src: use dynamic version check to satisfy Mypy

src/bytecode/concrete.py

@@ -178,12 +178,16 @@ def disassemble(cls: Type[T], lineno: Optional[int], code: bytes, offset: int) -
         return cls(name, arg, lineno=lineno)
 
     def use_cache_opcodes(self) -> int:
-        return (
-            # Not supposed to be used but we need it
-            dis._inline_cache_entries[self._opcode]  # type: ignore
-            if PY313 and self._opcode in dis._inline_cache_entries
-            else (dis._inline_cache_entries[self._opcode] if PY311 else 0)
-        )
+        if sys.version_info >= (3, 13):
+            return (
+                dis._inline_cache_entries[self._opcode]
+                if self._opcode in dis._inline_cache_entries
+                else 0
+            )
+        elif sys.version_info >= (3, 11):
+            return dis._inline_cache_entries[self._opcode]  # type: ignore
+        else:
+            return 0
 
 
 class ExceptionTableEntry:
@@ -873,7 +877,7 @@ def to_code(
         )
         nlocals = len(self.varnames)
 
-        if PY311:
+        if sys.version_info >= (3, 11):
             return types.CodeType(
                 self.argcount,
                 self.posonlyargcount,

src/bytecode/instr.py

@@ -33,7 +33,10 @@
 INTRINSIC = INTRINSIC_1OP + INTRINSIC_2OP
 
 HASJABS = () if PY313 else _opcode.hasjabs
-HASJREL = _opcode.hasjump if PY313 else _opcode.hasjrel
+if sys.version_info >= (3, 13):
+    HASJREL = _opcode.hasjump
+else:
+    HASJREL = _opcode.hasjrel
 
 
 # Used for COMPARE_OP opcode argument
@@ -137,7 +140,7 @@ class Intrinsic2Op(enum.IntEnum):
 # This make type checking happy but means it won't catch attempt to manipulate an unset
 # statically. We would need guard on object attribute narrowed down through methods
 class _UNSET(int):
-    instance = None
+    instance: Optional["_UNSET"] = None
 
     def __new__(cls):
         if cls.instance is None:
@@ -259,7 +262,7 @@ def _check_arg_int(arg: Any, name: str) -> TypeGuard[int]:
     return True
 
 
-if PY312:
+if sys.version_info >= (3, 12):
 
     def opcode_has_argument(opcode: int) -> bool:
         return opcode in dis.hasarg

src/bytecode/utils.py

@@ -1,6 +1,7 @@
 import sys
+from typing import Final
 
-PY310 = sys.version_info >= (3, 10)
-PY311 = sys.version_info >= (3, 11)
-PY312 = sys.version_info >= (3, 12)
-PY313 = sys.version_info >= (3, 13)
+PY310: Final[bool] = sys.version_info >= (3, 10)
+PY311: Final[bool] = sys.version_info >= (3, 11)
+PY312: Final[bool] = sys.version_info >= (3, 12)
+PY313: Final[bool] = sys.version_info >= (3, 13)