def linear_utility(self, amount_by_currency: CurrencyHoldings) -> float:
"""
Compute agent's utility given her utility function params and a currency bundle.
:param amount_by_currency: the currency holdings (dictionary) with the identifier (key) and quantity (value) for each currency
:return: utility value
"""
result = linear_utility(self.exchange_params_by_currency,
amount_by_currency)
return result
def linear_utility(self, amount_by_currency_id: CurrencyHoldings) -> float:
"""
Compute agent's utility given her utility function params and a currency bundle.
:param amount_by_currency_id: the currency holdings (dictionary) with the identifier (key) and quantity (value) for each currency
:return: utility value
"""
assert self.is_initialized, "Preferences params not set!"
result = linear_utility(self.exchange_params_by_currency_id,
amount_by_currency_id)
return result
def test_linear_utility():
"""Test logarithmic utlity."""
assert (linear_utility(
exchange_params_by_currency_id={
"cur_1": 0.2,
"cur_2": 0.8
},
balance_by_currency_id={
"cur_1": 20,
"cur_2": 100
},
) > 0), "Utility should be positive."
def get_score(self) -> float:
"""
Compute the score of the current state.
The score is computed as the sum of all the utilities for the good holdings
with positive quantity plus the money left.
:return: the score.
"""
goods_score = logarithmic_utility(self.utility_params_by_good_id,
self.quantities_by_good_id)
money_score = linear_utility(self.exchange_params_by_currency_id,
self.amount_by_currency_id)
score = goods_score + money_score
return score