golden hour

/opt/alt/python37/lib64/python3.7

File/Folder	Size	Actions
__future__.py	4.98 KB
__phello__.foo.py	64 B
__pycache__	-
_bootlocale.py	1.76 KB
_collections_abc.py	25.8 KB
_compat_pickle.py	8.54 KB
_compression.py	5.21 KB
_dummy_thread.py	5.89 KB
_markupbase.py	14.26 KB
_osx_support.py	19.14 KB
_py_abc.py	6.04 KB
_pydecimal.py	223.33 KB
_pyio.py	89.47 KB
_sitebuiltins.py	3.04 KB
_strptime.py	24.91 KB
_sysconfigdata_dm_linux_x86_64-linux-gnu.py	26.36 KB
_sysconfigdata_m_linux_x86_64-linux-gnu.py	25 KB
_threading_local.py	7.04 KB
_weakrefset.py	5.55 KB
abc.py	5.45 KB
aifc.py	32.04 KB
antigravity.py	477 B
argparse.py	93.14 KB
ast.py	12.54 KB
asynchat.py	11.06 KB
asyncio	-
asyncore.py	19.65 KB
base64.py	19.92 KB
bdb.py	30.99 KB
binhex.py	13.63 KB
bisect.py	2.5 KB
bz2.py	12.12 KB
cProfile.py	6.11 KB
calendar.py	24.24 KB
cgi.py	34.23 KB
cgitb.py	11.74 KB
chunk.py	5.31 KB
cmd.py	14.51 KB
code.py	10.37 KB
codecs.py	35.76 KB
codeop.py	6.13 KB
collections	-
colorsys.py	3.97 KB
compileall.py	13.46 KB
concurrent	-
config-3.7m	-
configparser.py	53.01 KB
contextlib.py	24.18 KB
contextvars.py	129 B
copy.py	8.65 KB
copyreg.py	6.85 KB
crypt.py	3.27 KB
csv.py	15.8 KB
ctypes	-
curses	-
dataclasses.py	48.36 KB
datetime.py	84.52 KB
dbm	-
decimal.py	320 B
difflib.py	82.42 KB
dis.py	19.42 KB
distutils	-
doctest.py	102.11 KB
dummy_threading.py	2.75 KB
email	-
encodings	-
ensurepip	-
enum.py	34.22 KB
filecmp.py	9.6 KB
fileinput.py	14.28 KB
fnmatch.py	3.96 KB
formatter.py	14.79 KB
fractions.py	23.2 KB
ftplib.py	34.78 KB
functools.py	32.16 KB
genericpath.py	4.8 KB
getopt.py	7.31 KB
getpass.py	5.85 KB
gettext.py	21.45 KB
glob.py	5.51 KB
gzip.py	20.15 KB
hashlib.py	9.31 KB
heapq.py	22.48 KB
hmac.py	6.36 KB
html	-
http	-
idlelib	-
imaplib.py	52.04 KB
imghdr.py	3.71 KB
imp.py	10.29 KB
importlib	-
inspect.py	114.88 KB
io.py	3.43 KB
ipaddress.py	71.85 KB
json	-
keyword.py	2.2 KB
lib-dynload	-
lib2to3	-
linecache.py	5.21 KB
locale.py	76.36 KB
logging	-
lzma.py	12.68 KB
macpath.py	5.98 KB
mailbox.py	76.81 KB
mailcap.py	8.85 KB
mimetypes.py	20.99 KB
modulefinder.py	22.5 KB
multiprocessing	-
netrc.py	5.44 KB
nntplib.py	42.08 KB
ntpath.py	21.82 KB
nturl2path.py	2.52 KB
numbers.py	10 KB
opcode.py	5.69 KB
operator.py	10.61 KB
optparse.py	58.96 KB
os.py	37.01 KB
pathlib.py	49.15 KB
pdb.py	61.04 KB
pickle.py	56.63 KB
pickletools.py	89.08 KB
pipes.py	8.71 KB
pkgutil.py	20.96 KB
platform.py	45.89 KB
plistlib.py	29.99 KB
poplib.py	14.61 KB
posixpath.py	15.4 KB
pprint.py	20.39 KB
profile.py	21.97 KB
pstats.py	26.67 KB
pty.py	4.65 KB
py_compile.py	7.81 KB
pyclbr.py	14.78 KB
pydoc.py	103.39 KB
pydoc_data	-
queue.py	11.09 KB
quopri.py	7.09 KB
random.py	26.91 KB
re.py	14.95 KB
reprlib.py	5.14 KB
rlcompleter.py	6.93 KB
runpy.py	11.68 KB
sched.py	6.29 KB
secrets.py	1.99 KB
selectors.py	18.13 KB
shelve.py	8.33 KB
shlex.py	12.79 KB
shutil.py	40.97 KB
signal.py	2.07 KB
site-packages	-
site.py	21.07 KB
smtpd.py	33.91 KB
smtplib.py	43.4 KB
sndhdr.py	6.92 KB
socket.py	26.83 KB
socketserver.py	26.29 KB
sqlite3	-
sre_compile.py	26.24 KB
sre_constants.py	7.01 KB
sre_parse.py	38.24 KB
ssl.py	44.43 KB
stat.py	5.26 KB
statistics.py	20.17 KB
string.py	11.29 KB
stringprep.py	12.61 KB
struct.py	257 B
subprocess.py	70.95 KB
sunau.py	17.94 KB
symbol.py	2.09 KB
symtable.py	7.11 KB
sysconfig.py	23.87 KB
tabnanny.py	11.15 KB
tarfile.py	90.5 KB
telnetlib.py	22.59 KB
tempfile.py	26.1 KB
test	-
textwrap.py	18.95 KB
this.py	1003 B
threading.py	48.13 KB
timeit.py	13.18 KB
token.py	3.67 KB
tokenize.py	26.4 KB
trace.py	28.23 KB
traceback.py	22.89 KB
tracemalloc.py	16.68 KB
tty.py	879 B
types.py	9.67 KB
typing.py	55.12 KB
unittest	-
urllib	-
uu.py	7.11 KB
uuid.py	28.83 KB
venv	-
warnings.py	19.61 KB
wave.py	17.8 KB
weakref.py	21 KB
webbrowser.py	23.16 KB
wsgiref	-
xdrlib.py	5.77 KB
xml	-
xmlrpc	-
zipapp.py	7.36 KB
zipfile.py	79.19 KB

Edit: imghdr.py

"""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()