2
I would encourage you to look into pickle field for object serialization in Python where the data is converted to a bytestream and stored.
The pickle module implements a fundamental, but powerful algorithm for serializing and de-serializing a Python object structure. “Pickling” is the process whereby a Python object hierarchy is converted into a byte stream, and “unpickling” is the inverse operation, whereby a byte stream is converted back into an object hierarchy. Pickling (and unpickling) is alternatively known as “serialization”, “marshalling,” 1 or “flattening”, however, to avoid confusion, the terms used here are “pickling” and “unpickling”.
To retrieve data, you would be “unpickling”.
There is also a django app called django-picklefield which is widely used.
The downside of your approach is, you have to take into consideration so many aspects. Also, use of eval is not recommended for security, etc..
