Small bit of linting

uncompyle6/scanner.py

@@ -1,4 +1,4 @@
-#  Copyright (c) 2016, 2018-2022 by Rocky Bernstein
+#  Copyright (c) 2016, 2018-2023 by Rocky Bernstein
 #  Copyright (c) 2005 by Dan Pascu <dan@windowmaker.org>
 #  Copyright (c) 2000-2002 by hartmut Goebel <h.goebel@crazy-compilers.com>
 #  Copyright (c) 1999 John Aycock
@@ -21,7 +21,8 @@ scanner/ingestion module. From here we call various version-specific
 scanners, e.g. for Python 2.7 or 3.4.
 """
 
-from typing import Optional, Tuple
+from types import ModuleType
+from typing import Optional, Tuple, Union
 from array import array
 from collections import namedtuple
 
@@ -101,12 +102,15 @@ class Code(object):
         self._tokens, self._customize = scanner.ingest(co, classname, show_asm=show_asm)
 
 
-class Scanner(object):
+class Scanner:
     def __init__(self, version: tuple, show_asm=None, is_pypy=False):
         self.version = version
         self.show_asm = show_asm
         self.is_pypy = is_pypy
 
+        # Temoorary initialization.
+        self.opc = ModuleType("uninitialized")
+
         if version[:2] in PYTHON_VERSIONS:
             v_str = f"""opcode_{version_tuple_to_str(version, start=0, end=2, delimiter="")}"""
             if is_pypy:
@@ -319,15 +323,6 @@ class Scanner(object):
     def next_offset(self, op, offset: int) -> int:
         return xdis.next_offset(op, self.opc, offset)
 
-    def print_bytecode(self):
-        for i in self.op_range(0, len(self.code)):
-            op = self.code[i]
-            if op in self.JUMP_OPS:
-                dest = self.get_target(i, op)
-                print("%i\t%s\t%i" % (i, self.opname[op], dest))
-            else:
-                print("%i\t%s\t" % (i, self.opname[op]))
-
     def first_instr(self, start: int, end: int, instr, target=None, exact=True):
         """
         Find the first <instr> in the block from start to end.
@@ -483,7 +478,6 @@ class Scanner(object):
         result = []
         extended_arg = 0
         for offset in self.op_range(start, end):
-
             op = code[offset]
 
             if op == self.opc.EXTENDED_ARG:
@@ -542,7 +536,6 @@ class Scanner(object):
                 offset = inst.offset
                 continue
             if last_was_extarg:
-
                 # j = self.stmts.index(inst.offset)
                 # self.lines[j] = offset
 
@@ -595,7 +588,7 @@ class Scanner(object):
             target = parent["end"]
         return target
 
-    def setTokenClass(self, tokenClass) -> Token:
+    def setTokenClass(self, tokenClass: Token) -> Token:
         self.Token = tokenClass
         return self.Token
 
@@ -621,7 +614,7 @@ def parse_fn_counts_30_35(argc: int) -> Tuple[int, int, int]:
     return ((argc & 0xFF), (argc >> 8) & 0xFF, annotate_count)
 
 
-def get_scanner(version, is_pypy=False, show_asm=None):
+def get_scanner(version: Union[str, tuple], is_pypy=False, show_asm=None) -> Scanner:
 
     # If version is a string, turn that into the corresponding float.
     if isinstance(version, str):

uncompyle6/scanners/scanner15.py

@@ -1,4 +1,4 @@
-#  Copyright (c) 2016-2018, 2021-2022 by Rocky Bernstein
+#  Copyright (c) 2016-2018, 2021-2023 by Rocky Bernstein
 """
 Python 1.5 bytecode decompiler massaging.
 
@@ -7,12 +7,15 @@ grammar parsing.
 """
 
 import uncompyle6.scanners.scanner21 as scan
+
 # from uncompyle6.scanners.scanner26 import ingest as  ingest26
 
 # bytecode verification, verify(), uses JUMP_OPs from here
 from xdis.opcodes import opcode_15
+
 JUMP_OPS = opcode_15.JUMP_OPS
 
+
 # We base this off of 2.2 instead of the other way around
 # because we cleaned things up this way.
 # The history is that 2.7 support is the cleanest,
@@ -23,7 +26,7 @@ class Scanner15(scan.Scanner21):
         self.opc = opcode_15
         self.opname = opcode_15.opname
         self.version = (1, 5)
-        self.genexpr_name = '<generator expression>'
+        self.genexpr_name = "<generator expression>"
         return
 
     def ingest(self, co, classname=None, code_objects={}, show_asm=None):
@@ -36,18 +39,22 @@ class Scanner15(scan.Scanner21):
         Some transformations are made to assist the deparsing grammar:
            -  various types of LOAD_CONST's are categorized in terms of what they load
            -  COME_FROM instructions are added to assist parsing control structures
-           -  operands with stack argument counts or flag masks are appended to the opcode name, e.g.:
+           -  operands with stack argument counts or flag masks are appended to the
+              opcode name, e.g.:
               *  BUILD_LIST, BUILD_SET
-              *  MAKE_FUNCTION and FUNCTION_CALLS append the number of positional arguments
+              *  MAKE_FUNCTION and FUNCTION_CALLS append the number of positional
+                 arguments
            -  EXTENDED_ARGS instructions are removed
 
-        Also, when we encounter certain tokens, we add them to a set which will cause custom
+        Also, when we encounter certain tokens, we add them to a set which will cause
-        grammar rules. Specifically, variable arg tokens like MAKE_FUNCTION or BUILD_LIST
+        custom grammar rules. Specifically, variable arg tokens like MAKE_FUNCTION or
-        cause specific rules for the specific number of arguments they take.
+        BUILD_LIST cause specific rules for the specific number of arguments they take.
         """
-        tokens, customize = scan.Scanner21.ingest(self, co, classname, code_objects, show_asm)
+        tokens, customize = scan.Scanner21.ingest(
+            self, co, classname, code_objects, show_asm
+        )
         for t in tokens:
             if t.op == self.opc.UNPACK_LIST:
-                t.kind = 'UNPACK_LIST_%d' % t.attr
+                t.kind = "UNPACK_LIST_%d" % t.attr
             pass
         return tokens, customize

uncompyle6/scanners/scanner37base.py

@@ -188,8 +188,7 @@ class Scanner37Base(Scanner):
         return
 
     def ingest(self, co, classname=None, code_objects={}, show_asm=None):
-        """
+        """Create "tokens" the bytecode of an Python code object. Largely these
-        Create "tokens" the bytecode of an Python code object. Largely these
         are the opcode name, but in some cases that has been modified to make parsing
         easier.
         returning a list of uncompyle6 Token's.
@@ -197,14 +196,18 @@ class Scanner37Base(Scanner):
         Some transformations are made to assist the deparsing grammar:
            -  various types of LOAD_CONST's are categorized in terms of what they load
            -  COME_FROM instructions are added to assist parsing control structures
-           -  operands with stack argument counts or flag masks are appended to the opcode name, e.g.:
+           -  operands with stack argument counts or flag masks are appended to the
-              *  BUILD_LIST, BUILD_SET
+              opcode name, e.g.:
-              *  MAKE_FUNCTION and FUNCTION_CALLS append the number of positional arguments
+                *  BUILD_LIST, BUILD_SET
+                *  MAKE_FUNCTION and FUNCTION_CALLS append the number of positional
+                   arguments
            -  EXTENDED_ARGS instructions are removed
 
-        Also, when we encounter certain tokens, we add them to a set which will cause custom
+        Also, when we encounter certain tokens, we add them to a set
-        grammar rules. Specifically, variable arg tokens like MAKE_FUNCTION or BUILD_LIST
+        which will cause custom grammar rules. Specifically, variable
-        cause specific rules for the specific number of arguments they take.
+        arg tokens like MAKE_FUNCTION or BUILD_LIST cause specific
+        rules for the specific number of arguments they take.
+
         """
 
         def tokens_append(j, token):