from __future__ import print_function

import os

try:
    import cPickle as pickle
except ImportError:
    import pickle


class Thing:
    def __init__(self, s):
        self.s = s

    def __repr__(self):
        return 'Thing: %s' % self.s

    def save(self, filename):
        '''Save thing to a file.'''
        with open(filename, 'wb') as f:
            pickle.dump(self, f)

    @staticmethod
    def load(filename):
        ''' Return a thing loaded from file.'''
        with open(filename, 'rb') as f:
            obj = pickle.load(f)
        return obj

    def split_into_tokens(message):
        pass

    def split_into_lemmas(message):
        pass

SAVE_FILE = 'thing.pkl'

if __name__ == '__main__':
    if os.path.isfile(SAVE_FILE):
        t = Thing.load(SAVE_FILE)
        print('Loaded thing from disk:', SAVE_FILE)

    else:
        t = Thing('foo')
        t.save('thing.pkl')
        print('Saved thing to disk:', SAVE_FILE)

    print(t)