identify_pic_type.py

filepath = r'\\path\to\file\may\not\be\a\PNG.png'
filepath.replace('\\', '/')
f = open(filepath, mode='b')
b = f.read(8)
for _ in b:
	print (_)
	print (hex(_))
	
	#Notice the first two hex values are 42 and 4d; 
	#Consistent with BMP filetype (despite the extension), 
	#As shown here: http://yazeem.wordpress.com/2009/10/25/determine-image-file-type-using-its-header/