Picture Contrast

from the PIL Import Image 
Import Math 
Import operator 
the reduce from functools Import 
DEF Compare (pic1, pic2): 
    '' ' 
    : param pic1: Image 1 Path 
    : pic2 param: Image 2 Path 
    : return: return results of the comparison 
    ' '' 
    image1 = Image .Open (pic1) 
    image2 = Image.open (pic2) 

    histogram1 = image1.histogram () 
    histogram2 = image2.histogram () 

    Differ = Math.sqrt (the reduce (operator.add, List (Map (the lambda A, B: (ab & ) ** 2, histogram1, histogram2))) / len (histogram1)) 

    Print (Differ) 
    return Differ 

Compare ( 'D: /1.png', 'D: /1.png')