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260
formula10/frontend/template_model.py
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260
formula10/frontend/template_model.py
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from typing import List, Callable, Dict, overload
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from sqlalchemy import desc
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from formula10.database.model.driver import Driver
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from formula10.database.model.race import Race
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from formula10.database.model.race_guess import RaceGuess
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from formula10.database.model.race_result import RaceResult
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from formula10.database.model.season_guess import SeasonGuess
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from formula10.database.model.team import Team
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from formula10.database.model.user import User
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from formula10.database.validation_util import find_first_or_none, find_multiple, find_single, find_single_or_none
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from formula10 import db
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# This could also be moved to database_utils (at least partially), but I though the template should cache the database responses
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class TemplateModel:
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"""
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This class bundles all data required from inside a template.
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"""
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_all_users: List[User] | None = None
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_all_race_results: List[RaceResult] | None = None
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_all_race_guesses: List[RaceGuess] | None = None
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_all_season_guesses: List[SeasonGuess] | None = None
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_all_races: List[Race] | None = None
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_all_drivers: List[Driver] | None = None
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_all_teams: List[Team] | None = None
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def all_users(self) -> List[User]:
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"""
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Returns a list of all users in the database.
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"""
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if self._all_users is None:
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self._all_users = db.session.query(User).all()
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return self._all_users
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@overload
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def user_by(self, *, user_name: str) -> User:
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"""
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Tries to obtain the user object for a specific username.
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"""
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return self.user_by(user_name=user_name)
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@overload
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def user_by(self, *, user_name: str, ignore: List[str]) -> User | None:
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"""
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Tries to obtain the user object for a specific username, but ignores certain usernames.
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"""
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return self.user_by(user_name=user_name, ignore=ignore)
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def user_by(self, *, user_name: str, ignore: List[str] | None = None) -> User | None:
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if ignore is None:
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ignore = []
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if len(ignore) > 0 and user_name in ignore:
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return None
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predicate: Callable[[User], bool] = lambda user: user.name == user_name
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return find_single(predicate, self.all_users())
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def all_race_results(self) -> List[RaceResult]:
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"""
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Returns a list of all race results in the database, in descending order (most recent first).
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"""
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if self._all_race_results is None:
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self._all_race_results = db.session.query(RaceResult).join(RaceResult.race).order_by(desc(Race.number)).all()
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return self._all_race_results
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def race_result_by(self, *, race_name: str) -> RaceResult | None:
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"""
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Tries to obtain the race result corresponding to a race name.
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"""
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predicate: Callable[[RaceResult], bool] = lambda result: result.race.name == race_name
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return find_single_or_none(predicate, self.all_race_results())
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def all_race_guesses(self) -> List[RaceGuess]:
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"""
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Returns a list of all race guesses in the database.
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"""
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if self._all_race_guesses is None:
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self._all_race_guesses = db.session.query(RaceGuess).all()
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return self._all_race_guesses
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@overload
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def race_guesses_by(self, *, user_name: str) -> List[RaceGuess]:
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"""
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Returns a list of all race guesses made by a specific user.
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"""
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return self.race_guesses_by(user_name=user_name)
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@overload
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def race_guesses_by(self, *, race_name: str) -> List[RaceGuess]:
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"""
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Returns a list of all race guesses made for a specific race.
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"""
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return self.race_guesses_by(race_name=race_name)
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@overload
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def race_guesses_by(self, *, user_name: str, race_name: str) -> RaceGuess | None:
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"""
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Returns a single race guess by a specific user for a specific race, or None, if this guess doesn't exist.
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"""
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return self.race_guesses_by(user_name=user_name, race_name=race_name)
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@overload
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def race_guesses_by(self) -> Dict[str, Dict[str, RaceGuess]]:
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"""
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Returns a dictionary that maps race-ids to user-id - guess dictionaries.
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"""
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return self.race_guesses_by()
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def race_guesses_by(self, *, user_name: str | None = None, race_name: str | None = None) -> RaceGuess | List[RaceGuess] | Dict[str, Dict[str, RaceGuess]] | None:
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# List of all guesses by a single user
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if user_name is not None and race_name is None:
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predicate: Callable[[RaceGuess], bool] = lambda guess: guess.user_name == user_name
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return find_multiple(predicate, self.all_race_guesses())
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# List of all guesses for a single race
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if user_name is None and race_name is not None:
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predicate: Callable[[RaceGuess], bool] = lambda guess: guess.race_name == race_name
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return find_multiple(predicate, self.all_race_guesses())
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# Guess for a single race by a single user
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if user_name is not None and race_name is not None:
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predicate: Callable[[RaceGuess], bool] = lambda guess: guess.user_name == user_name and guess.race_name == race_name
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return find_single_or_none(predicate, self.all_race_guesses())
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# Dict with all guesses
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if user_name is None and race_name is None:
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guesses_by: Dict[str, Dict[str, RaceGuess]] = dict()
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guess: RaceGuess
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for guess in self.all_race_guesses():
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if guess.race_name not in guesses_by:
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guesses_by[guess.race_name] = dict()
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guesses_by[guess.race_name][guess.user_name] = guess
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return guesses_by
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raise Exception("race_guesses_by encountered illegal combination of arguments")
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def all_season_guesses(self) -> List[SeasonGuess]:
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if self._all_season_guesses is None:
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self._all_season_guesses = db.session.query(SeasonGuess).all()
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return self._all_season_guesses
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@overload
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def season_guesses_by(self, *, user_name: str) -> SeasonGuess:
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"""
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Returns the season guess made by a specific user.
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"""
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return self.season_guesses_by(user_name=user_name)
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@overload
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def season_guesses_by(self) -> Dict[str, SeasonGuess]:
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"""
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Returns a dictionary of season guesses mapped to usernames.
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"""
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return self.season_guesses_by()
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def season_guesses_by(self, *, user_name: str | None = None) -> SeasonGuess | Dict[str, SeasonGuess] | None:
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if user_name is not None:
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predicate: Callable[[SeasonGuess], bool] = lambda guess: guess.user_name == user_name
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return find_single_or_none(predicate, self.all_season_guesses())
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if user_name is None:
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guesses_by: Dict[str, SeasonGuess] = dict()
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guess: SeasonGuess
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for guess in self.all_season_guesses():
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guesses_by[guess.user_name] = guess
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return guesses_by
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raise Exception("season_guesses_by encountered illegal combination of arguments")
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def all_races(self) -> List[Race]:
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"""
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Returns a list of all races in the database.
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"""
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if self._all_races is None:
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self._all_races = db.session.query(Race).order_by(desc(Race.number)).all()
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return self._all_races
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def first_race_without_result(self) -> Race | None:
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"""
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Returns the first race-object with no associated race result.
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"""
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results: List[RaceResult] = self.all_race_results()
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if len(results) == 0:
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return self.all_races()[-1] # all_races is sorted descending by number
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most_recent_result: RaceResult = results[0]
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predicate: Callable[[Race], bool] = lambda race: race.number == most_recent_result.race.number + 1
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return find_first_or_none(predicate, self.all_races())
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def all_teams(self) -> List[Team]:
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"""
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Returns a list of all teams in the database.
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"""
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if self._all_teams is None:
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self._all_teams = db.session.query(Team).all()
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return self._all_teams
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def all_drivers(self) -> List[Driver]:
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"""
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Returns a list of all drivers in the database, including the NONE driver.
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"""
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if self._all_drivers is None:
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self._all_drivers = db.session.query(Driver).all()
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return self._all_drivers
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def all_drivers_except_none(self) -> List[Driver]:
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"""
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Returns a list of all drivers in the database, excluding the NONE driver.
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"""
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predicate: Callable[[Driver], bool] = lambda driver: driver.name != "None"
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return find_multiple(predicate, self.all_drivers())
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@overload
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def drivers_by(self, *, team_name: str) -> List[Driver]:
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"""
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Returns a list of all drivers driving for a certain team.
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"""
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return self.drivers_by(team_name=team_name)
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@overload
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def drivers_by(self) -> Dict[str, List[Driver]]:
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"""
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Returns a dictionary of drivers mapped to team names.
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"""
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return self.drivers_by()
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def drivers_by(self, *, team_name: str | None = None) -> List[Driver] | Dict[str, List[Driver]]:
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if team_name is not None:
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predicate: Callable[[Driver], bool] = lambda driver: driver.team.name == team_name
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return find_multiple(predicate, self.all_drivers_except_none(), 2)
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if team_name is None:
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drivers_by: Dict[str, List[Driver]] = dict()
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driver: Driver
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team: Team
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for team in self.all_teams():
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drivers_by[team.name] = []
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for driver in self.all_drivers_except_none():
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drivers_by[driver.team.name] += [driver]
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return drivers_by
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raise Exception("drivers_by encountered illegal combination of arguments")
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