Gecko [ tsuru-no-tsurugi.tokyo ]

Name	Size	Permission	Date
__pycache__	[ DIR ]	drwxr-xr-x	2026-02-11 09:21
asyncio	[ DIR ]	drwxr-xr-x	2026-02-11 09:21
collections	[ DIR ]	drwxr-xr-x	2026-02-11 09:21
concurrent	[ DIR ]	drwxr-xr-x	2026-02-11 09:21
ctypes	[ DIR ]	drwxr-xr-x	2026-02-11 09:21
curses	[ DIR ]	drwxr-xr-x	2026-02-11 09:21
dbm	[ DIR ]	drwxr-xr-x	2026-02-11 09:21
distutils	[ DIR ]	drwxr-xr-x	2026-02-11 09:21
email	[ DIR ]	drwxr-xr-x	2026-02-11 09:21
encodings	[ DIR ]	drwxr-xr-x	2026-02-11 09:21
html	[ DIR ]	drwxr-xr-x	2026-02-11 09:21
http	[ DIR ]	drwxr-xr-x	2026-02-11 09:21
importlib	[ DIR ]	drwxr-xr-x	2026-02-11 09:21
json	[ DIR ]	drwxr-xr-x	2026-02-11 09:21
lib-dynload	[ DIR ]	drwxr-xr-x	2026-02-11 09:21
lib2to3	[ DIR ]	drwxr-xr-x	2026-02-11 09:21
logging	[ DIR ]	drwxr-xr-x	2026-02-11 09:21
multiprocessing	[ DIR ]	drwxr-xr-x	2026-02-11 09:21
pydoc_data	[ DIR ]	drwxr-xr-x	2026-02-11 09:21
sqlite3	[ DIR ]	drwxr-xr-x	2026-02-11 09:21
test	[ DIR ]	drwxr-xr-x	2026-02-11 09:21
unittest	[ DIR ]	drwxr-xr-x	2026-02-11 09:21
urllib	[ DIR ]	drwxr-xr-x	2026-02-11 09:21
venv	[ DIR ]	drwxr-xr-x	2026-02-11 09:21
wsgiref	[ DIR ]	drwxr-xr-x	2026-02-11 09:21
xml	[ DIR ]	drwxr-xr-x	2026-02-11 09:21
xmlrpc	[ DIR ]	drwxr-xr-x	2026-02-11 09:21
LICENSE.txt	13.6 KB	-rw-r--r--	2026-01-28 05:16
__future__.py	5.03 KB	-rw-r--r--	2026-01-28 05:16
__phello__.foo.py	64 B	-rw-r--r--	2026-01-28 05:16
_bootlocale.py	1.76 KB	-rw-r--r--	2026-01-28 05:16
_collections_abc.py	25.49 KB	-rw-r--r--	2026-01-28 05:16
_compat_pickle.py	8.54 KB	-rw-r--r--	2026-01-28 05:16
_compression.py	5.21 KB	-rw-r--r--	2026-01-28 05:16
_dummy_thread.py	5.89 KB	-rw-r--r--	2026-01-28 05:16
_markupbase.py	14.26 KB	-rw-r--r--	2026-01-28 05:16
_osx_support.py	21.26 KB	-rw-r--r--	2026-01-28 05:16
_py_abc.py	6.04 KB	-rw-r--r--	2026-01-28 05:16
_pydecimal.py	223.31 KB	-rw-r--r--	2026-01-28 05:16
_pyio.py	90.99 KB	-rw-r--r--	2026-01-28 05:16
_sitebuiltins.py	3.04 KB	-rw-r--r--	2026-01-28 05:16
_strptime.py	24.68 KB	-rw-r--r--	2026-01-28 05:16
_sysconfigdata__linux_x86_64-linux-gnu.py	25.23 KB	-rw-r--r--	2026-01-28 05:16
_sysconfigdata__x86_64-linux-gnu.py	25.23 KB	-rw-r--r--	2026-01-28 05:16
_threading_local.py	7.05 KB	-rw-r--r--	2026-01-28 05:16
_weakrefset.py	5.6 KB	-rw-r--r--	2026-01-28 05:16
abc.py	4.38 KB	-rw-r--r--	2026-01-28 05:16
aifc.py	32.04 KB	-rw-r--r--	2026-01-28 05:16
antigravity.py	477 B	-rw-r--r--	2026-01-28 05:16
argparse.py	94.05 KB	-rw-r--r--	2026-01-28 05:16
ast.py	18.78 KB	-rw-r--r--	2026-01-28 05:16
asynchat.py	11.06 KB	-rw-r--r--	2026-01-28 05:16
asyncore.py	19.62 KB	-rw-r--r--	2026-01-28 05:16
base64.py	19.9 KB	-rwxr-xr-x	2026-01-28 05:16
bdb.py	31.3 KB	-rw-r--r--	2026-01-28 05:16
binhex.py	13.63 KB	-rw-r--r--	2026-01-28 05:16
bisect.py	2.16 KB	-rw-r--r--	2026-01-28 05:16
bz2.py	12.26 KB	-rw-r--r--	2026-01-28 05:16
cProfile.py	6.83 KB	-rwxr-xr-x	2026-01-28 05:16
calendar.py	24.25 KB	-rw-r--r--	2026-01-28 05:16
cgi.py	33.14 KB	-rwxr-xr-x	2026-01-28 05:16
cgitb.py	11.81 KB	-rw-r--r--	2026-01-28 05:16
chunk.py	5.31 KB	-rw-r--r--	2026-01-28 05:16
cmd.py	14.51 KB	-rw-r--r--	2026-01-28 05:16
code.py	10.37 KB	-rw-r--r--	2026-01-28 05:16
codecs.py	35.81 KB	-rw-r--r--	2026-01-28 05:16
codeop.py	6.18 KB	-rw-r--r--	2026-01-28 05:16
colorsys.py	3.97 KB	-rw-r--r--	2026-01-28 05:16
compileall.py	13.36 KB	-rw-r--r--	2026-01-28 05:16
configparser.py	53.1 KB	-rw-r--r--	2026-01-28 05:16
contextlib.py	24.41 KB	-rw-r--r--	2026-01-28 05:16
contextvars.py	129 B	-rw-r--r--	2026-01-28 05:16
copy.py	8.46 KB	-rw-r--r--	2026-01-28 05:16
copyreg.py	6.97 KB	-rw-r--r--	2026-01-28 05:16
crypt.py	3.53 KB	-rw-r--r--	2026-01-28 05:16
csv.py	15.77 KB	-rw-r--r--	2026-01-28 05:16
dataclasses.py	48.8 KB	-rw-r--r--	2026-01-28 05:16
datetime.py	86.22 KB	-rw-r--r--	2026-01-28 05:16
decimal.py	320 B	-rw-r--r--	2026-01-28 05:16
difflib.py	82.09 KB	-rw-r--r--	2026-01-28 05:16
dis.py	20.09 KB	-rw-r--r--	2026-01-28 05:16
doctest.py	102.09 KB	-rw-r--r--	2026-01-28 05:16
dummy_threading.py	2.75 KB	-rw-r--r--	2026-01-28 05:16
enum.py	37.24 KB	-rw-r--r--	2026-01-28 05:16
filecmp.py	9.6 KB	-rw-r--r--	2026-01-28 05:16
fileinput.py	14.36 KB	-rw-r--r--	2026-01-28 05:16
fnmatch.py	3.98 KB	-rw-r--r--	2026-01-28 05:16
formatter.py	14.79 KB	-rw-r--r--	2026-01-28 05:16
fractions.py	23.76 KB	-rw-r--r--	2026-01-28 05:16
ftplib.py	34.31 KB	-rw-r--r--	2026-01-28 05:16
functools.py	36.53 KB	-rw-r--r--	2026-01-28 05:16
genericpath.py	4.86 KB	-rw-r--r--	2026-01-28 05:16
getopt.py	7.31 KB	-rw-r--r--	2026-01-28 05:16
getpass.py	5.85 KB	-rw-r--r--	2026-01-28 05:16
gettext.py	26.92 KB	-rw-r--r--	2026-01-28 05:16
glob.py	5.56 KB	-rw-r--r--	2026-01-28 05:16
gzip.py	20.91 KB	-rw-r--r--	2026-01-28 05:16
hashlib.py	9.5 KB	-rw-r--r--	2026-01-28 05:16
heapq.py	22.34 KB	-rw-r--r--	2026-01-28 05:16
hmac.py	6.47 KB	-rw-r--r--	2026-01-28 05:16
imaplib.py	52.51 KB	-rw-r--r--	2026-01-28 05:16
imghdr.py	3.72 KB	-rw-r--r--	2026-01-28 05:16
imp.py	10.29 KB	-rw-r--r--	2026-01-28 05:16
inspect.py	115.77 KB	-rw-r--r--	2026-01-28 05:16
io.py	3.46 KB	-rw-r--r--	2026-01-28 05:16
ipaddress.py	74.55 KB	-rw-r--r--	2026-01-28 05:16
keyword.py	945 B	-rw-r--r--	2026-01-28 05:16
linecache.py	5.21 KB	-rw-r--r--	2026-01-28 05:16
locale.py	76.36 KB	-rw-r--r--	2026-01-28 05:16
lzma.py	12.68 KB	-rw-r--r--	2026-01-28 05:16
mailbox.py	76.82 KB	-rw-r--r--	2026-01-28 05:16
mailcap.py	8.85 KB	-rw-r--r--	2026-01-28 05:16
mimetypes.py	21.16 KB	-rw-r--r--	2026-01-28 05:16
modulefinder.py	23.86 KB	-rw-r--r--	2026-01-28 05:16
netrc.py	5.44 KB	-rw-r--r--	2026-01-28 05:16
nntplib.py	42.25 KB	-rw-r--r--	2026-01-28 05:16
ntpath.py	25.21 KB	-rw-r--r--	2026-01-28 05:16
nturl2path.py	2.82 KB	-rw-r--r--	2026-01-28 05:16
numbers.py	10 KB	-rw-r--r--	2026-01-28 05:16
opcode.py	5.67 KB	-rw-r--r--	2026-01-28 05:16
operator.py	10.46 KB	-rw-r--r--	2026-01-28 05:16
optparse.py	58.95 KB	-rw-r--r--	2026-01-28 05:16
os.py	38.08 KB	-rw-r--r--	2026-01-28 05:16
pathlib.py	51.38 KB	-rw-r--r--	2026-01-28 05:16
pdb.py	61.27 KB	-rwxr-xr-x	2026-01-28 05:16
pickle.py	62.96 KB	-rw-r--r--	2026-01-28 05:16
pickletools.py	91.29 KB	-rw-r--r--	2026-01-28 05:16
pipes.py	8.71 KB	-rw-r--r--	2026-01-28 05:16
pkgutil.py	20.96 KB	-rw-r--r--	2026-01-28 05:16
platform.py	39.48 KB	-rwxr-xr-x	2026-01-28 05:16
plistlib.py	31.7 KB	-rw-r--r--	2026-01-28 05:16
poplib.py	14.84 KB	-rw-r--r--	2026-01-28 05:16
posixpath.py	15.14 KB	-rw-r--r--	2026-01-28 05:16
pprint.py	20.98 KB	-rw-r--r--	2026-01-28 05:16
profile.py	22.98 KB	-rwxr-xr-x	2026-01-28 05:16
pstats.py	26.7 KB	-rw-r--r--	2026-01-28 05:16
pty.py	4.69 KB	-rw-r--r--	2026-01-28 05:16
py_compile.py	7.96 KB	-rw-r--r--	2026-01-28 05:16
pyclbr.py	14.9 KB	-rw-r--r--	2026-01-28 05:16
pydoc.py	104.36 KB	-rwxr-xr-x	2026-01-28 05:16
queue.py	11.09 KB	-rw-r--r--	2026-01-28 05:16
quopri.py	7.08 KB	-rwxr-xr-x	2026-01-28 05:16
random.py	28.13 KB	-rw-r--r--	2026-01-28 05:16
re.py	15.49 KB	-rw-r--r--	2026-01-28 05:16
reprlib.py	5.14 KB	-rw-r--r--	2026-01-28 05:16
rlcompleter.py	6.93 KB	-rw-r--r--	2026-01-28 05:16
runpy.py	11.77 KB	-rw-r--r--	2026-01-28 05:16
sched.py	6.29 KB	-rw-r--r--	2026-01-28 05:16
secrets.py	1.99 KB	-rw-r--r--	2026-01-28 05:16
selectors.py	18.13 KB	-rw-r--r--	2026-01-28 05:16
shelve.py	8.33 KB	-rw-r--r--	2026-01-28 05:16
shlex.py	13.01 KB	-rw-r--r--	2026-01-28 05:16
shutil.py	50.27 KB	-rw-r--r--	2026-01-28 05:16
signal.py	2.22 KB	-rw-r--r--	2026-01-28 05:16
site.py	21.81 KB	-rw-r--r--	2026-01-28 05:16
smtpd.py	33.9 KB	-rwxr-xr-x	2026-01-28 05:16
smtplib.py	43.75 KB	-rwxr-xr-x	2026-01-28 05:16
sndhdr.py	6.93 KB	-rw-r--r--	2026-01-28 05:16
socket.py	34.42 KB	-rw-r--r--	2026-01-28 05:16
socketserver.py	26.66 KB	-rw-r--r--	2026-01-28 05:16
sre_compile.py	26.07 KB	-rw-r--r--	2026-01-28 05:16
sre_constants.py	6.99 KB	-rw-r--r--	2026-01-28 05:16
sre_parse.py	39.29 KB	-rw-r--r--	2026-01-28 05:16
ssl.py	51.14 KB	-rw-r--r--	2026-01-28 05:16
stat.py	5.36 KB	-rw-r--r--	2026-01-28 05:16
statistics.py	38.76 KB	-rw-r--r--	2026-01-28 05:16
string.py	10.29 KB	-rw-r--r--	2026-01-28 05:16
stringprep.py	12.61 KB	-rw-r--r--	2026-01-28 05:16
struct.py	257 B	-rw-r--r--	2026-01-28 05:16
subprocess.py	75.52 KB	-rw-r--r--	2026-01-28 05:16
sunau.py	17.94 KB	-rw-r--r--	2026-01-28 05:16
symbol.py	2.06 KB	-rw-r--r--	2026-01-28 05:16
symtable.py	7.83 KB	-rw-r--r--	2026-01-28 05:16
sysconfig.py	24.45 KB	-rw-r--r--	2026-01-28 05:16
tabnanny.py	11.14 KB	-rwxr-xr-x	2026-01-28 05:16
tarfile.py	93.34 KB	-rwxr-xr-x	2026-01-28 05:16
telnetlib.py	22.71 KB	-rw-r--r--	2026-01-28 05:16
tempfile.py	32.15 KB	-rw-r--r--	2026-01-28 05:16
textwrap.py	18.95 KB	-rw-r--r--	2026-01-28 05:16
this.py	1003 B	-rw-r--r--	2026-01-28 05:16
threading.py	49.63 KB	-rw-r--r--	2026-01-28 05:16
timeit.py	13.16 KB	-rwxr-xr-x	2026-01-28 05:16
token.py	2.31 KB	-rw-r--r--	2026-01-28 05:16
tokenize.py	25.24 KB	-rw-r--r--	2026-01-28 05:16
trace.py	29.16 KB	-rwxr-xr-x	2026-01-28 05:16
traceback.py	23.06 KB	-rw-r--r--	2026-01-28 05:16
tracemalloc.py	16.68 KB	-rw-r--r--	2026-01-28 05:16
tty.py	879 B	-rw-r--r--	2026-01-28 05:16
turtle.py	140.35 KB	-rw-r--r--	2026-01-28 05:16
types.py	9.49 KB	-rw-r--r--	2026-01-28 05:16
typing.py	67.35 KB	-rw-r--r--	2026-01-28 05:16
uu.py	6.79 KB	-rwxr-xr-x	2026-01-28 05:16
uuid.py	29.75 KB	-rw-r--r--	2026-01-28 05:16
warnings.py	19.23 KB	-rw-r--r--	2026-01-28 05:16
wave.py	17.8 KB	-rw-r--r--	2026-01-28 05:16
weakref.py	20.89 KB	-rw-r--r--	2026-01-28 05:16
webbrowser.py	23.52 KB	-rwxr-xr-x	2026-01-28 05:16
xdrlib.py	5.77 KB	-rw-r--r--	2026-01-28 05:16
zipapp.py	7.36 KB	-rw-r--r--	2026-01-28 05:16
zipfile.py	87.05 KB	-rw-r--r--	2026-01-28 05:16
zipimport.py	30.04 KB	-rw-r--r--	2026-01-28 05:16

Rename

"""Recognize image file formats based on their first few bytes."""

from os import PathLike

__all__ = ["what"]

#-------------------------#
# Recognize image headers #
#-------------------------#

def what(file, h=None):
    f = None
    try:
        if h is None:
            if isinstance(file, (str, PathLike)):
                f = open(file, 'rb')
                h = f.read(32)
            else:
                location = file.tell()
                h = file.read(32)
                file.seek(location)
        for tf in tests:
            res = tf(h, f)
            if res:
                return res
    finally:
        if f: f.close()
    return None

#---------------------------------#
# Subroutines per image file type #
#---------------------------------#

tests = []

def test_jpeg(h, f):
    """JPEG data in JFIF or Exif format"""
    if h[6:10] in (b'JFIF', b'Exif'):
        return 'jpeg'

tests.append(test_jpeg)

def test_png(h, f):
    if h.startswith(b'\211PNG\r\n\032\n'):
        return 'png'

tests.append(test_png)

def test_gif(h, f):
    """GIF ('87 and '89 variants)"""
    if h[:6] in (b'GIF87a', b'GIF89a'):
        return 'gif'

tests.append(test_gif)

def test_tiff(h, f):
    """TIFF (can be in Motorola or Intel byte order)"""
    if h[:2] in (b'MM', b'II'):
        return 'tiff'

tests.append(test_tiff)

def test_rgb(h, f):
    """SGI image library"""
    if h.startswith(b'\001\332'):
        return 'rgb'

tests.append(test_rgb)

def test_pbm(h, f):
    """PBM (portable bitmap)"""
    if len(h) >= 3 and \
        h[0] == ord(b'P') and h[1] in b'14' and h[2] in b' \t\n\r':
        return 'pbm'

tests.append(test_pbm)

def test_pgm(h, f):
    """PGM (portable graymap)"""
    if len(h) >= 3 and \
        h[0] == ord(b'P') and h[1] in b'25' and h[2] in b' \t\n\r':
        return 'pgm'

tests.append(test_pgm)

def test_ppm(h, f):
    """PPM (portable pixmap)"""
    if len(h) >= 3 and \
        h[0] == ord(b'P') and h[1] in b'36' and h[2] in b' \t\n\r':
        return 'ppm'

tests.append(test_ppm)

def test_rast(h, f):
    """Sun raster file"""
    if h.startswith(b'\x59\xA6\x6A\x95'):
        return 'rast'

tests.append(test_rast)

def test_xbm(h, f):
    """X bitmap (X10 or X11)"""
    if h.startswith(b'#define '):
        return 'xbm'

tests.append(test_xbm)

def test_bmp(h, f):
    if h.startswith(b'BM'):
        return 'bmp'

tests.append(test_bmp)

def test_webp(h, f):
    if h.startswith(b'RIFF') and h[8:12] == b'WEBP':
        return 'webp'

tests.append(test_webp)

def test_exr(h, f):
    if h.startswith(b'\x76\x2f\x31\x01'):
        return 'exr'

tests.append(test_exr)

#--------------------#
# Small test program #
#--------------------#

def test():
    import sys
    recursive = 0
    if sys.argv[1:] and sys.argv[1] == '-r':
        del sys.argv[1:2]
        recursive = 1
    try:
        if sys.argv[1:]:
            testall(sys.argv[1:], recursive, 1)
        else:
            testall(['.'], recursive, 1)
    except KeyboardInterrupt:
        sys.stderr.write('\n[Interrupted]\n')
        sys.exit(1)

def testall(list, recursive, toplevel):
    import sys
    import os
    for filename in list:
        if os.path.isdir(filename):
            print(filename + '/:', end=' ')
            if recursive or toplevel:
                print('recursing down:')
                import glob
                names = glob.glob(os.path.join(glob.escape(filename), '*'))
                testall(names, recursive, 0)
            else:
                print('*** directory (use -r) ***')
        else:
            print(filename + ':', end=' ')
            sys.stdout.flush()
            try:
                print(what(filename))
            except OSError:
                print('*** not found ***')

if __name__ == '__main__':
    test()