Files
csv-loader-generics-present…/lib/generics_4_with_generics.py
2023-02-17 09:43:33 +01:00

41 lines
929 B
Python

from dataclasses import dataclass
from typing import List, Optional, TypeVar
@dataclass
class UserBase:
id: int
first_name: str
last_name: str
@dataclass
class Employee(UserBase):
department: str
@dataclass
class Partner(UserBase):
company: str
UserContainerType = TypeVar("UserContainerType", bound=UserBase)
class UserContainer(List[UserContainerType]):
def get_user_by_id(self, id: int) -> Optional[UserContainerType]:
for user in self:
if user.id == id:
return user
return None
class EmployeeContainer(UserContainer[Employee]):
def get_by_department(self, department: str) -> List[Employee]:
return [user for user in self if user.department == department]
class PartnerContainer(UserContainer[Partner]):
def get_by_company(self, company: str) -> List[Partner]:
return [user for user in self if user.company == company]