Python code to find the fields of an object

sample_use_dir.py

from dataclasses import dataclass, field


def get_member(cls) -> list[str]:
    return [x for x in dir(cls) if not x.startswith("_")]


@dataclass
class Product:
    # If you do not specify a field, that field will not be detected.
    id: str
    name: str = field(default=None)
    type: str = field(default="A01")
    description: str = field(default="")


p1 = Product(
    id="id01",
    name="Product 1",
    type="B01",
    description="xxx"
)

get_member(Product)
# ['description', 'name', 'type']

get_member(p1)
# ['description', 'id', 'name', 'type']

sample_use_inspect.py

from dataclasses import dataclass, field
import inspect


def get_member(cls) -> list[str]:
    return [x for x in inspect.getmembers(cls) if not x[0].startswith("_")]


@dataclass
class Product:
    # If you do not specify a field, that field will not be detected.
    id: str
    name: str = field(default=None)
    type: str = field(default="A01")
    description: str = field(default="")


p1 = Product(
    id="id01",
    name="Product 1",
    type="B01",
    description="xxx"
)

get_member(Product)
# [('description', ''), ('name', None), ('type', 'A01')]

get_member(p1)
# [('description', 'xxx'), ('id', 'id01'), ('name', 'Product 1'), ('type', 'B01')]