python 小程序 比较目录间的差异

import sys, os


def difference(seq1, seq2):
    """
    返回仅在seq1中的项
    """
    return [item for item in seq1 if item not in seq2]

def reportdiff(unique1, unique2, dir1, dir2):
    if not (unique1 or unique2):
        print("dir lists are identical")
    else:
        if unique1:
            print("file unique to", dir1)
            for item in unique1:
                print(‘...‘, item)
        if unique2:
            print("file unique to", dir2)
            for item in unique2:
                print("...", item)



def compareDirs(dir1, dir2):
    print("comparing {0} to {1}".format(dir1, dir2))
    if not (os.path.isdir(dir1) and os.path.isdir(dir2)):
        return
    else:
        files1 = os.listdir(dir1)
        files2 = os.listdir(dir2)
        unique1 = difference(files1, files2)
        unique2 = difference(files2, files1)
        reportdiff(unique1, unique2, dir1, dir2)


if __name__ == ‘__main__‘:
    compareDirs(‘../testdir‘, ‘../testdir1‘)