remove support for python 3.8

Author: asottile

.github/workflows/main.yml

@@ -10,10 +10,10 @@ jobs:
   main-windows:
     uses: asottile/workflows/.github/workflows/[email protected]
     with:
-      env: '["py38"]'
+      env: '["py39"]'
       os: windows-latest
   main-linux:
     uses: asottile/workflows/.github/workflows/[email protected]
     with:
-      env: '["py38", "py39", "py310", "py311", "py312"]'
+      env: '["py39", "py310", "py311", "py312"]'
       os: ubuntu-latest

pyupgrade/_main.py

@@ -64,10 +64,7 @@ def _fix_plugins(contents_text: str, settings: Settings) -> str:
     if not callbacks:
         return contents_text
 
-    try:
-        tokens = src_to_tokens(contents_text)
-    except tokenize.TokenError:  # pragma: no cover (bpo-2180)
-        return contents_text
+    tokens = src_to_tokens(contents_text)
 
     _fixup_dedent_tokens(tokens)
 

pyupgrade/_plugins/typing_classes.py

@@ -2,7 +2,6 @@
 
 import ast
 import functools
-import sys
 from typing import Iterable
 
 from tokenize_rt import Offset
@@ -24,19 +23,13 @@ def _unparse(node: ast.expr) -> str:
     elif isinstance(node, ast.Attribute):
         return ''.join((_unparse(node.value), '.', node.attr))
     elif isinstance(node, ast.Subscript):
-        if sys.version_info >= (3, 9):  # pragma: >=3.9 cover
-            node_slice: ast.expr = node.slice
-        elif isinstance(node.slice, ast.Index):  # pragma: <3.9 cover
-            node_slice = node.slice.value
-        else:
-            raise AssertionError(f'expected Slice: {ast.dump(node)}')
-        if isinstance(node_slice, ast.Tuple):
-            if len(node_slice.elts) == 1:
-                slice_s = f'{_unparse(node_slice.elts[0])},'
+        if isinstance(node.slice, ast.Tuple):
+            if len(node.slice.elts) == 1:
+                slice_s = f'{_unparse(node.slice.elts[0])},'
             else:
-                slice_s = ', '.join(_unparse(elt) for elt in node_slice.elts)
+                slice_s = ', '.join(_unparse(elt) for elt in node.slice.elts)
         else:
-            slice_s = _unparse(node_slice)
+            slice_s = _unparse(node.slice)
         return f'{_unparse(node.value)}[{slice_s}]'
     elif (
             isinstance(node, ast.Constant) and

pyupgrade/_plugins/typing_pep563.py

@@ -90,15 +90,8 @@ def _process_call(node: ast.Call) -> Iterable[ast.AST]:
 def _process_subscript(node: ast.Subscript) -> Iterable[ast.AST]:
     name = _get_name(node.value)
     if name == 'Annotated':
-        if sys.version_info >= (3, 9):  # pragma: >=3.9 cover
-            node_slice = node.slice
-        elif isinstance(node.slice, ast.Index):  # pragma: <3.9 cover
-            node_slice: ast.AST = node.slice.value
-        else:  # pragma: <3.9 cover
-            node_slice = node.slice
-
-        if isinstance(node_slice, ast.Tuple) and node_slice.elts:
-            yield node_slice.elts[0]
+        if isinstance(node.slice, ast.Tuple) and node.slice.elts:
+            yield node.slice.elts[0]
     elif name != 'Literal':
         yield node.slice
 

pyupgrade/_plugins/typing_pep604.py

@@ -153,14 +153,7 @@ def visit_Subscript(
 
     # don't rewrite forward annotations (unless we know they will be dequoted)
     if 'annotations' not in state.from_imports['__future__']:
-        if (
-                (sys.version_info >= (3, 9) and _any_arg_is_str(node.slice)) or
-                (
-                    sys.version_info < (3, 9) and
-                    isinstance(node.slice, ast.Index) and
-                    _any_arg_is_str(node.slice.value)
-                )
-        ):
+        if _any_arg_is_str(node.slice):
             return
 
     if is_name_attr(
@@ -171,19 +164,12 @@ def visit_Subscript(
     ):
         yield ast_to_offset(node), _fix_optional
     elif is_name_attr(node.value, state.from_imports, ('typing',), ('Union',)):
-        if sys.version_info >= (3, 9):  # pragma: >=3.9 cover
-            node_slice = node.slice
-        elif isinstance(node.slice, ast.Index):  # pragma: <3.9 cover
-            node_slice: ast.AST = node.slice.value
-        else:  # pragma: <3.9 cover
-            node_slice = node.slice  # unexpected slice type
-
-        if isinstance(node_slice, ast.Slice):  # not a valid annotation
+        if isinstance(node.slice, ast.Slice):  # not a valid annotation
             return
 
-        if isinstance(node_slice, ast.Tuple):
-            if node_slice.elts:
-                arg_count = len(node_slice.elts)
+        if isinstance(node.slice, ast.Tuple):
+            if node.slice.elts:
+                arg_count = len(node.slice.elts)
             else:
                 return  # empty Union
         else:

pyupgrade/_plugins/typing_pep646_unpack.py

@@ -35,7 +35,7 @@ def visit_Subscript(
         return
 
     if is_name_attr(node.value, state.from_imports, ('typing',), ('Unpack',)):
-        if isinstance(parent, (ast.Subscript, ast.Index)):
+        if isinstance(parent, ast.Subscript):
             yield ast_to_offset(node.value), _replace_unpack_with_star
 
 

setup.cfg

@@ -20,7 +20,7 @@ classifiers =
 packages = find:
 install_requires =
     tokenize-rt>=5.2.0
-python_requires = >=3.8.1
+python_requires = >=3.9
 
 [options.packages.find]
 exclude =