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tests = {
'webp': lambda h: h[0:4] == b'RIFF' and h[8:] == b'WEBP',
'png': lambda h: h[:8] == b'\211PNG\r\n\032\n',
'jpeg': lambda h: h[6:10] in (b'JFIF', b'Exif'),
}
def what(path):
"""Detect format of image (Currently supports jpeg, png, webp only)
Ref: https://github.com/python/cpython/blob/3.10/Lib/imghdr.py
"""
with open(path, 'rb') as f:
head = f.read(12)
return next((type_ for type_, test in tests.items() if test(head)), None)
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