http://stackoverflow.com/questions/10480806/compare-dictionaries-ignoring-specific-keys

gistfile1.txt

def equal_dicts_1(a, b, ignore_keys):
    ka = set(a).difference(ignore_keys)
    kb = set(b).difference(ignore_keys)
    return ka == kb and all(a[k] == b[k] for k in ka)

def equal_dicts_2(d1, d2, ignore_keys):
    d1_filtered = dict((k, v) for k,v in d1.iteritems() if k not in ignore_keys)
    d2_filtered = dict((k, v) for k,v in d2.iteritems() if k not in ignore_keys)
    return d1_filtered == d2_filtered

def equal_dicts_3(d1, d2, ignore_keys):
    ignored = set(ignore_keys)
    for k1, v1 in d1.iteritems():
        if k1 not in ignored and (k1 not in d2 or d2[k1] != v1):
            return False
    for k2, v2 in d2.iteritems():
        if k2 not in ignored and k2 not in d1:
            return False
    return True

def equal_dicts_4(d1, d2, ignore_keys):
    ignore = set(ignore_keys)
    for k in d1:
        if k in ignore_keys:
            continue
        try:
            if d1[k] != d2[k]:
                return False
        except KeyError:
            return False

    for k in d2:
        if k in ignore_keys:
            continue
        try:
            if d1[k] != d2[k]:
                return False
        except KeyError:
            return False
    return True

def equal_dicts_5(d1, d2, ignore_keys):
    return {k: v for k,v in d1.iteritems() if k not in ignore_keys} == {k: v for k,v in d2.iteritems() if k not in ignore_keys}


setup = """
a = {chr(c):c for c in range(255)}
b = {chr(c):c for c in range(255)}
"""

import timeit

results = []
for k, v in locals().items():
    if callable(v):
        imp = 'from __main__ import ' + k + '\n'
        t = timeit.timeit(k + '(a,b,["foo"])', imp + setup, number=1000)
        results.append((t, k))

for p in sorted(results):
    print '%.4f %s' % p


#0.0897 equal_dicts_1
#0.1225 equal_dicts_5
#0.1309 equal_dicts_4
#0.1489 equal_dicts_3
#0.1689 equal_dicts_2