is_picklable(obj)

gistfile1.py

import cPickle as pickle


def pickle_recursively(obj, depth=0):
    pad = ' ' * depth
    if isinstance(obj, dict):
        print pad, 'dict', obj.__class__
        for k, v in obj.iteritems():
            print pad, k
            pickle_recursively(v, depth + 1)
    elif isinstance(obj, list):
        print pad, 'list', obj.__class__
        for v in obj:
            pickle_recursively(v, depth + 1)
    elif isinstance(obj, (str, unicode)):
        print pad, obj
        pickle.dumps(obj)
    else:
        print pad, obj
        pickle.dumps(obj)


def is_picklable(obj, debug=False):
    if debug:
        pickle_recursively(obj)
    pickle.dumps(obj)
    return True