FM / python3.4

/opt/alt/python34/lib64/python3.4

Name	Size	Mode	Actions
asyncio/	-	0755	rm
collections/	-	0755	rm
concurrent/	-	0755	rm
config-3.4m/	-	0755	rm
ctypes/	-	0755	rm
curses/	-	0755	rm
dbm/	-	0755	rm
distutils/	-	0755	rm
email/	-	0755	rm
encodings/	-	0755	rm
ensurepip/	-	0755	rm
html/	-	0755	rm
http/	-	0755	rm
idlelib/	-	0755	rm
importlib/	-	0755	rm
json/	-	0755	rm
lib-dynload/	-	0755	rm
lib2to3/	-	0755	rm
logging/	-	0755	rm
multiprocessing/	-	0755	rm
plat-linux/	-	0755	rm
pydoc_data/	-	0755	rm
site-packages/	-	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
__pycache__/	-	0755	rm
abc.py	8624	0644	edit dl rm
aifc.py	31578	0644	edit dl rm
antigravity.py	475	0644	edit dl rm
argparse.py	90027	0644	edit dl rm
ast.py	12034	0644	edit dl rm
asynchat.py	11825	0644	edit dl rm
asyncore.py	20998	0644	edit dl rm
base64.py	20180	0755	edit dl rm
bdb.py	23354	0644	edit dl rm
binhex.py	13928	0644	edit dl rm
bisect.py	2595	0644	edit dl rm
bz2.py	18860	0644	edit dl rm
calendar.py	22941	0644	edit dl rm
cgi.py	35941	0755	edit dl rm
cgitb.py	12041	0644	edit dl rm
chunk.py	5425	0644	edit dl rm
cmd.py	14860	0644	edit dl rm
code.py	10037	0644	edit dl rm
codecs.py	35910	0644	edit dl rm
codeop.py	5994	0644	edit dl rm
colorsys.py	4064	0644	edit dl rm
compileall.py	9618	0644	edit dl rm
configparser.py	49698	0644	edit dl rm
contextlib.py	11639	0644	edit dl rm
copy.py	9005	0644	edit dl rm
copyreg.py	6833	0644	edit dl rm
cProfile.py	5324	0755	edit dl rm
crypt.py	1879	0644	edit dl rm
csv.py	16185	0644	edit dl rm
datetime.py	75804	0644	edit dl rm
decimal.py	228688	0644	edit dl rm
difflib.py	81684	0644	edit dl rm
dis.py	17160	0644	edit dl rm
doctest.py	104492	0644	edit dl rm
dummy_threading.py	2815	0644	edit dl rm
enum.py	21538	0644	edit dl rm
filecmp.py	9830	0644	edit dl rm
fileinput.py	14865	0644	edit dl rm
fnmatch.py	3163	0644	edit dl rm
formatter.py	15173	0644	edit dl rm
fractions.py	23203	0644	edit dl rm
ftplib.py	38532	0644	edit dl rm
functools.py	28511	0644	edit dl rm
genericpath.py	3882	0644	edit dl rm
getopt.py	7489	0644	edit dl rm
getpass.py	6069	0644	edit dl rm
gettext.py	20767	0644	edit dl rm
glob.py	3461	0644	edit dl rm
gzip.py	24314	0644	edit dl rm
hashlib.py	9850	0644	edit dl rm
heapq.py	17997	0644	edit dl rm
hmac.py	5063	0644	edit dl rm
imaplib.py	50267	0644	edit dl rm
imghdr.py	3528	0644	edit dl rm
imp.py	9984	0644	edit dl rm
inspect.py	104640	0644	edit dl rm
io.py	3396	0644	edit dl rm
ipaddress.py	71598	0644	edit dl rm
keyword.py	2222	0755	edit dl rm
linecache.py	3953	0644	edit dl rm
locale.py	74530	0644	edit dl rm
lzma.py	19371	0644	edit dl rm
macpath.py	5619	0644	edit dl rm
macurl2path.py	2732	0644	edit dl rm
mailbox.py	78382	0644	edit dl rm
mailcap.py	7437	0644	edit dl rm
mimetypes.py	20781	0644	edit dl rm
modulefinder.py	23421	0644	edit dl rm
netrc.py	5748	0644	edit dl rm
nntplib.py	43082	0644	edit dl rm
ntpath.py	20477	0644	edit dl rm
nturl2path.py	2444	0644	edit dl rm
numbers.py	10243	0644	edit dl rm
opcode.py	5442	0644	edit dl rm
operator.py	9195	0644	edit dl rm
optparse.py	60346	0644	edit dl rm
os.py	33882	0644	edit dl rm
pathlib.py	42467	0644	edit dl rm
pdb.py	60992	0755	edit dl rm
pickle.py	55989	0644	edit dl rm
pickletools.py	91762	0644	edit dl rm
pipes.py	8916	0644	edit dl rm
pkgutil.py	21215	0644	edit dl rm
platform.py	46761	0755	edit dl rm
plistlib.py	31791	0644	edit dl rm
poplib.py	14319	0644	edit dl rm
posixpath.py	13448	0644	edit dl rm
pprint.py	14919	0644	edit dl rm
profile.py	22032	0755	edit dl rm
pstats.py	26316	0644	edit dl rm
pty.py	4763	0644	edit dl rm
pyclbr.py	13520	0644	edit dl rm
pydoc.py	103011	0755	edit dl rm
py_compile.py	7103	0644	edit dl rm
queue.py	8835	0644	edit dl rm
quopri.py	7265	0755	edit dl rm
random.py	26084	0644	edit dl rm
re.py	15604	0644	edit dl rm
reprlib.py	5110	0644	edit dl rm
rlcompleter.py	6069	0644	edit dl rm
runpy.py	10816	0644	edit dl rm
sched.py	6354	0644	edit dl rm
selectors.py	17097	0644	edit dl rm
shelve.py	8528	0644	edit dl rm
shlex.py	11548	0644	edit dl rm
shutil.py	39902	0644	edit dl rm
site.py	21553	0644	edit dl rm
smtpd.py	29991	0755	edit dl rm
smtplib.py	38971	0755	edit dl rm
sndhdr.py	6256	0644	edit dl rm
socket.py	19067	0644	edit dl rm
socketserver.py	24372	0644	edit dl rm
sre_compile.py	19903	0644	edit dl rm
sre_constants.py	7267	0644	edit dl rm
sre_parse.py	31429	0644	edit dl rm
ssl.py	34747	0644	edit dl rm
stat.py	4400	0644	edit dl rm
statistics.py	19556	0644	edit dl rm
string.py	11445	0644	edit dl rm
stringprep.py	12917	0644	edit dl rm
struct.py	257	0644	edit dl rm
subprocess.py	64549	0644	edit dl rm
sunau.py	18095	0644	edit dl rm
symbol.py	2053	0755	edit dl rm
symtable.py	7404	0644	edit dl rm
sysconfig.py	24632	0644	edit dl rm
tabnanny.py	11410	0755	edit dl rm
tarfile.py	91557	0755	edit dl rm
telnetlib.py	23074	0644	edit dl rm
tempfile.py	22525	0644	edit dl rm
textwrap.py	19282	0644	edit dl rm
this.py	1003	0644	edit dl rm
threading.py	48802	0644	edit dl rm
timeit.py	11972	0755	edit dl rm
token.py	3034	0644	edit dl rm
tokenize.py	25596	0644	edit dl rm
trace.py	31487	0755	edit dl rm
traceback.py	11167	0644	edit dl rm
tracemalloc.py	15651	0644	edit dl rm
tty.py	879	0644	edit dl rm
types.py	5411	0644	edit dl rm
uu.py	6766	0755	edit dl rm
uuid.py	23724	0644	edit dl rm
warnings.py	14303	0644	edit dl rm
wave.py	17682	0644	edit dl rm
weakref.py	19384	0644	edit dl rm
webbrowser.py	21432	0755	edit dl rm
xdrlib.py	5913	0644	edit dl rm
zipfile.py	68547	0644	edit dl rm
_bootlocale.py	1301	0644	edit dl rm
_collections_abc.py	19898	0644	edit dl rm
_compat_pickle.py	8318	0644	edit dl rm
_dummy_thread.py	4872	0644	edit dl rm
_markupbase.py	14598	0644	edit dl rm
_osx_support.py	19101	0644	edit dl rm
_pyio.py	73893	0644	edit dl rm
_sitebuiltins.py	3115	0644	edit dl rm
_strptime.py	22053	0644	edit dl rm
_sysconfigdata.py	24480	0644	edit dl rm
_threading_local.py	7410	0644	edit dl rm
_weakrefset.py	5705	0644	edit dl rm
__future__.py	4584	0644	edit dl rm
__phello__.foo.py	64	0644	edit dl rm

Edit: /opt/alt/python34/lib64/python3.4/sre_compile.py (19903B)

#
# Secret Labs' Regular Expression Engine
#
# convert template to internal format
#
# Copyright (c) 1997-2001 by Secret Labs AB.  All rights reserved.
#
# See the sre.py file for information on usage and redistribution.
#

"""Internal support module for sre"""

import _sre
import sre_parse
from sre_constants import *
from _sre import MAXREPEAT

assert _sre.MAGIC == MAGIC, "SRE module mismatch"

if _sre.CODESIZE == 2:
    MAXCODE = 65535
else:
    MAXCODE = 0xFFFFFFFF

_LITERAL_CODES = set([LITERAL, NOT_LITERAL])
_REPEATING_CODES = set([REPEAT, MIN_REPEAT, MAX_REPEAT])
_SUCCESS_CODES = set([SUCCESS, FAILURE])
_ASSERT_CODES = set([ASSERT, ASSERT_NOT])

# Sets of lowercase characters which have the same uppercase.
_equivalences = (
    # LATIN SMALL LETTER I, LATIN SMALL LETTER DOTLESS I
    (0x69, 0x131), # iı
    # LATIN SMALL LETTER S, LATIN SMALL LETTER LONG S
    (0x73, 0x17f), # sſ
    # MICRO SIGN, GREEK SMALL LETTER MU
    (0xb5, 0x3bc), # µμ
    # COMBINING GREEK YPOGEGRAMMENI, GREEK SMALL LETTER IOTA, GREEK PROSGEGRAMMENI
    (0x345, 0x3b9, 0x1fbe), # \u0345ιι
    # GREEK SMALL LETTER IOTA WITH DIALYTIKA AND TONOS, GREEK SMALL LETTER IOTA WITH DIALYTIKA AND OXIA
    (0x390, 0x1fd3), # ΐΐ
    # GREEK SMALL LETTER UPSILON WITH DIALYTIKA AND TONOS, GREEK SMALL LETTER UPSILON WITH DIALYTIKA AND OXIA
    (0x3b0, 0x1fe3), # ΰΰ
    # GREEK SMALL LETTER BETA, GREEK BETA SYMBOL
    (0x3b2, 0x3d0), # βϐ
    # GREEK SMALL LETTER EPSILON, GREEK LUNATE EPSILON SYMBOL
    (0x3b5, 0x3f5), # εϵ
    # GREEK SMALL LETTER THETA, GREEK THETA SYMBOL
    (0x3b8, 0x3d1), # θϑ
    # GREEK SMALL LETTER KAPPA, GREEK KAPPA SYMBOL
    (0x3ba, 0x3f0), # κϰ
    # GREEK SMALL LETTER PI, GREEK PI SYMBOL
    (0x3c0, 0x3d6), # πϖ
    # GREEK SMALL LETTER RHO, GREEK RHO SYMBOL
    (0x3c1, 0x3f1), # ρϱ
    # GREEK SMALL LETTER FINAL SIGMA, GREEK SMALL LETTER SIGMA
    (0x3c2, 0x3c3), # ςσ
    # GREEK SMALL LETTER PHI, GREEK PHI SYMBOL
    (0x3c6, 0x3d5), # φϕ
    # LATIN SMALL LETTER S WITH DOT ABOVE, LATIN SMALL LETTER LONG S WITH DOT ABOVE
    (0x1e61, 0x1e9b), # ṡẛ
    # LATIN SMALL LIGATURE LONG S T, LATIN SMALL LIGATURE ST
    (0xfb05, 0xfb06), # ﬅﬆ
)

# Maps the lowercase code to lowercase codes which have the same uppercase.
_ignorecase_fixes = {i: tuple(j for j in t if i != j)
                     for t in _equivalences for i in t}

def _compile(code, pattern, flags):
    # internal: compile a (sub)pattern
    emit = code.append
    _len = len
    LITERAL_CODES = _LITERAL_CODES
    REPEATING_CODES = _REPEATING_CODES
    SUCCESS_CODES = _SUCCESS_CODES
    ASSERT_CODES = _ASSERT_CODES
    if (flags & SRE_FLAG_IGNORECASE and
            not (flags & SRE_FLAG_LOCALE) and
            flags & SRE_FLAG_UNICODE):
        fixes = _ignorecase_fixes
    else:
        fixes = None
    for op, av in pattern:
        if op in LITERAL_CODES:
            if flags & SRE_FLAG_IGNORECASE:
                lo = _sre.getlower(av, flags)
                if fixes and lo in fixes:
                    emit(OPCODES[IN_IGNORE])
                    skip = _len(code); emit(0)
                    if op is NOT_LITERAL:
                        emit(OPCODES[NEGATE])
                    for k in (lo,) + fixes[lo]:
                        emit(OPCODES[LITERAL])
                        emit(k)
                    emit(OPCODES[FAILURE])
                    code[skip] = _len(code) - skip
                else:
                    emit(OPCODES[OP_IGNORE[op]])
                    emit(lo)
            else:
                emit(OPCODES[op])
                emit(av)
        elif op is IN:
            if flags & SRE_FLAG_IGNORECASE:
                emit(OPCODES[OP_IGNORE[op]])
                def fixup(literal, flags=flags):
                    return _sre.getlower(literal, flags)
            else:
                emit(OPCODES[op])
                fixup = None
            skip = _len(code); emit(0)
            _compile_charset(av, flags, code, fixup, fixes)
            code[skip] = _len(code) - skip
        elif op is ANY:
            if flags & SRE_FLAG_DOTALL:
                emit(OPCODES[ANY_ALL])
            else:
                emit(OPCODES[ANY])
        elif op in REPEATING_CODES:
            if flags & SRE_FLAG_TEMPLATE:
                raise error("internal: unsupported template operator")
            elif _simple(av) and op is not REPEAT:
                if op is MAX_REPEAT:
                    emit(OPCODES[REPEAT_ONE])
                else:
                    emit(OPCODES[MIN_REPEAT_ONE])
                skip = _len(code); emit(0)
                emit(av[0])
                emit(av[1])
                _compile(code, av[2], flags)
                emit(OPCODES[SUCCESS])
                code[skip] = _len(code) - skip
            else:
                emit(OPCODES[REPEAT])
                skip = _len(code); emit(0)
                emit(av[0])
                emit(av[1])
                _compile(code, av[2], flags)
                code[skip] = _len(code) - skip
                if op is MAX_REPEAT:
                    emit(OPCODES[MAX_UNTIL])
                else:
                    emit(OPCODES[MIN_UNTIL])
        elif op is SUBPATTERN:
            if av[0]:
                emit(OPCODES[MARK])
                emit((av[0]-1)*2)
            # _compile_info(code, av[1], flags)
            _compile(code, av[1], flags)
            if av[0]:
                emit(OPCODES[MARK])
                emit((av[0]-1)*2+1)
        elif op in SUCCESS_CODES:
            emit(OPCODES[op])
        elif op in ASSERT_CODES:
            emit(OPCODES[op])
            skip = _len(code); emit(0)
            if av[0] >= 0:
                emit(0) # look ahead
            else:
                lo, hi = av[1].getwidth()
                if lo != hi:
                    raise error("look-behind requires fixed-width pattern")
                emit(lo) # look behind
            _compile(code, av[1], flags)
            emit(OPCODES[SUCCESS])
            code[skip] = _len(code) - skip
        elif op is CALL:
            emit(OPCODES[op])
            skip = _len(code); emit(0)
            _compile(code, av, flags)
            emit(OPCODES[SUCCESS])
            code[skip] = _len(code) - skip
        elif op is AT:
            emit(OPCODES[op])
            if flags & SRE_FLAG_MULTILINE:
                av = AT_MULTILINE.get(av, av)
            if flags & SRE_FLAG_LOCALE:
                av = AT_LOCALE.get(av, av)
            elif flags & SRE_FLAG_UNICODE:
                av = AT_UNICODE.get(av, av)
            emit(ATCODES[av])
        elif op is BRANCH:
            emit(OPCODES[op])
            tail = []
            tailappend = tail.append
            for av in av[1]:
                skip = _len(code); emit(0)
                # _compile_info(code, av, flags)
                _compile(code, av, flags)
                emit(OPCODES[JUMP])
                tailappend(_len(code)); emit(0)
                code[skip] = _len(code) - skip
            emit(0) # end of branch
            for tail in tail:
                code[tail] = _len(code) - tail
        elif op is CATEGORY:
            emit(OPCODES[op])
            if flags & SRE_FLAG_LOCALE:
                av = CH_LOCALE[av]
            elif flags & SRE_FLAG_UNICODE:
                av = CH_UNICODE[av]
            emit(CHCODES[av])
        elif op is GROUPREF:
            if flags & SRE_FLAG_IGNORECASE:
                emit(OPCODES[OP_IGNORE[op]])
            else:
                emit(OPCODES[op])
            emit(av-1)
        elif op is GROUPREF_EXISTS:
            emit(OPCODES[op])
            emit(av[0]-1)
            skipyes = _len(code); emit(0)
            _compile(code, av[1], flags)
            if av[2]:
                emit(OPCODES[JUMP])
                skipno = _len(code); emit(0)
                code[skipyes] = _len(code) - skipyes + 1
                _compile(code, av[2], flags)
                code[skipno] = _len(code) - skipno
            else:
                code[skipyes] = _len(code) - skipyes + 1
        else:
            raise ValueError("unsupported operand type", op)

def _compile_charset(charset, flags, code, fixup=None, fixes=None):
    # compile charset subprogram
    emit = code.append
    for op, av in _optimize_charset(charset, fixup, fixes,
                                    flags & SRE_FLAG_UNICODE):
        emit(OPCODES[op])
        if op is NEGATE:
            pass
        elif op is LITERAL:
            emit(av)
        elif op is RANGE:
            emit(av[0])
            emit(av[1])
        elif op is CHARSET:
            code.extend(av)
        elif op is BIGCHARSET:
            code.extend(av)
        elif op is CATEGORY:
            if flags & SRE_FLAG_LOCALE:
                emit(CHCODES[CH_LOCALE[av]])
            elif flags & SRE_FLAG_UNICODE:
                emit(CHCODES[CH_UNICODE[av]])
            else:
                emit(CHCODES[av])
        else:
            raise error("internal: unsupported set operator")
    emit(OPCODES[FAILURE])

def _optimize_charset(charset, fixup, fixes, isunicode):
    # internal: optimize character set
    out = []
    tail = []
    charmap = bytearray(256)
    for op, av in charset:
        while True:
            try:
                if op is LITERAL:
                    if fixup:
                        i = fixup(av)
                        charmap[i] = 1
                        if fixes and i in fixes:
                            for k in fixes[i]:
                                charmap[k] = 1
                    else:
                        charmap[av] = 1
                elif op is RANGE:
                    r = range(av[0], av[1]+1)
                    if fixup:
                        r = map(fixup, r)
                    if fixup and fixes:
                        for i in r:
                            charmap[i] = 1
                            if i in fixes:
                                for k in fixes[i]:
                                    charmap[k] = 1
                    else:
                        for i in r:
                            charmap[i] = 1
                elif op is NEGATE:
                    out.append((op, av))
                else:
                    tail.append((op, av))
            except IndexError:
                if len(charmap) == 256:
                    # character set contains non-UCS1 character codes
                    charmap += b'\0' * 0xff00
                    continue
                # character set contains non-BMP character codes
                if fixup and isunicode and op is RANGE:
                    lo, hi = av
                    ranges = [av]
                    # There are only two ranges of cased astral characters:
                    # 10400-1044F (Deseret) and 118A0-118DF (Warang Citi).
                    _fixup_range(max(0x10000, lo), min(0x11fff, hi),
                                 ranges, fixup)
                    for lo, hi in ranges:
                        if lo == hi:
                            tail.append((LITERAL, hi))
                        else:
                            tail.append((RANGE, (lo, hi)))
                else:
                    tail.append((op, av))
            break

# compress character map
    runs = []
    q = 0
    while True:
        p = charmap.find(1, q)
        if p < 0:
            break
        if len(runs) >= 2:
            runs = None
            break
        q = charmap.find(0, p)
        if q < 0:
            runs.append((p, len(charmap)))
            break
        runs.append((p, q))
    if runs is not None:
        # use literal/range
        for p, q in runs:
            if q - p == 1:
                out.append((LITERAL, p))
            else:
                out.append((RANGE, (p, q - 1)))
        out += tail
        # if the case was changed or new representation is more compact
        if fixup or len(out) < len(charset):
            return out
        # else original character set is good enough
        return charset

# use bitmap
    if len(charmap) == 256:
        data = _mk_bitmap(charmap)
        out.append((CHARSET, data))
        out += tail
        return out

# To represent a big charset, first a bitmap of all characters in the
    # set is constructed. Then, this bitmap is sliced into chunks of 256
    # characters, duplicate chunks are eliminated, and each chunk is
    # given a number. In the compiled expression, the charset is
    # represented by a 32-bit word sequence, consisting of one word for
    # the number of different chunks, a sequence of 256 bytes (64 words)
    # of chunk numbers indexed by their original chunk position, and a
    # sequence of 256-bit chunks (8 words each).

# Compression is normally good: in a typical charset, large ranges of
    # Unicode will be either completely excluded (e.g. if only cyrillic
    # letters are to be matched), or completely included (e.g. if large
    # subranges of Kanji match). These ranges will be represented by
    # chunks of all one-bits or all zero-bits.

# Matching can be also done efficiently: the more significant byte of
    # the Unicode character is an index into the chunk number, and the
    # less significant byte is a bit index in the chunk (just like the
    # CHARSET matching).

charmap = bytes(charmap) # should be hashable
    comps = {}
    mapping = bytearray(256)
    block = 0
    data = bytearray()
    for i in range(0, 65536, 256):
        chunk = charmap[i: i + 256]
        if chunk in comps:
            mapping[i // 256] = comps[chunk]
        else:
            mapping[i // 256] = comps[chunk] = block
            block += 1
            data += chunk
    data = _mk_bitmap(data)
    data[0:0] = [block] + _bytes_to_codes(mapping)
    out.append((BIGCHARSET, data))
    out += tail
    return out

def _fixup_range(lo, hi, ranges, fixup):
    for i in map(fixup, range(lo, hi+1)):
        for k, (lo, hi) in enumerate(ranges):
            if i < lo:
                if l == lo - 1:
                    ranges[k] = (i, hi)
                else:
                    ranges.insert(k, (i, i))
                break
            elif i > hi:
                if i == hi + 1:
                    ranges[k] = (lo, i)
                    break
            else:
                break
        else:
            ranges.append((i, i))

_CODEBITS = _sre.CODESIZE * 8
_BITS_TRANS = b'0' + b'1' * 255
def _mk_bitmap(bits, _CODEBITS=_CODEBITS, _int=int):
    s = bits.translate(_BITS_TRANS)[::-1]
    return [_int(s[i - _CODEBITS: i], 2)
            for i in range(len(s), 0, -_CODEBITS)]

def _bytes_to_codes(b):
    # Convert block indices to word array
    a = memoryview(b).cast('I')
    assert a.itemsize == _sre.CODESIZE
    assert len(a) * a.itemsize == len(b)
    return a.tolist()

def _simple(av):
    # check if av is a "simple" operator
    lo, hi = av[2].getwidth()
    return lo == hi == 1 and av[2][0][0] != SUBPATTERN

def _generate_overlap_table(prefix):
    """
    Generate an overlap table for the following prefix.
    An overlap table is a table of the same size as the prefix which
    informs about the potential self-overlap for each index in the prefix:
    - if overlap[i] == 0, prefix[i:] can't overlap prefix[0:...]
    - if overlap[i] == k with 0 < k <= i, prefix[i-k+1:i+1] overlaps with
      prefix[0:k]
    """
    table = [0] * len(prefix)
    for i in range(1, len(prefix)):
        idx = table[i - 1]
        while prefix[i] != prefix[idx]:
            if idx == 0:
                table[i] = 0
                break
            idx = table[idx - 1]
        else:
            table[i] = idx + 1
    return table

def _compile_info(code, pattern, flags):
    # internal: compile an info block.  in the current version,
    # this contains min/max pattern width, and an optional literal
    # prefix or a character map
    lo, hi = pattern.getwidth()
    if lo == 0:
        return # not worth it
    # look for a literal prefix
    prefix = []
    prefixappend = prefix.append
    prefix_skip = 0
    charset = [] # not used
    charsetappend = charset.append
    if not (flags & SRE_FLAG_IGNORECASE):
        # look for literal prefix
        for op, av in pattern.data:
            if op is LITERAL:
                if len(prefix) == prefix_skip:
                    prefix_skip = prefix_skip + 1
                prefixappend(av)
            elif op is SUBPATTERN and len(av[1]) == 1:
                op, av = av[1][0]
                if op is LITERAL:
                    prefixappend(av)
                else:
                    break
            else:
                break
        # if no prefix, look for charset prefix
        if not prefix and pattern.data:
            op, av = pattern.data[0]
            if op is SUBPATTERN and av[1]:
                op, av = av[1][0]
                if op is LITERAL:
                    charsetappend((op, av))
                elif op is BRANCH:
                    c = []
                    cappend = c.append
                    for p in av[1]:
                        if not p:
                            break
                        op, av = p[0]
                        if op is LITERAL:
                            cappend((op, av))
                        else:
                            break
                    else:
                        charset = c
            elif op is BRANCH:
                c = []
                cappend = c.append
                for p in av[1]:
                    if not p:
                        break
                    op, av = p[0]
                    if op is LITERAL:
                        cappend((op, av))
                    else:
                        break
                else:
                    charset = c
            elif op is IN:
                charset = av
##     if prefix:
##         print "*** PREFIX", prefix, prefix_skip
##     if charset:
##         print "*** CHARSET", charset
    # add an info block
    emit = code.append
    emit(OPCODES[INFO])
    skip = len(code); emit(0)
    # literal flag
    mask = 0
    if prefix:
        mask = SRE_INFO_PREFIX
        if len(prefix) == prefix_skip == len(pattern.data):
            mask = mask + SRE_INFO_LITERAL
    elif charset:
        mask = mask + SRE_INFO_CHARSET
    emit(mask)
    # pattern length
    if lo < MAXCODE:
        emit(lo)
    else:
        emit(MAXCODE)
        prefix = prefix[:MAXCODE]
    if hi < MAXCODE:
        emit(hi)
    else:
        emit(0)
    # add literal prefix
    if prefix:
        emit(len(prefix)) # length
        emit(prefix_skip) # skip
        code.extend(prefix)
        # generate overlap table
        code.extend(_generate_overlap_table(prefix))
    elif charset:
        _compile_charset(charset, flags, code)
    code[skip] = len(code) - skip

def isstring(obj):
    return isinstance(obj, (str, bytes))

def _code(p, flags):

flags = p.pattern.flags | flags
    code = []

# compile info block
    _compile_info(code, p, flags)

# compile the pattern
    _compile(code, p.data, flags)

code.append(OPCODES[SUCCESS])

return code

def compile(p, flags=0):
    # internal: convert pattern list to internal format

if isstring(p):
        pattern = p
        p = sre_parse.parse(p, flags)
    else:
        pattern = None

code = _code(p, flags)

# print code

# XXX: <fl> get rid of this limitation!
    if p.pattern.groups > 100:
        raise AssertionError(
            "sorry, but this version only supports 100 named groups"
            )

# map in either direction
    groupindex = p.pattern.groupdict
    indexgroup = [None] * p.pattern.groups
    for k, i in groupindex.items():
        indexgroup[i] = k

return _sre.compile(
        pattern, flags | p.pattern.flags, code,
        p.pattern.groups-1,
        groupindex, indexgroup
        )

cmd: