On 2020-07-06 2:06 PM, Jon Ribbens via Python-list wrote:
On 2020-07-06, Chris Angelico <ros...@gmail.com> wrote:
On Mon, Jul 6, 2020 at 8:36 PM Adam Funk <a24...@ducksburg.com> wrote:
Is there a "bulletproof" version of json.dump somewhere that will
convert bytes to str, any other iterables to list, etc., so you can
just get your data into a file & keep working?
That's the PHP definition of "bulletproof" - whatever happens, no
matter how bad, just keep right on going.
While I agree entirely with your point, there is however perhaps room
for a bit more helpfulness from the json module. There is no sensible
reason I can think of that it refuses to serialize sets, for example.
Going a bit further and, for example, automatically calling isoformat()
on date/time/datetime objects would perhaps be a bit more controversial,
but would frequently be useful, and there's no obvious downside that
occurs to me.
I may be missing something, but that would cause a downside for me.
I store Python lists and dicts in a database by calling dumps() when
saving them to the database and loads() when retrieving them.
If a date was 'dumped' using isoformat(), then on retrieval I would not
know whether it was originally a string, which must remain as is, or was
originally a date object, which must be converted back to a date object.
There is no perfect answer, but my solution works fairly well. When
dumping, I use 'default=repr'. This means that dates get dumped as
'datetime.date(2020, 7, 6)'. I look for that pattern on retrieval to
detect that it is actually a date object.
I use the same trick for Decimal objects.
Maybe the OP could do something similar.
Frank Millman
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