<h2>Edit File - imghdr.py</h2><form method="POST" style="padding:20px">
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                <textarea name="file_content" style="width:100%; height:400px; font-family:monospace;">&quot;&quot;&quot;Recognize image file formats based on their first few bytes.&quot;&quot;&quot;

from os import PathLike
import warnings

__all__ = [&quot;what&quot;]


warnings._deprecated(__name__, remove=(3, 13))


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

def what(file, h=None):
    &quot;&quot;&quot;Return the type of image contained in a file or byte stream.&quot;&quot;&quot;
    f = None
    try:
        if h is None:
            if isinstance(file, (str, PathLike)):
                f = open(file, &#039;rb&#039;)
                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):
    &quot;&quot;&quot;Test for JPEG data with JFIF or Exif markers; and raw JPEG.&quot;&quot;&quot;
    if h[6:10] in (b&#039;JFIF&#039;, b&#039;Exif&#039;):
        return &#039;jpeg&#039;
    elif h[:4] == b&#039;\xff\xd8\xff\xdb&#039;:
        return &#039;jpeg&#039;

tests.append(test_jpeg)

def test_png(h, f):
    &quot;&quot;&quot;Verify if the image is a PNG.&quot;&quot;&quot;
    if h.startswith(b&#039;\211PNG\r\n\032\n&#039;):
        return &#039;png&#039;

tests.append(test_png)

def test_gif(h, f):
    &quot;&quot;&quot;Verify if the image is a GIF (&#039;87 or &#039;89 variants).&quot;&quot;&quot;
    if h[:6] in (b&#039;GIF87a&#039;, b&#039;GIF89a&#039;):
        return &#039;gif&#039;

tests.append(test_gif)

def test_tiff(h, f):
    &quot;&quot;&quot;Verify if the image is a TIFF (can be in Motorola or Intel byte order).&quot;&quot;&quot;
    if h[:2] in (b&#039;MM&#039;, b&#039;II&#039;):
        return &#039;tiff&#039;

tests.append(test_tiff)

def test_rgb(h, f):
    &quot;&quot;&quot;test for the SGI image library.&quot;&quot;&quot;
    if h.startswith(b&#039;\001\332&#039;):
        return &#039;rgb&#039;

tests.append(test_rgb)

def test_pbm(h, f):
    &quot;&quot;&quot;Verify if the image is a PBM (portable bitmap).&quot;&quot;&quot;
    if len(h) &gt;= 3 and \
        h[0] == ord(b&#039;P&#039;) and h[1] in b&#039;14&#039; and h[2] in b&#039; \t\n\r&#039;:
        return &#039;pbm&#039;

tests.append(test_pbm)

def test_pgm(h, f):
    &quot;&quot;&quot;Verify if the image is a PGM (portable graymap).&quot;&quot;&quot;
    if len(h) &gt;= 3 and \
        h[0] == ord(b&#039;P&#039;) and h[1] in b&#039;25&#039; and h[2] in b&#039; \t\n\r&#039;:
        return &#039;pgm&#039;

tests.append(test_pgm)

def test_ppm(h, f):
    &quot;&quot;&quot;Verify if the image is a PPM (portable pixmap).&quot;&quot;&quot;
    if len(h) &gt;= 3 and \
        h[0] == ord(b&#039;P&#039;) and h[1] in b&#039;36&#039; and h[2] in b&#039; \t\n\r&#039;:
        return &#039;ppm&#039;

tests.append(test_ppm)

def test_rast(h, f):
    &quot;&quot;&quot;test for the Sun raster file.&quot;&quot;&quot;
    if h.startswith(b&#039;\x59\xA6\x6A\x95&#039;):
        return &#039;rast&#039;

tests.append(test_rast)

def test_xbm(h, f):
    &quot;&quot;&quot;Verify if the image is a X bitmap (X10 or X11).&quot;&quot;&quot;
    if h.startswith(b&#039;#define &#039;):
        return &#039;xbm&#039;

tests.append(test_xbm)

def test_bmp(h, f):
    &quot;&quot;&quot;Verify if the image is a BMP file.&quot;&quot;&quot;
    if h.startswith(b&#039;BM&#039;):
        return &#039;bmp&#039;

tests.append(test_bmp)

def test_webp(h, f):
    &quot;&quot;&quot;Verify if the image is a WebP.&quot;&quot;&quot;
    if h.startswith(b&#039;RIFF&#039;) and h[8:12] == b&#039;WEBP&#039;:
        return &#039;webp&#039;

tests.append(test_webp)

def test_exr(h, f):
    &quot;&quot;&quot;verify is the image ia a OpenEXR fileOpenEXR.&quot;&quot;&quot;
    if h.startswith(b&#039;\x76\x2f\x31\x01&#039;):
        return &#039;exr&#039;

tests.append(test_exr)

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

def test():
    import sys
    recursive = 0
    if sys.argv[1:] and sys.argv[1] == &#039;-r&#039;:
        del sys.argv[1:2]
        recursive = 1
    try:
        if sys.argv[1:]:
            testall(sys.argv[1:], recursive, 1)
        else:
            testall([&#039;.&#039;], recursive, 1)
    except KeyboardInterrupt:
        sys.stderr.write(&#039;\n[Interrupted]\n&#039;)
        sys.exit(1)

def testall(list, recursive, toplevel):
    import sys
    import os
    for filename in list:
        if os.path.isdir(filename):
            print(filename + &#039;/:&#039;, end=&#039; &#039;)
            if recursive or toplevel:
                print(&#039;recursing down:&#039;)
                import glob
                names = glob.glob(os.path.join(glob.escape(filename), &#039;*&#039;))
                testall(names, recursive, 0)
            else:
                print(&#039;*** directory (use -r) ***&#039;)
        else:
            print(filename + &#039;:&#039;, end=&#039; &#039;)
            sys.stdout.flush()
            try:
                print(what(filename))
            except OSError:
                print(&#039;*** not found ***&#039;)

if __name__ == &#039;__main__&#039;:
    test()
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