1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
|
"""
JSON Helper Utilities - *only* internally used in ``errors.py``,
i.e. for rendering exceptions.
.. NOTE::
This module should not be imported anywhere at the *top-level*
of another library module!
"""
__all__ = [
'safe_dumps',
]
from dataclasses import is_dataclass
from datetime import datetime, time, date
from enum import Enum
from json import dumps, JSONEncoder
from typing import Any
from uuid import UUID
from ..loader_selection import asdict
class SafeEncoder(JSONEncoder):
"""
A Customized JSON Encoder, which copies core logic in the
`dumpers` module to support serialization of more complex
Python types, such as `datetime` and `Enum`.
"""
def default(self, o: Any) -> Any:
"""Default function, copies the core (minimal) logic from `dumpers.py`."""
if is_dataclass(o):
return asdict(o)
if isinstance(o, Enum):
return o.value
if isinstance(o, UUID):
return o.hex
if isinstance(o, (datetime, time)):
return o.isoformat().replace('+00:00', 'Z', 1)
if isinstance(o, date):
return o.isoformat()
# anything else (Decimal, timedelta, etc.)
return str(o)
def safe_dumps(o, cls=SafeEncoder, **kwargs):
try:
return dumps(o, cls=cls, **kwargs)
except TypeError:
return o
|
