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Name	Size	Permission	Date
__pycache__	[ DIR ]	drwxr-xr-x	2025-08-15 19:31
asyncio	[ DIR ]	drwxr-xr-x	2025-08-15 19:31
collections	[ DIR ]	drwxr-xr-x	2025-08-15 19:31
concurrent	[ DIR ]	drwxr-xr-x	2025-08-15 19:31
config-3.6m	[ DIR ]	drwxr-xr-x	2025-08-15 19:32
ctypes	[ DIR ]	drwxr-xr-x	2025-08-15 19:31
curses	[ DIR ]	drwxr-xr-x	2025-08-15 19:31
dbm	[ DIR ]	drwxr-xr-x	2025-08-15 19:31
distutils	[ DIR ]	drwxr-xr-x	2025-08-15 19:31
email	[ DIR ]	drwxr-xr-x	2025-08-15 19:31
encodings	[ DIR ]	drwxr-xr-x	2025-08-15 19:31
ensurepip	[ DIR ]	drwxr-xr-x	2025-08-15 19:31
html	[ DIR ]	drwxr-xr-x	2025-08-15 19:31
http	[ DIR ]	drwxr-xr-x	2025-08-15 19:31
idlelib	[ DIR ]	drwxr-xr-x	2025-08-15 19:31
importlib	[ DIR ]	drwxr-xr-x	2025-08-15 19:31
json	[ DIR ]	drwxr-xr-x	2025-08-15 19:31
lib-dynload	[ DIR ]	drwxr-xr-x	2025-08-15 19:31
lib2to3	[ DIR ]	drwxr-xr-x	2025-08-15 19:31
logging	[ DIR ]	drwxr-xr-x	2025-08-15 19:31
multiprocessing	[ DIR ]	drwxr-xr-x	2025-08-15 19:31
pydoc_data	[ DIR ]	drwxr-xr-x	2025-08-15 19:31
site-packages	[ DIR ]	drwxr-xr-x	2025-08-15 19:31
sqlite3	[ DIR ]	drwxr-xr-x	2025-08-15 19:31
test	[ DIR ]	drwxr-xr-x	2025-08-15 19:31
unittest	[ DIR ]	drwxr-xr-x	2025-08-15 19:31
urllib	[ DIR ]	drwxr-xr-x	2025-08-15 19:31
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xmlrpc	[ DIR ]	drwxr-xr-x	2025-08-15 19:31
__future__.py	4.73 KB	-rw-r--r--	2024-04-17 17:32
__phello__.foo.py	64 B	-rw-r--r--	2024-04-17 17:32
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abc.py	8.52 KB	-rw-r--r--	2024-04-17 17:32
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antigravity.py	477 B	-rw-r--r--	2024-04-17 17:32
argparse.py	88.25 KB	-rw-r--r--	2024-04-17 17:32
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bdb.py	23 KB	-rw-r--r--	2024-04-17 17:32
binhex.py	13.63 KB	-rw-r--r--	2024-04-17 17:32
bisect.py	2.53 KB	-rw-r--r--	2024-04-17 17:32
bz2.py	12.19 KB	-rw-r--r--	2024-04-17 17:32
cProfile.py	5.26 KB	-rwxr-xr-x	2024-04-17 17:32
calendar.py	22.67 KB	-rw-r--r--	2024-04-17 17:32
cgi.py	36.21 KB	-rwxr-xr-x	2024-04-17 17:32
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chunk.py	5.3 KB	-rw-r--r--	2024-04-17 17:32
cmd.py	14.51 KB	-rw-r--r--	2024-04-17 17:32
code.py	10.37 KB	-rw-r--r--	2024-04-17 17:32
codecs.py	35.43 KB	-rw-r--r--	2024-04-17 17:32
codeop.py	5.85 KB	-rw-r--r--	2024-04-17 17:32
colorsys.py	3.97 KB	-rw-r--r--	2024-04-17 17:32
compileall.py	11.84 KB	-rw-r--r--	2024-04-17 17:32
configparser.py	52.34 KB	-rw-r--r--	2024-04-17 17:32
contextlib.py	12.85 KB	-rw-r--r--	2024-04-17 17:32
copy.py	8.61 KB	-rw-r--r--	2024-04-17 17:32
copyreg.py	6.84 KB	-rw-r--r--	2024-04-17 17:32
crypt.py	1.82 KB	-rw-r--r--	2024-04-17 17:32
csv.py	15.8 KB	-rw-r--r--	2024-04-17 17:32
datetime.py	80.11 KB	-rw-r--r--	2024-04-17 17:32
decimal.py	320 B	-rw-r--r--	2024-04-17 17:32
difflib.py	82.4 KB	-rw-r--r--	2024-04-17 17:32
dis.py	17.71 KB	-rw-r--r--	2024-04-17 17:32
doctest.py	101.94 KB	-rw-r--r--	2024-04-17 17:32
dummy_threading.py	2.75 KB	-rw-r--r--	2024-04-17 17:32
enum.py	32.82 KB	-rw-r--r--	2024-04-17 17:32
filecmp.py	9.6 KB	-rw-r--r--	2024-04-17 17:32
fileinput.py	14.13 KB	-rw-r--r--	2024-04-17 17:32
fnmatch.py	3.09 KB	-rw-r--r--	2024-04-17 17:32
formatter.py	14.79 KB	-rw-r--r--	2024-04-17 17:32
fractions.py	23.08 KB	-rw-r--r--	2024-04-17 17:32
ftplib.py	34.78 KB	-rw-r--r--	2024-04-17 17:32
functools.py	30.61 KB	-rw-r--r--	2024-04-17 17:32
genericpath.py	4.64 KB	-rw-r--r--	2024-04-17 17:32
getopt.py	7.31 KB	-rw-r--r--	2024-04-17 17:32
getpass.py	5.85 KB	-rw-r--r--	2024-04-17 17:32
gettext.py	21.03 KB	-rw-r--r--	2024-04-17 17:32
glob.py	5.51 KB	-rw-r--r--	2024-04-17 17:32
gzip.py	19.86 KB	-rw-r--r--	2024-04-17 17:32
hashlib.py	9.31 KB	-rw-r--r--	2024-04-17 17:32
heapq.py	22.39 KB	-rw-r--r--	2024-04-17 17:32
hmac.py	4.94 KB	-rw-r--r--	2024-04-17 17:32
imaplib.py	52.05 KB	-rw-r--r--	2024-04-17 17:32
imghdr.py	3.71 KB	-rw-r--r--	2024-04-17 17:32
imp.py	10.42 KB	-rw-r--r--	2024-04-17 17:32
inspect.py	114.22 KB	-rw-r--r--	2024-04-17 17:32
io.py	3.43 KB	-rw-r--r--	2024-04-17 17:32
ipaddress.py	72.82 KB	-rw-r--r--	2024-04-17 17:32
keyword.py	2.17 KB	-rwxr-xr-x	2024-04-17 17:32
linecache.py	5.19 KB	-rw-r--r--	2024-04-17 17:32
locale.py	75.49 KB	-rw-r--r--	2024-04-17 17:32
lzma.py	12.68 KB	-rw-r--r--	2024-04-17 17:32
macpath.py	5.83 KB	-rw-r--r--	2024-04-17 17:32
macurl2path.py	2.67 KB	-rw-r--r--	2024-04-17 17:32
mailbox.py	76.78 KB	-rw-r--r--	2024-04-17 17:32
mailcap.py	7.91 KB	-rw-r--r--	2024-04-17 17:32
mimetypes.py	20.55 KB	-rw-r--r--	2024-04-17 17:32
modulefinder.py	22.49 KB	-rw-r--r--	2024-04-17 17:32
netrc.py	5.55 KB	-rw-r--r--	2024-04-17 17:32
nntplib.py	42.07 KB	-rw-r--r--	2024-04-17 17:32
ntpath.py	22.55 KB	-rw-r--r--	2024-04-17 17:32
nturl2path.py	2.39 KB	-rw-r--r--	2024-04-17 17:32
numbers.py	10 KB	-rw-r--r--	2024-04-17 17:32
opcode.py	5.69 KB	-rw-r--r--	2024-04-17 17:32
operator.py	10.61 KB	-rw-r--r--	2024-04-17 17:32
optparse.py	58.96 KB	-rw-r--r--	2024-04-17 17:32
os.py	36.65 KB	-rw-r--r--	2024-04-17 17:32
pathlib.py	47.83 KB	-rw-r--r--	2024-04-17 17:32
pdb.py	59.89 KB	-rwxr-xr-x	2024-04-17 17:32
pickle.py	54.39 KB	-rw-r--r--	2024-04-17 17:32
pickletools.py	89.62 KB	-rw-r--r--	2024-04-17 17:32
pipes.py	8.71 KB	-rw-r--r--	2024-04-17 17:32
pkgutil.py	20.82 KB	-rw-r--r--	2024-04-17 17:32
platform.py	46.1 KB	-rwxr-xr-x	2024-04-17 17:32
plistlib.py	32.02 KB	-rw-r--r--	2024-04-17 17:32
poplib.py	14.61 KB	-rw-r--r--	2024-04-17 17:32
posixpath.py	15.4 KB	-rw-r--r--	2024-04-17 17:32
pprint.py	20.37 KB	-rw-r--r--	2024-04-17 17:32
profile.py	21.52 KB	-rwxr-xr-x	2024-04-17 17:32
pstats.py	25.94 KB	-rw-r--r--	2024-04-17 17:32
pty.py	4.65 KB	-rw-r--r--	2024-04-17 17:32
py_compile.py	7.01 KB	-rw-r--r--	2024-04-17 17:32
pyclbr.py	13.24 KB	-rw-r--r--	2024-04-17 17:32
pydoc.py	101.08 KB	-rw-r--r--	2024-04-17 17:32
queue.py	8.57 KB	-rw-r--r--	2024-04-17 17:32
quopri.py	7.09 KB	-rwxr-xr-x	2024-04-17 17:32
random.py	26.8 KB	-rw-r--r--	2024-04-17 17:32
re.py	15.19 KB	-rw-r--r--	2024-04-17 17:32
reprlib.py	5.21 KB	-rw-r--r--	2024-04-17 17:32
rlcompleter.py	6.93 KB	-rw-r--r--	2024-04-17 17:32
runpy.py	11.68 KB	-rw-r--r--	2024-04-17 17:32
sched.py	6.36 KB	-rw-r--r--	2024-04-17 17:32
secrets.py	1.99 KB	-rw-r--r--	2024-04-17 17:32
selectors.py	18.98 KB	-rw-r--r--	2024-04-17 17:32
shelve.py	8.32 KB	-rw-r--r--	2024-04-17 17:32
shlex.py	12.65 KB	-rw-r--r--	2024-04-17 17:32
shutil.py	39.59 KB	-rw-r--r--	2024-04-17 17:32
signal.py	2.07 KB	-rw-r--r--	2024-04-17 17:32
site.py	20.53 KB	-rw-r--r--	2024-04-17 17:32
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smtplib.py	43.38 KB	-rwxr-xr-x	2024-04-17 17:32
sndhdr.py	6.92 KB	-rw-r--r--	2024-04-17 17:32
socket.py	26.8 KB	-rw-r--r--	2024-04-17 17:32
socketserver.py	26.38 KB	-rw-r--r--	2024-04-17 17:32
sre_compile.py	18.88 KB	-rw-r--r--	2024-04-17 17:32
sre_constants.py	6.66 KB	-rw-r--r--	2024-04-17 17:32
sre_parse.py	35.68 KB	-rw-r--r--	2024-04-17 17:32
ssl.py	43.74 KB	-rw-r--r--	2024-04-17 17:32
stat.py	4.92 KB	-rw-r--r--	2024-04-17 17:32
statistics.py	20.19 KB	-rw-r--r--	2024-04-17 17:32
string.py	11.52 KB	-rw-r--r--	2024-04-17 17:32
stringprep.py	12.61 KB	-rw-r--r--	2024-04-17 17:32
struct.py	257 B	-rw-r--r--	2024-04-17 17:32
subprocess.py	60.88 KB	-rw-r--r--	2024-04-17 17:32
sunau.py	17.67 KB	-rw-r--r--	2024-04-17 17:32
symbol.py	2.07 KB	-rwxr-xr-x	2024-04-17 17:32
symtable.py	7.11 KB	-rw-r--r--	2024-04-17 17:32
sysconfig.py	24.4 KB	-rw-r--r--	2024-04-17 17:32
tabnanny.py	11.15 KB	-rwxr-xr-x	2024-04-17 17:32
tarfile.py	91.13 KB	-rwxr-xr-x	2024-04-17 17:32
telnetlib.py	22.59 KB	-rw-r--r--	2024-04-17 17:32
tempfile.py	26.15 KB	-rw-r--r--	2024-04-17 17:32
textwrap.py	19.1 KB	-rw-r--r--	2024-04-17 17:32
this.py	1003 B	-rw-r--r--	2024-04-17 17:32
threading.py	47.88 KB	-rw-r--r--	2024-04-17 17:32
timeit.py	13.03 KB	-rwxr-xr-x	2024-04-17 17:32
token.py	3 KB	-rw-r--r--	2024-04-17 17:32
tokenize.py	28.8 KB	-rw-r--r--	2024-04-17 17:32
trace.py	28.06 KB	-rwxr-xr-x	2024-04-17 17:32
traceback.py	22.91 KB	-rw-r--r--	2024-04-17 17:32
tracemalloc.py	16.27 KB	-rw-r--r--	2024-04-17 17:32
tty.py	879 B	-rw-r--r--	2024-04-17 17:32
types.py	8.66 KB	-rw-r--r--	2024-04-17 17:32
typing.py	78.39 KB	-rw-r--r--	2024-04-17 17:32
uu.py	6.75 KB	-rwxr-xr-x	2024-04-17 17:32
uuid.py	23.41 KB	-rw-r--r--	2024-04-17 17:32
warnings.py	18.05 KB	-rw-r--r--	2024-04-17 17:32
wave.py	17.29 KB	-rw-r--r--	2024-04-17 17:32
weakref.py	19.99 KB	-rw-r--r--	2024-04-17 17:32
webbrowser.py	21.26 KB	-rwxr-xr-x	2024-04-17 17:32
xdrlib.py	5.77 KB	-rw-r--r--	2024-04-17 17:32
zipapp.py	6.99 KB	-rw-r--r--	2024-04-17 17:32
zipfile.py	74.49 KB	-rw-r--r--	2024-04-17 17:32

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(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()