heshhe

def search(keyword):
    for key, value in dict_oid.items():
        for item in value[0]:
            if item == keyword:
                return key, value[0][item]

    return None, None

header1, header2 = search('1.3.6.1.5.5.7.3.2')
print('{}, {}'.format(header1, header2))