test_py_version.py

@@ -4,24 +4,24 @@
 
 
 def test_python_version() -> None:
-    py37 = PythonVersion(3, 7)
+    py38 = PythonVersion(3, 8)
 
-    assert py37 == PythonVersion(3, 7)
-    assert py37 != PythonVersion(3, 8)
+    assert py38 == PythonVersion(3, 8)
+    assert py38 != PythonVersion(3, 9)
 
-    assert py37.version == "3.7"
-    assert py37.full_representation == "Python3.7"
-    assert py37.short_representation == "py37"
+    assert py38.version == "3.8"
+    assert py38.full_representation == "Python3.8"
+    assert py38.short_representation == "py38"
 
-    py378 = PythonVersion(3, 7, 8)
+    py388 = PythonVersion(3, 8, 8)
 
-    assert py378 == PythonVersion(3, 7, 8)
-    assert py378 != PythonVersion(3, 7, 9)
-    assert py378 != py37
+    assert py388 == PythonVersion(3, 8, 8)
+    assert py388 != PythonVersion(3, 8, 9)
+    assert py388 != py38
 
-    assert py378.version == "3.7.8"
-    assert py378.full_representation == "Python3.7.8"
-    assert py378.short_representation == "py37"
+    assert py388.version == "3.8.8"
+    assert py388.full_representation == "Python3.8.8"
+    assert py388.short_representation == "py38"
 
 
 def test_version_ops() -> None:

tests/test_pyproject_model.py

@@ -138,15 +138,15 @@ def test__parse_source() -> None:
 
 
 def test__parse_python_version() -> None:
-    assert _parse_python_version("py37") == PythonVersion(3, 7)
+    assert _parse_python_version("py38") == PythonVersion(3, 8)
     assert _parse_python_version("PY38") == PythonVersion(3, 8)
     with pytest.raises(dacite.DaciteError) as ex:
         _parse_python_version("PY999")
 
     assert "one of" in str(ex.value)  # ensure that we suggest some options
 
     with pytest.raises(dacite.WrongTypeError):
-        _parse_python_version(37)
+        _parse_python_version(38)
 
 
 def test__parse_mypy_target() -> None:
@@ -291,7 +291,7 @@ def test_example() -> None:
     assert lint.enable_mypy
     assert lint.line_length == 88
     assert isinstance(lint.line_length, int)
-    assert lint.py_version == PythonVersion(3, 7)
+    assert lint.py_version == PythonVersion(3, 8)
     assert lint.isort_known_first_party == ["alpha"]
     assert lint.isort_known_third_party == ["beta", "gamma"]
     assert lint.isort_default_section == IsortSectionName.THIRDPARTY