Find bytes in binary files

main.py

with open('test.mp3','rb') as file:
	data = file.read()

start_png = data.find(bytes.fromhex('89 50 4E 47 0D 0A 1A 0A'))
end_png = data.find(bytes.fromhex('49 45 4E 44 AE 42 60 82'))+8
with open('test.png','wb') as f:
	f.write(data[start_png:end_png])
print(start_png)
print(end_png)