compare dictionaries content

hashes.py

from hashlib import md5
from cPickle import dumps


def make_hashes(data):
    ret = [md5(dumps(data)).hexdigest()]
    ret.extend([
        md5(dumps(v)).hexdigest() for v in data.values()
    ])

    return ret


def check_hashes(data, last_data):
    new = []
    last_data = last_data.split(',')
    if last_data[0] != md5(dumps(data)).hexdigest():
        for i in data:
            if md5(dumps(data[i])).hexdigest() not in last_data[1:]:
                new.append(i)
        if len(new) > 0:
            return False, new

    return True, new

# d = {
#     1: {'tmp1': 1, 'tmp2': 2},
#     2: {'tmp1': 3, 'tmp2': 4},
#     3: {'tmp1': 5, 'tmp2': 7}
# }
# src_string = ','.join(make_hashes(d))
# or from db
src_string = '995a56cae0ad5ce853f0e1825e921ce0,2c0d7ba176ff1364a6ba87329dabd216,baf2d71dba6ac10eb341e36d6d8bb9c7,010290979ec01aefd6778724d6a75d5b'

d2 = {
    1: {'tmp1': 1, 'tmp2': 2},
    2: {'tmp1': 3, 'tmp2': 4},
    3: {'tmp1': 5, 'tmp2': 7}
}

same, new = check_hashes(d2, src_string)

print src_string
if same:
    print 'same'
else:
    print 'different:'
    for i in new:
        print d2[i]
    print ','.join(make_hashes(d2))