This page is a start at some Python and JSON issues.

For more information on Python and JSON, see Python JSON input . Not all Python features convert to/from JSON. If you get an error on reading or writing JSON, you may have to research it and make some changes to your system (as used by Python). The following do not convert well (or at all). (This list is not complete, just what I have encountered).

• sets
• JSON keys need to be strings (not integers, tuples, etc.)
• certain tuples (as in keys), otherwise written as lists and then read as lists (not tuples)

If I know that I am going to/from JSON, I try to avoid those issues by not using that approach. Usually one goes through the Python JSON library, but if not, Python allows a comma as a terminator (at the end of a list, dictionary, etc.) but JSON does not.

This is important if you are programmatically generating JSON and not using the Python JSON library.