Sometimes it really surprises me how something as mundane as JSON encoding and decoding `datetime` objects in Python is not readily solve-able with a simple google query. I guess this is caused by the sheer amount of code fragments floating around confusing The Kraken. With this blag post, I'd happily like to add to this mess:
<span id="more-5355"></span>
```python
#!/usr/bin/env python3
# -*- coding: utf-8 -*-
import json
import datetime
class CustomEncoder(json.JSONEncoder):
def default(self, obj):
if isinstance(obj, (datetime.date, datetime.datetime)):
return obj.isoformat()
class CustomDecoder(json.JSONDecoder):
def __init__(self, *args, **kwargs):
super().__init__(object_hook=self.try_datetime, *args, **kwargs)
@staticmethod
def try_datetime(d):
ret = {}
for key, value in d.items():
try:
ret[key] = datetime.datetime.fromisoformat(value)
except (ValueError, TypeError):
ret[key] = value
return ret
json_str = json.dumps({'foo': datetime.datetime.now()}, cls=CustomEncoder)
d = json.loads(json_str, cls=CustomDecoder)
print(type(d['foo']))
# <class 'datetime.datetime'>
```
That's it. Have a good one. Bye.