FM / python3.10

/usr/lib/python3.10

Name	Size	Mode	Actions
asyncio/	-	0755	rm
collections/	-	0755	rm
concurrent/	-	0755	rm
config-3.10-x86_64-linux-gnu/	-	0755	rm
ctypes/	-	0755	rm
curses/	-	0755	rm
dbm/	-	0755	rm
distutils/	-	0755	rm
email/	-	0755	rm
encodings/	-	0755	rm
html/	-	0755	rm
http/	-	0755	rm
importlib/	-	0755	rm
json/	-	0755	rm
lib-dynload/	-	0755	rm
lib2to3/	-	0755	rm
logging/	-	0755	rm
multiprocessing/	-	0755	rm
pydoc_data/	-	0755	rm
sqlite3/	-	0755	rm
test/	-	0755	rm
unittest/	-	0755	rm
urllib/	-	0755	rm
venv/	-	0755	rm
wsgiref/	-	0755	rm
xml/	-	0755	rm
xmlrpc/	-	0755	rm
zoneinfo/	-	0755	rm
__pycache__/	-	0755	rm
abc.py	6522	0644	edit dl rm
aifc.py	32605	0644	edit dl rm
antigravity.py	500	0644	edit dl rm
argparse.py	98839	0644	edit dl rm
ast.py	59900	0644	edit dl rm
asynchat.py	11520	0644	edit dl rm
asyncore.py	20268	0644	edit dl rm
base64.py	20846	0755	edit dl rm
bdb.py	32396	0644	edit dl rm
binhex.py	14784	0644	edit dl rm
bisect.py	3135	0644	edit dl rm
bz2.py	11847	0644	edit dl rm
calendar.py	24575	0644	edit dl rm
cgi.py	34099	0755	edit dl rm
cgitb.py	12096	0644	edit dl rm
chunk.py	5435	0644	edit dl rm
cmd.py	14860	0644	edit dl rm
code.py	10622	0644	edit dl rm
codecs.py	36714	0644	edit dl rm
codeop.py	5609	0644	edit dl rm
colorsys.py	4017	0644	edit dl rm
compileall.py	20252	0644	edit dl rm
configparser.py	54612	0644	edit dl rm
contextlib.py	25882	0644	edit dl rm
contextvars.py	129	0644	edit dl rm
copy.py	8681	0644	edit dl rm
copyreg.py	7426	0644	edit dl rm
cProfile.py	6347	0755	edit dl rm
crypt.py	3848	0644	edit dl rm
csv.py	16030	0644	edit dl rm
dataclasses.py	56390	0644	edit dl rm
datetime.py	88086	0644	edit dl rm
decimal.py	320	0644	edit dl rm
difflib.py	83308	0644	edit dl rm
dis.py	20020	0644	edit dl rm
doctest.py	105143	0644	edit dl rm
enum.py	39831	0644	edit dl rm
filecmp.py	10178	0644	edit dl rm
fileinput.py	16442	0644	edit dl rm
fnmatch.py	6713	0644	edit dl rm
fractions.py	28242	0644	edit dl rm
ftplib.py	36001	0644	edit dl rm
functools.py	38076	0644	edit dl rm
genericpath.py	4975	0644	edit dl rm
getopt.py	7489	0644	edit dl rm
getpass.py	5990	0644	edit dl rm
gettext.py	27693	0644	edit dl rm
glob.py	7888	0644	edit dl rm
graphlib.py	9573	0644	edit dl rm
gzip.py	21849	0644	edit dl rm
hashlib.py	10229	0644	edit dl rm
heapq.py	22877	0644	edit dl rm
hmac.py	7717	0644	edit dl rm
imaplib.py	54866	0644	edit dl rm
imghdr.py	3808	0644	edit dl rm
imp.py	10591	0644	edit dl rm
inspect.py	124378	0644	edit dl rm
io.py	4196	0644	edit dl rm
ipaddress.py	77780	0644	edit dl rm
keyword.py	1061	0644	edit dl rm
LICENSE.txt	13936	0644	edit dl rm
linecache.py	5690	0644	edit dl rm
locale.py	78128	0644	edit dl rm
lzma.py	13277	0644	edit dl rm
mailbox.py	78794	0644	edit dl rm
mailcap.py	9116	0644	edit dl rm
mimetypes.py	22539	0644	edit dl rm
modulefinder.py	24401	0644	edit dl rm
netrc.py	5747	0644	edit dl rm
nntplib.py	41023	0644	edit dl rm
ntpath.py	27561	0644	edit dl rm
nturl2path.py	2887	0644	edit dl rm
numbers.py	10348	0644	edit dl rm
opcode.py	5902	0644	edit dl rm
operator.py	10751	0644	edit dl rm
optparse.py	60369	0644	edit dl rm
os.py	39557	0644	edit dl rm
pathlib.py	49575	0644	edit dl rm
pdb.py	63225	0755	edit dl rm
pickle.py	64949	0644	edit dl rm
pickletools.py	93486	0644	edit dl rm
pipes.py	8914	0644	edit dl rm
pkgutil.py	24576	0644	edit dl rm
platform.py	42022	0755	edit dl rm
plistlib.py	28592	0644	edit dl rm
poplib.py	15198	0644	edit dl rm
posixpath.py	16123	0644	edit dl rm
pprint.py	24444	0644	edit dl rm
profile.py	22883	0755	edit dl rm
pstats.py	29326	0644	edit dl rm
pty.py	5213	0644	edit dl rm
pyclbr.py	11396	0644	edit dl rm
pydoc.py	109884	0755	edit dl rm
py_compile.py	7878	0644	edit dl rm
queue.py	11496	0644	edit dl rm
quopri.py	7267	0755	edit dl rm
random.py	33221	0644	edit dl rm
re.py	15860	0644	edit dl rm
reprlib.py	5267	0644	edit dl rm
rlcompleter.py	7817	0644	edit dl rm
runpy.py	13111	0644	edit dl rm
sched.py	6351	0644	edit dl rm
secrets.py	2036	0644	edit dl rm
selectors.py	19536	0644	edit dl rm
shelve.py	8560	0644	edit dl rm
shlex.py	13501	0644	edit dl rm
shutil.py	54572	0644	edit dl rm
signal.py	2438	0644	edit dl rm
site.py	23667	0644	edit dl rm
sitecustomize.py	155	0644	edit dl rm
smtpd.py	35165	0755	edit dl rm
smtplib.py	45418	0755	edit dl rm
sndhdr.py	7099	0644	edit dl rm
socket.py	36785	0644	edit dl rm
socketserver.py	27296	0644	edit dl rm
sre_compile.py	27973	0644	edit dl rm
sre_constants.py	7177	0644	edit dl rm
sre_parse.py	40779	0644	edit dl rm
ssl.py	53725	0644	edit dl rm
stat.py	5485	0644	edit dl rm
statistics.py	43205	0644	edit dl rm
string.py	10566	0644	edit dl rm
stringprep.py	12917	0644	edit dl rm
struct.py	257	0644	edit dl rm
subprocess.py	84917	0644	edit dl rm
sunau.py	18158	0644	edit dl rm
symtable.py	10217	0644	edit dl rm
sysconfig.py	29398	0644	edit dl rm
tabnanny.py	11299	0755	edit dl rm
tarfile.py	108332	0755	edit dl rm
telnetlib.py	23254	0644	edit dl rm
tempfile.py	34567	0644	edit dl rm
textwrap.py	19772	0644	edit dl rm
this.py	1003	0644	edit dl rm
threading.py	57200	0644	edit dl rm
timeit.py	13495	0755	edit dl rm
token.py	2386	0644	edit dl rm
tokenize.py	25921	0644	edit dl rm
trace.py	29215	0755	edit dl rm
traceback.py	26222	0644	edit dl rm
tracemalloc.py	18047	0644	edit dl rm
tty.py	879	0644	edit dl rm
turtle.py	143760	0644	edit dl rm
types.py	10117	0644	edit dl rm
typing.py	92557	0644	edit dl rm
uu.py	7300	0755	edit dl rm
uuid.py	27500	0644	edit dl rm
warnings.py	19688	0644	edit dl rm
wave.py	18004	0644	edit dl rm
weakref.py	21560	0644	edit dl rm
webbrowser.py	24739	0755	edit dl rm
xdrlib.py	5913	0644	edit dl rm
zipapp.py	7535	0644	edit dl rm
zipfile.py	90851	0644	edit dl rm
zipimport.py	30891	0644	edit dl rm
_aix_support.py	3270	0644	edit dl rm
_bootsubprocess.py	2675	0644	edit dl rm
_collections_abc.py	32284	0644	edit dl rm
_compat_pickle.py	8749	0644	edit dl rm
_compression.py	5681	0644	edit dl rm
_distutils_system_mod.py	6312	0644	edit dl rm
_markupbase.py	14653	0644	edit dl rm
_osx_support.py	21787	0644	edit dl rm
_pydecimal.py	228676	0644	edit dl rm
_pyio.py	94467	0644	edit dl rm
_py_abc.py	6189	0644	edit dl rm
_sitebuiltins.py	3128	0644	edit dl rm
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_sysconfigdata__linux_x86_64-linux-gnu.py	27484	0644	edit dl rm
_sysconfigdata__x86_64-linux-gnu.py	27484	0644	edit dl rm
_threading_local.py	7220	0644	edit dl rm
_weakrefset.py	5923	0644	edit dl rm
__future__.py	5155	0644	edit dl rm
__phello__.foo.py	64	0644	edit dl rm

Edit: /usr/lib/python3.10/dis.py (20020B)

"""Disassembler of Python byte code into mnemonics."""

import sys
import types
import collections
import io

from opcode import *
from opcode import __all__ as _opcodes_all

__all__ = ["code_info", "dis", "disassemble", "distb", "disco",
           "findlinestarts", "findlabels", "show_code",
           "get_instructions", "Instruction", "Bytecode"] + _opcodes_all
del _opcodes_all

_have_code = (types.MethodType, types.FunctionType, types.CodeType,
              classmethod, staticmethod, type)

FORMAT_VALUE = opmap['FORMAT_VALUE']
FORMAT_VALUE_CONVERTERS = (
    (None, ''),
    (str, 'str'),
    (repr, 'repr'),
    (ascii, 'ascii'),
)
MAKE_FUNCTION = opmap['MAKE_FUNCTION']
MAKE_FUNCTION_FLAGS = ('defaults', 'kwdefaults', 'annotations', 'closure')

def _try_compile(source, name):
    """Attempts to compile the given source, first as an expression and
       then as a statement if the first approach fails.

Utility function to accept strings in functions that otherwise
       expect code objects
    """
    try:
        c = compile(source, name, 'eval')
    except SyntaxError:
        c = compile(source, name, 'exec')
    return c

def dis(x=None, *, file=None, depth=None):
    """Disassemble classes, methods, functions, and other compiled objects.

With no argument, disassemble the last traceback.

Compiled objects currently include generator objects, async generator
    objects, and coroutine objects, all of which store their code object
    in a special attribute.
    """
    if x is None:
        distb(file=file)
        return
    # Extract functions from methods.
    if hasattr(x, '__func__'):
        x = x.__func__
    # Extract compiled code objects from...
    if hasattr(x, '__code__'):  # ...a function, or
        x = x.__code__
    elif hasattr(x, 'gi_code'):  #...a generator object, or
        x = x.gi_code
    elif hasattr(x, 'ag_code'):  #...an asynchronous generator object, or
        x = x.ag_code
    elif hasattr(x, 'cr_code'):  #...a coroutine.
        x = x.cr_code
    # Perform the disassembly.
    if hasattr(x, '__dict__'):  # Class or module
        items = sorted(x.__dict__.items())
        for name, x1 in items:
            if isinstance(x1, _have_code):
                print("Disassembly of %s:" % name, file=file)
                try:
                    dis(x1, file=file, depth=depth)
                except TypeError as msg:
                    print("Sorry:", msg, file=file)
                print(file=file)
    elif hasattr(x, 'co_code'): # Code object
        _disassemble_recursive(x, file=file, depth=depth)
    elif isinstance(x, (bytes, bytearray)): # Raw bytecode
        _disassemble_bytes(x, file=file)
    elif isinstance(x, str):    # Source code
        _disassemble_str(x, file=file, depth=depth)
    else:
        raise TypeError("don't know how to disassemble %s objects" %
                        type(x).__name__)

def distb(tb=None, *, file=None):
    """Disassemble a traceback (default: last traceback)."""
    if tb is None:
        try:
            tb = sys.last_traceback
        except AttributeError:
            raise RuntimeError("no last traceback to disassemble") from None
        while tb.tb_next: tb = tb.tb_next
    disassemble(tb.tb_frame.f_code, tb.tb_lasti, file=file)

# The inspect module interrogates this dictionary to build its
# list of CO_* constants. It is also used by pretty_flags to
# turn the co_flags field into a human readable list.
COMPILER_FLAG_NAMES = {
     1: "OPTIMIZED",
     2: "NEWLOCALS",
     4: "VARARGS",
     8: "VARKEYWORDS",
    16: "NESTED",
    32: "GENERATOR",
    64: "NOFREE",
   128: "COROUTINE",
   256: "ITERABLE_COROUTINE",
   512: "ASYNC_GENERATOR",
}

def pretty_flags(flags):
    """Return pretty representation of code flags."""
    names = []
    for i in range(32):
        flag = 1<<i
        if flags & flag:
            names.append(COMPILER_FLAG_NAMES.get(flag, hex(flag)))
            flags ^= flag
            if not flags:
                break
    else:
        names.append(hex(flags))
    return ", ".join(names)

def _get_code_object(x):
    """Helper to handle methods, compiled or raw code objects, and strings."""
    # Extract functions from methods.
    if hasattr(x, '__func__'):
        x = x.__func__
    # Extract compiled code objects from...
    if hasattr(x, '__code__'):  # ...a function, or
        x = x.__code__
    elif hasattr(x, 'gi_code'):  #...a generator object, or
        x = x.gi_code
    elif hasattr(x, 'ag_code'):  #...an asynchronous generator object, or
        x = x.ag_code
    elif hasattr(x, 'cr_code'):  #...a coroutine.
        x = x.cr_code
    # Handle source code.
    if isinstance(x, str):
        x = _try_compile(x, "<disassembly>")
    # By now, if we don't have a code object, we can't disassemble x.
    if hasattr(x, 'co_code'):
        return x
    raise TypeError("don't know how to disassemble %s objects" %
                    type(x).__name__)

def code_info(x):
    """Formatted details of methods, functions, or code."""
    return _format_code_info(_get_code_object(x))

def _format_code_info(co):
    lines = []
    lines.append("Name:              %s" % co.co_name)
    lines.append("Filename:          %s" % co.co_filename)
    lines.append("Argument count:    %s" % co.co_argcount)
    lines.append("Positional-only arguments: %s" % co.co_posonlyargcount)
    lines.append("Kw-only arguments: %s" % co.co_kwonlyargcount)
    lines.append("Number of locals:  %s" % co.co_nlocals)
    lines.append("Stack size:        %s" % co.co_stacksize)
    lines.append("Flags:             %s" % pretty_flags(co.co_flags))
    if co.co_consts:
        lines.append("Constants:")
        for i_c in enumerate(co.co_consts):
            lines.append("%4d: %r" % i_c)
    if co.co_names:
        lines.append("Names:")
        for i_n in enumerate(co.co_names):
            lines.append("%4d: %s" % i_n)
    if co.co_varnames:
        lines.append("Variable names:")
        for i_n in enumerate(co.co_varnames):
            lines.append("%4d: %s" % i_n)
    if co.co_freevars:
        lines.append("Free variables:")
        for i_n in enumerate(co.co_freevars):
            lines.append("%4d: %s" % i_n)
    if co.co_cellvars:
        lines.append("Cell variables:")
        for i_n in enumerate(co.co_cellvars):
            lines.append("%4d: %s" % i_n)
    return "\n".join(lines)

def show_code(co, *, file=None):
    """Print details of methods, functions, or code to *file*.

If *file* is not provided, the output is printed on stdout.
    """
    print(code_info(co), file=file)

_Instruction = collections.namedtuple("_Instruction",
     "opname opcode arg argval argrepr offset starts_line is_jump_target")

_Instruction.opname.__doc__ = "Human readable name for operation"
_Instruction.opcode.__doc__ = "Numeric code for operation"
_Instruction.arg.__doc__ = "Numeric argument to operation (if any), otherwise None"
_Instruction.argval.__doc__ = "Resolved arg value (if known), otherwise same as arg"
_Instruction.argrepr.__doc__ = "Human readable description of operation argument"
_Instruction.offset.__doc__ = "Start index of operation within bytecode sequence"
_Instruction.starts_line.__doc__ = "Line started by this opcode (if any), otherwise None"
_Instruction.is_jump_target.__doc__ = "True if other code jumps to here, otherwise False"

_OPNAME_WIDTH = 20
_OPARG_WIDTH = 5

class Instruction(_Instruction):
    """Details for a bytecode operation

Defined fields:
         opname - human readable name for operation
         opcode - numeric code for operation
         arg - numeric argument to operation (if any), otherwise None
         argval - resolved arg value (if known), otherwise same as arg
         argrepr - human readable description of operation argument
         offset - start index of operation within bytecode sequence
         starts_line - line started by this opcode (if any), otherwise None
         is_jump_target - True if other code jumps to here, otherwise False
    """

def _disassemble(self, lineno_width=3, mark_as_current=False, offset_width=4):
        """Format instruction details for inclusion in disassembly output

*lineno_width* sets the width of the line number field (0 omits it)
        *mark_as_current* inserts a '-->' marker arrow as part of the line
        *offset_width* sets the width of the instruction offset field
        """
        fields = []
        # Column: Source code line number
        if lineno_width:
            if self.starts_line is not None:
                lineno_fmt = "%%%dd" % lineno_width
                fields.append(lineno_fmt % self.starts_line)
            else:
                fields.append(' ' * lineno_width)
        # Column: Current instruction indicator
        if mark_as_current:
            fields.append('-->')
        else:
            fields.append('   ')
        # Column: Jump target marker
        if self.is_jump_target:
            fields.append('>>')
        else:
            fields.append('  ')
        # Column: Instruction offset from start of code sequence
        fields.append(repr(self.offset).rjust(offset_width))
        # Column: Opcode name
        fields.append(self.opname.ljust(_OPNAME_WIDTH))
        # Column: Opcode argument
        if self.arg is not None:
            fields.append(repr(self.arg).rjust(_OPARG_WIDTH))
            # Column: Opcode argument details
            if self.argrepr:
                fields.append('(' + self.argrepr + ')')
        return ' '.join(fields).rstrip()

def get_instructions(x, *, first_line=None):
    """Iterator for the opcodes in methods, functions or code

Generates a series of Instruction named tuples giving the details of
    each operations in the supplied code.

If *first_line* is not None, it indicates the line number that should
    be reported for the first source line in the disassembled code.
    Otherwise, the source line information (if any) is taken directly from
    the disassembled code object.
    """
    co = _get_code_object(x)
    cell_names = co.co_cellvars + co.co_freevars
    linestarts = dict(findlinestarts(co))
    if first_line is not None:
        line_offset = first_line - co.co_firstlineno
    else:
        line_offset = 0
    return _get_instructions_bytes(co.co_code, co.co_varnames, co.co_names,
                                   co.co_consts, cell_names, linestarts,
                                   line_offset)

def _get_const_info(const_index, const_list):
    """Helper to get optional details about const references

Returns the dereferenced constant and its repr if the constant
       list is defined.
       Otherwise returns the constant index and its repr().
    """
    argval = const_index
    if const_list is not None:
        argval = const_list[const_index]
    return argval, repr(argval)

def _get_name_info(name_index, name_list):
    """Helper to get optional details about named references

Returns the dereferenced name as both value and repr if the name
       list is defined.
       Otherwise returns the name index and its repr().
    """
    argval = name_index
    if name_list is not None:
        argval = name_list[name_index]
        argrepr = argval
    else:
        argrepr = repr(argval)
    return argval, argrepr

def _get_instructions_bytes(code, varnames=None, names=None, constants=None,
                      cells=None, linestarts=None, line_offset=0):
    """Iterate over the instructions in a bytecode string.

Generates a sequence of Instruction namedtuples giving the details of each
    opcode.  Additional information about the code's runtime environment
    (e.g. variable names, constants) can be specified using optional
    arguments.

"""
    labels = findlabels(code)
    starts_line = None
    for offset, op, arg in _unpack_opargs(code):
        if linestarts is not None:
            starts_line = linestarts.get(offset, None)
            if starts_line is not None:
                starts_line += line_offset
        is_jump_target = offset in labels
        argval = None
        argrepr = ''
        if arg is not None:
            #  Set argval to the dereferenced value of the argument when
            #  available, and argrepr to the string representation of argval.
            #    _disassemble_bytes needs the string repr of the
            #    raw name index for LOAD_GLOBAL, LOAD_CONST, etc.
            argval = arg
            if op in hasconst:
                argval, argrepr = _get_const_info(arg, constants)
            elif op in hasname:
                argval, argrepr = _get_name_info(arg, names)
            elif op in hasjabs:
                argval = arg*2
                argrepr = "to " + repr(argval)
            elif op in hasjrel:
                argval = offset + 2 + arg*2
                argrepr = "to " + repr(argval)
            elif op in haslocal:
                argval, argrepr = _get_name_info(arg, varnames)
            elif op in hascompare:
                argval = cmp_op[arg]
                argrepr = argval
            elif op in hasfree:
                argval, argrepr = _get_name_info(arg, cells)
            elif op == FORMAT_VALUE:
                argval, argrepr = FORMAT_VALUE_CONVERTERS[arg & 0x3]
                argval = (argval, bool(arg & 0x4))
                if argval[1]:
                    if argrepr:
                        argrepr += ', '
                    argrepr += 'with format'
            elif op == MAKE_FUNCTION:
                argrepr = ', '.join(s for i, s in enumerate(MAKE_FUNCTION_FLAGS)
                                    if arg & (1<<i))
        yield Instruction(opname[op], op,
                          arg, argval, argrepr,
                          offset, starts_line, is_jump_target)

def disassemble(co, lasti=-1, *, file=None):
    """Disassemble a code object."""
    cell_names = co.co_cellvars + co.co_freevars
    linestarts = dict(findlinestarts(co))
    _disassemble_bytes(co.co_code, lasti, co.co_varnames, co.co_names,
                       co.co_consts, cell_names, linestarts, file=file)

def _disassemble_recursive(co, *, file=None, depth=None):
    disassemble(co, file=file)
    if depth is None or depth > 0:
        if depth is not None:
            depth = depth - 1
        for x in co.co_consts:
            if hasattr(x, 'co_code'):
                print(file=file)
                print("Disassembly of %r:" % (x,), file=file)
                _disassemble_recursive(x, file=file, depth=depth)

def _disassemble_bytes(code, lasti=-1, varnames=None, names=None,
                       constants=None, cells=None, linestarts=None,
                       *, file=None, line_offset=0):
    # Omit the line number column entirely if we have no line number info
    show_lineno = bool(linestarts)
    if show_lineno:
        maxlineno = max(linestarts.values()) + line_offset
        if maxlineno >= 1000:
            lineno_width = len(str(maxlineno))
        else:
            lineno_width = 3
    else:
        lineno_width = 0
    maxoffset = len(code) - 2
    if maxoffset >= 10000:
        offset_width = len(str(maxoffset))
    else:
        offset_width = 4
    for instr in _get_instructions_bytes(code, varnames, names,
                                         constants, cells, linestarts,
                                         line_offset=line_offset):
        new_source_line = (show_lineno and
                           instr.starts_line is not None and
                           instr.offset > 0)
        if new_source_line:
            print(file=file)
        is_current_instr = instr.offset == lasti
        print(instr._disassemble(lineno_width, is_current_instr, offset_width),
              file=file)

def _disassemble_str(source, **kwargs):
    """Compile the source string, then disassemble the code object."""
    _disassemble_recursive(_try_compile(source, '<dis>'), **kwargs)

disco = disassemble                     # XXX For backwards compatibility

def _unpack_opargs(code):
    extended_arg = 0
    for i in range(0, len(code), 2):
        op = code[i]
        if op >= HAVE_ARGUMENT:
            arg = code[i+1] | extended_arg
            extended_arg = (arg << 8) if op == EXTENDED_ARG else 0
        else:
            arg = None
            extended_arg = 0
        yield (i, op, arg)

def findlabels(code):
    """Detect all offsets in a byte code which are jump targets.

Return the list of offsets.

"""
    labels = []
    for offset, op, arg in _unpack_opargs(code):
        if arg is not None:
            if op in hasjrel:
                label = offset + 2 + arg*2
            elif op in hasjabs:
                label = arg*2
            else:
                continue
            if label not in labels:
                labels.append(label)
    return labels

def findlinestarts(code):
    """Find the offsets in a byte code which are start of lines in the source.

Generate pairs (offset, lineno)
    """
    lastline = None
    for start, end, line in code.co_lines():
        if line is not None and line != lastline:
            lastline = line
            yield start, line
    return

class Bytecode:
    """The bytecode operations of a piece of code

Instantiate this with a function, method, other compiled object, string of
    code, or a code object (as returned by compile()).

Iterating over this yields the bytecode operations as Instruction instances.
    """
    def __init__(self, x, *, first_line=None, current_offset=None):
        self.codeobj = co = _get_code_object(x)
        if first_line is None:
            self.first_line = co.co_firstlineno
            self._line_offset = 0
        else:
            self.first_line = first_line
            self._line_offset = first_line - co.co_firstlineno
        self._cell_names = co.co_cellvars + co.co_freevars
        self._linestarts = dict(findlinestarts(co))
        self._original_object = x
        self.current_offset = current_offset

def __iter__(self):
        co = self.codeobj
        return _get_instructions_bytes(co.co_code, co.co_varnames, co.co_names,
                                       co.co_consts, self._cell_names,
                                       self._linestarts,
                                       line_offset=self._line_offset)

def __repr__(self):
        return "{}({!r})".format(self.__class__.__name__,
                                 self._original_object)

@classmethod
    def from_traceback(cls, tb):
        """ Construct a Bytecode from the given traceback """
        while tb.tb_next:
            tb = tb.tb_next
        return cls(tb.tb_frame.f_code, current_offset=tb.tb_lasti)

def info(self):
        """Return formatted information about the code object."""
        return _format_code_info(self.codeobj)

def dis(self):
        """Return a formatted view of the bytecode operations."""
        co = self.codeobj
        if self.current_offset is not None:
            offset = self.current_offset
        else:
            offset = -1
        with io.StringIO() as output:
            _disassemble_bytes(co.co_code, varnames=co.co_varnames,
                               names=co.co_names, constants=co.co_consts,
                               cells=self._cell_names,
                               linestarts=self._linestarts,
                               line_offset=self._line_offset,
                               file=output,
                               lasti=offset)
            return output.getvalue()

def _test():
    """Simple test program to disassemble a file."""
    import argparse

parser = argparse.ArgumentParser()
    parser.add_argument('infile', type=argparse.FileType('rb'), nargs='?', default='-')
    args = parser.parse_args()
    with args.infile as infile:
        source = infile.read()
    code = compile(source, args.infile.name, "exec")
    dis(code)

if __name__ == "__main__":
    _test()

cmd: