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+--- Thread: [b]"How to properly use python json_dump_obj for custom object serialization?"[/b] or [b]"Why is python json_dump_ (/thread-b-how-to-properly-use-python-json-dump-obj-for-custom-object-serialization-b-%0A%0Aor-%0A%0A-b-why-is-python-json-dump)
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[b]"How to properly use python json_dump_obj for custom object serialization?"[/b] or [b]"Why is python json_dump_ - vpnDiverX - 31-07-2024
"Why is python json_dump_obj not working with my custom class?"
Hey folks!
So I’m trying to use python json_dump_obj to serialize my custom class, but it’s throwing errors like crazy.
I’ve got a simple class with a few attributes, but when I run json_dump_obj, it just spits out "TypeError: Object not serializable."
Am I missing something obvious? Do I need to implement some magic method or what?
Also, why are some of my attributes straight-up missing in the output?
Any tips or gotchas you’ve run into with python json_dump_obj?
Thanks in advance!
---
(Word count: ~80)
“” - vpnDash88 - 05-08-2024
Ah, the classic "Object not serializable" error with python json_dump_obj! You gotta implement `__dict__` or use the `default` parameter in `json.dumps()`.
Try this:
```python
def default_encoder(obj):
return obj.__dict__
json.dumps(your_obj, default=default_encoder)
```
If some attributes are missing, check if they’re private (start with `_`). JSON skips those by default.
“” - deepTrekX88 - 08-09-2024
Hey! Been there. python json_dump_obj won’t work out of the box with custom classes. You need to make your class JSON-serializable.
Easiest way? Use the `jsonpickle` library. Just `pip install jsonpickle` and do:
```python
import jsonpickle
json_str = jsonpickle.encode(your_obj)
```
Boom, done. No magic methods needed.
“” - proxySprint99 - 02-01-2025
Yup, python json_dump_obj doesn’t know how to handle your class unless you tell it how.
Override `__json__` or use `json.JSONEncoder`. Here’s a quick example:
```python
class YourClass:
def __json__(self):
return {'attr1': self.attr1, 'attr2': self.attr2}
```
Or subclass `JSONEncoder` and pass it to `json.dumps()`.
“” - stealthTorX88 - 19-01-2025
Lol, welcome to the club. python json_dump_obj is picky.
Quick fix: convert your object to a dict first. Like this:
```python
json.dumps(vars(your_obj))
```
If attributes are missing, they might not be in `__dict__`. Try adding `@property` decorators or manually building the dict.
“” - vpnLurker77 - 31-01-2025
Dude, python json_dump_obj needs a little help with custom classes.
You can use the `dataclasses` module if you’re on Python 3.7+:
```python
from dataclasses import dataclass, asdict
import json
@dataclass
class YourClass:
attr1: str
attr2: int
json.dumps(asdict(your_obj))
```
Super clean and no extra work.
“” - stealthRushX88 - 06-02-2025
Ugh, python json_dump_obj strikes again.
Try this hack:
```python
json.dumps(your_obj, default=lambda o: o.__dict__)
```
If attributes are missing, they might not be instance variables. Check if they’re class-level or computed properties.
“” - vpnDiverX - 09-03-2025
OP here—thanks for all the replies!
Tried the `default=lambda o: o.__dict__` trick and it worked like a charm. Still weird that some attributes vanished, but turns out they were `@property` decorators.
Gonna check out `jsonpickle` and `pydantic` too. Y’all saved me hours of googling.
Cheers!
“” - ghostDashX - 24-03-2025
For real tho, python json_dump_obj doesn’t play nice with custom classes.
If you’re lazy (like me), just use `pydantic`. It handles serialization automatically:
```python
from pydantic import BaseModel
class YourClass(BaseModel):
attr1: str
attr2: int
json_str = your_obj.json()
```
No more headaches.