用值初始化 pydantic List

Question

我的代码如下所示。但是我不知道如何将 prescibeddrug obejct 插入购物车 class，即 List[PrescribedDrug]。我评论了一些错误的结果。

from pydantic import BaseModel
from typing import List
from typing import Optional


class PrescribedDrug(BaseModel):
    ean: str
    repayment: str

Cart = List[PrescribedDrug]



drug1 = PrescribedDrug.parse_obj({
    "ean": "5055565722000",
    "repayment": ""
  })
drug2 = PrescribedDrug.parse_obj({
    "ean": "5055565722001",
    "repayment": ""
  })

print(f'type of drug1: {type(drug1)}')

#Cart1 = Cart.__add__(drug1)
#raise AttributeError(attr)
#AttributeError: __add__
#print(Cart1)

#Cart1 = Cart
#Cart1.__add__(drug1)
#print(Cart1)
#raise AttributeError(attr)
#AttributeError: __add__

# Cart1 = Cart
# Cart1.__iadd__([drug1])
# raise AttributeError(attr)
# AttributeError: __iadd__

Answer 1

Cart = List[PrescribedDrug] 是类型，不是列表。

from pydantic import BaseModel
from typing import List

class PrescribedDrug(BaseModel):
    ean: str
    repayment: str

Cart = List[PrescribedDrug]

drug1 = PrescribedDrug.parse_obj(
    {
        "ean": "5055565722000",
        "repayment": "",
    }
)
drug2 = PrescribedDrug.parse_obj(
    {
        "ean": "5055565722001",
        "repayment": "",
    }
)

cart: Cart = []

print(f"type of drug1: {type(drug1)}")

cart.append(drug1)
cart.append(drug2)
print(cart)

打印

type of drug1: <class '__main__.PrescribedDrug'>
[PrescribedDrug(ean='5055565722000', repayment=''), PrescribedDrug(ean='5055565722001', repayment='')]

用值初始化 pydantic List

Inicializing pydantic List with values

python

class

list

pydantic