Protocol Etching 2: Python3-> 2 Data

Question

I am trying to transfer data from a dataset created in Python3.2, sort it, and then open in Python2.7. However, there is some data that Python2.7 objects to, although it works fine on the data sample, and I was wondering how to understand what is going wrong.

So in Python3.2:

import pickle with open('c:\\test.pickle', mode='wb') as f: pickle.dump(t_array, f, 2) 

Then when reading in Python2.7:

 import pickle f = open('c:\\test.pickle', mode='rb') t_data = pickle.load(f) 

Error:

 File "C:\Python27\lib\pickle.py", line 1378, in load return Unpickler(file).load() File "C:\Python27\lib\pickle.py", line 858, in load dispatch[key](self) File "C:\Python27\lib\pickle.py", line 1217, in load_build setstate(state) TypeError: must be char, not unicode 

The data is an array of dicts, nested no more than two deep, for example:

 {'key3': '3', 'key2': 1.1, 'key1': 1, 'dict': {'dkey2': 2, 'dkey1': 1}} 

What is (possibly) going wrong here? Is there an easy way to see what is causing the problem in the original (large) dataset?

Answer 1

The brine is not as good as it may look. Security vulnerabilities and many problems like these.

It is best to create your own save format, for example using json.