def test_inventory_list(self):
inv = Inventory(10)
inv.set(Good.grain, 5, 1.5)
self.assertTrue(inv.add(Good.tools, 2, 3.25))
self.assertTrue(inv.add(Good.tools, 3, 4.25))
g1 = inv.get(Good.grain)
g2 = inv.get(Good.tools)
self.assertEqual(g1[0].amount, 5)
self.assertEqual(g1[0].price, 1.5)
self.assertEqual(g2[0].amount, 2)
self.assertEqual(g2[0].price, 3.25)
self.assertEqual(g2.amount, 5)
self.assertEqual(g2.price, 7.5)
inv.add(Good.iron_ore, 1)
inv.add(Good.iron_ore, 1)
self.assertEqual(len(inv.get(Good.iron_ore)), 1)
inv.add(Good.iron_ore, 1, 1)
inv.add(Good.iron_ore, 2, 2)
self.assertEqual(len(inv.get(Good.iron_ore)), 3)
self.assertEqual(inv.get_amount(Good.fish), 0)
def test_inventory_list(self):
inv = Inventory(10)
inv.set(Good.grain, 5, 1.5)
self.assertTrue(inv.add(Good.tools, 2, 3.25))
self.assertTrue(inv.add(Good.tools, 3, 4.25))
g1 = inv.get(Good.grain)
g2 = inv.get(Good.tools)
self.assertEqual(g1[0].amount, 5)
self.assertEqual(g1[0].price, 1.5)
self.assertEqual(g2[0].amount, 2)
self.assertEqual(g2[0].price, 3.25)
self.assertEqual(g2.amount, 5)
self.assertEqual(g2.price, 7.5)
inv.add(Good.iron_ore, 1)
inv.add(Good.iron_ore, 1)
self.assertEqual(len(inv.get(Good.iron_ore)), 1)
inv.add(Good.iron_ore, 1, 1)
inv.add(Good.iron_ore, 2, 2)
self.assertEqual(len(inv.get(Good.iron_ore)), 3)
self.assertEqual(inv.get_amount(Good.fabric), 0)
class Pop(object):
"""
A simulated unit of population
"""
def __init__(self, province, pop_type, population):
"""
Creates a new Pop.
manager (Historia)
province (SecondaryDivision)
culture (Culture)
religion (Religion)
language (Language)
job (Job)
"""
self.province = province
self.id = unique_id('po')
self.population = population
self.pop_type = pop_type
# ECONOMY
self.money = 10
self.money_yesterday = 0
self.bankrupt = False
# set inventory and ideal amounts
self.inventory = Inventory(200)
for item in self.pop_type.start_inventory:
self.inventory.add(item['good'], item['amount'])
self.change_pop_type(pop_type)
# a dictionary of Goods to PriceRanges
# represents the price range the agent considers valid for each Good
self.price_belief = {}
# a dictionary of Goods to price list
# represents the prices of the good that the Pop has observed
# during the time they have been trading
self.observed_trading_range = {}
# make some fake initial data
for good in Good.all():
avg_price = self.market.avg_historial_price(good, 15)
# fake trades
self.observed_trading_range[good] = [
avg_price * 0.5,
avg_price * 1.5
]
# generate fake price belief
self.price_belief[good] = PriceRange(avg_price * 0.5, avg_price * 1.5)
self.successful_trades = 0
self.failed_trades = 0
def change_pop_type(self, pop_type):
self.pop_type = pop_type
# update ideal
for item in self.pop_type.ideal_inventory:
self.inventory.set_ideal(item['good'], item['amount'])
# Economic methods
@property
def market(self):
return self.province.market
@property
def profit(self):
return self.money - self.money_yesterday
def perform_production(self):
"Depending on PopType, perform production by reducing inventory and producing another item"
logic = self.pop_type.logic(self)
logic.perform()
def create_buy_order(self, good, limit):
"Create a buy order for a given Good at a determined quantity"
bid_price = self.determine_price_of(good)
ideal = self.determine_buy_quantity(good)
# can't buy more than limit
quantity_to_buy = limit if ideal > limit else ideal
if quantity_to_buy > 0:
return Order(self, OrderType.buy_order, quantity_to_buy, bid_price, good)
return False
def create_sell_order(self, good, limit):
"Create a sell order for a given Good at a determined quantity"
sell_price = self.determine_price_of(good)
ideal = self.determine_sell_quantity(good)
# can't buy more than limit
quantity_to_sell = limit if ideal < limit else ideal
if quantity_to_sell > 0:
return Order(self, OrderType.sell_order, quantity_to_sell, sell_price, good)
return False
def price_belief_for(self, good):
"Gets the price belief this agent has for a particular Good"
if good in self.price_belief:
return self.price_belief[good]
def determine_price_of(self, good):
"Determine the price of a particular good"
return self.price_belief_for(good).random()
def trading_range_extremes(self, good):
"Gets the lowest and highst price of a Good this agent has seen"
trading_range = self.observed_trading_range[good]
return PriceRange(min(trading_range), max(trading_range))
def determine_sell_quantity(self, good):
"Determine how much inventory goods to sell based on market conditions"
mean = self.market.avg_historial_price(good, 15)
trading_range = self.trading_range_extremes(good)
favoribility = position_in_range(mean, trading_range.low, trading_range.high)
amount_to_sell = round(favoribility * self.inventory.surplus(good))
if amount_to_sell < 1:
amount_to_sell = 1
return amount_to_sell
def determine_buy_quantity(self, good):
"Determine how much goods to buy based on market conditions"
mean = self.market.avg_historial_price(good, 15)
trading_range = self.trading_range_extremes(good)
favoribility = 1 - position_in_range(mean, trading_range.low, trading_range.high)
amount_to_buy = round(favoribility * self.inventory.shortage(good))
if amount_to_buy < 1:
amount_to_buy = 1
return amount_to_buy
def generate_orders(self, good):
"""
If the Pop needs a Good to perform production, buy it
If the Pop has surplus Resources, sell them
"""
surplus = self.inventory.surplus(good)
if surplus >= 1: # sell inventory
# the original only old one item here
sell_amount = surplus
order = self.create_sell_order(good, surplus)
if order:
print('{} sells {} {}'.format(self.pop_type.title, sell_amount, good.name))
self.market.sell(order)
else: # buy more
shortage = self.inventory.shortage(good)
free_space = self.inventory.empty_space
if shortage > 0:
if shortage <= free_space:
# enough space for ideal order
limit = shortage
else:
# not enough space for ideal order
limit = math.floor(free_space / shortage)
if limit > 0:
order = self.create_buy_order(good, limit)
if order:
print('{} buys {} {}'.format(self.pop_type.title, limit, good.name))
self.market.buy(order)
# else:
# print("{} has no shortage of {} (has shortage: {})".format(self.pop_type.title, good.title, shortage))
def update_price_model(self, good, order_type, is_successful, clearing_price=0):
"""
Update the Pop's price model for the given resource
good (Good) The Good which was orderd
order_type (OrderType) Which kind of Order this was
is_successful (bool) whether or not the Order was successful
clearing_price (float) The price per unit of the good that was ordered
as defined by the Pop which ordered it
"""
SIGNIFICANT = 0.25 # 25% more or less is "significant"
SIG_IMBALANCE = 0.33
LOW_INVENTORY = 0.1 # 10% of ideal inventory = "LOW"
HIGH_INVENTORY = 2.0 # 200% of ideal inventory = "HIGH"
MIN_PRICE = 0.01 # lowest allowed price of a Good
if is_successful:
# add this trade to the observed trading range
self.observed_trading_range[good].append(clearing_price)
public_mean_price = self.market.avg_historial_price(good, 1)
belief = self.price_belief[good]
mean = belief.mean()
wobble = 0.05 # the degree which the Pop should bid outside the belief
# how different the public mean price is from the price belief
delta_to_mean = mean - public_mean_price
if is_successful:
if order_type is OrderType.buy_order and delta_to_mean > SIGNIFICANT:
# this Pop overpaid, shift belief towards mean
belief.low -= delta_to_mean / 2
belief.high -= delta_to_mean / 2
elif order_type is OrderType.sell_order and delta_to_mean < -SIGNIFICANT:
# this Pop underpaid!, shift belief towards mean
belief.low -= delta_to_mean / 2
belief.high -= delta_to_mean / 2
# increase the belief's certainty
belief.low += wobble * mean
belief.high -= wobble * mean
else:
# shift towards mean
belief.low -= delta_to_mean / 2
belief.high -= delta_to_mean / 2
# check for inventory special cases
stocks = self.inventory.get_amount(good)
ideal = self.inventory.get_ideal(good)
# if we're buying and inventory is too low
# meaning we're desperate to buy
if order_type is OrderType.buy_order and stocks < LOW_INVENTORY * ideal:
wobble *= 2
# if we're selling and inventory is too high
# meaning we're desperate to sell
elif order_type is OrderType.sell_order and stocks > HIGH_INVENTORY * ideal:
wobble *= 2
# all other cases
else:
buys = self.market.history.buy_orders.average(good, 1)
sells = self.market.history.sell_orders.average(good, 1)
supply_vs_demand = (buys - sells) / (buys + sells)
if supply_vs_demand > SIG_IMBALANCE or supply_vs_demand < -SIG_IMBALANCE:
# too much supply? lower bid lower to sell faster
# too much demand? raise price to buy faster
new_mean = public_mean_price * (1 - supply_vs_demand)
delta_to_mean = mean - new_mean
# shift the price belief to the new price mean
belief.low -= delta_to_mean / 2
belief.high -= delta_to_mean / 2
# decrease belief's certainty since we've just changed it (we could be wrong)
belief.low -= wobble * mean
belief.high += wobble * mean
# make sure the price belief doesn't decrease below the minimum
if belief.low < MIN_PRICE:
belief.low = MIN_PRICE
elif belief.high < MIN_PRICE:
belief.high = MIN_PRICE
def __repr__(self):
return "<Pop: id={} type={}>".format(self.id, self.pop_type.title)
def __eq__(self, other):
return self.id == other.id
def __key__(self):
return self.id
def __hash__(self):
return hash(self.__key__())
def export(self):
return {
'pop_type': self.pop_type.ref(),
'inventory': self.inventory.export(),
'money': self.money,
'money_yesterday': self.money_yesterday,
'successful_trades': self.successful_trades,
'failed_trades': self.failed_trades,
}
class Pop(object):
"""
A simulated unit of population
"""
def __init__(self, province, pop_type, population):
"""
Creates a new Pop.
manager (Historia)
province (SecondaryDivision)
culture (Culture)
religion (Religion)
language (Language)
job (Job)
"""
self.province = province
self.id = unique_id('po')
self.population = population
self.pop_type = pop_type
# ECONOMY
self.money = 10
self.money_yesterday = 0
self.bankrupt = False
# set inventory and ideal amounts
self.inventory = Inventory(200)
for item in self.pop_type.start_inventory:
self.inventory.add(item['good'], item['amount'])
self.change_pop_type(pop_type)
# a dictionary of Goods to PriceRanges
# represents the price range the agent considers valid for each Good
self.price_belief = {}
# a dictionary of Goods to price list
# represents the prices of the good that the Pop has observed
# during the time they have been trading
self.observed_trading_range = {}
# make some fake initial data
for good in Good.all():
avg_price = self.market.avg_historial_price(good, 15)
# fake trades
self.observed_trading_range[good] = [
avg_price * 0.5, avg_price * 1.5
]
# generate fake price belief
self.price_belief[good] = PriceRange(avg_price * 0.5,
avg_price * 1.5)
self.successful_trades = 0
self.failed_trades = 0
def change_pop_type(self, pop_type):
self.pop_type = pop_type
# update ideal
for item in self.pop_type.ideal_inventory:
self.inventory.set_ideal(item['good'], item['amount'])
# Economic methods
@property
def market(self):
return self.province.market
@property
def profit(self):
return self.money - self.money_yesterday
def perform_production(self):
"Depending on PopType, perform production by reducing inventory and producing another item"
logic = self.pop_type.logic(self)
logic.perform()
def create_buy_order(self, good, limit):
"Create a buy order for a given Good at a determined quantity"
bid_price = self.determine_price_of(good)
ideal = self.determine_buy_quantity(good)
# can't buy more than limit
quantity_to_buy = limit if ideal > limit else ideal
if quantity_to_buy > 0:
return Order(self, OrderType.buy_order, quantity_to_buy, bid_price,
good)
return False
def create_sell_order(self, good, limit):
"Create a sell order for a given Good at a determined quantity"
sell_price = self.determine_price_of(good)
ideal = self.determine_sell_quantity(good)
# can't buy more than limit
quantity_to_sell = limit if ideal < limit else ideal
if quantity_to_sell > 0:
return Order(self, OrderType.sell_order, quantity_to_sell,
sell_price, good)
return False
def price_belief_for(self, good):
"Gets the price belief this agent has for a particular Good"
if good in self.price_belief:
return self.price_belief[good]
def determine_price_of(self, good):
"Determine the price of a particular good"
return self.price_belief_for(good).random()
def trading_range_extremes(self, good):
"Gets the lowest and highst price of a Good this agent has seen"
trading_range = self.observed_trading_range[good]
return PriceRange(min(trading_range), max(trading_range))
def determine_sell_quantity(self, good):
"Determine how much inventory goods to sell based on market conditions"
mean = self.market.avg_historial_price(good, 15)
trading_range = self.trading_range_extremes(good)
favoribility = position_in_range(mean, trading_range.low,
trading_range.high)
amount_to_sell = round(favoribility * self.inventory.surplus(good))
if amount_to_sell < 1:
amount_to_sell = 1
return amount_to_sell
def determine_buy_quantity(self, good):
"Determine how much goods to buy based on market conditions"
mean = self.market.avg_historial_price(good, 15)
trading_range = self.trading_range_extremes(good)
favoribility = 1 - position_in_range(mean, trading_range.low,
trading_range.high)
amount_to_buy = round(favoribility * self.inventory.shortage(good))
if amount_to_buy < 1:
amount_to_buy = 1
return amount_to_buy
def generate_orders(self, good):
"""
If the Pop needs a Good to perform production, buy it
If the Pop has surplus Resources, sell them
"""
surplus = self.inventory.surplus(good)
if surplus >= 1: # sell inventory
# the original only old one item here
sell_amount = surplus
order = self.create_sell_order(good, surplus)
if order:
print('{} sells {} {}'.format(self.pop_type.title, sell_amount,
good.name))
self.market.sell(order)
else: # buy more
shortage = self.inventory.shortage(good)
free_space = self.inventory.empty_space
if shortage > 0:
if shortage <= free_space:
# enough space for ideal order
limit = shortage
else:
# not enough space for ideal order
limit = math.floor(free_space / shortage)
if limit > 0:
order = self.create_buy_order(good, limit)
if order:
print('{} buys {} {}'.format(self.pop_type.title,
limit, good.name))
self.market.buy(order)
# else:
# print("{} has no shortage of {} (has shortage: {})".format(self.pop_type.title, good.title, shortage))
def update_price_model(self,
good,
order_type,
is_successful,
clearing_price=0):
"""
Update the Pop's price model for the given resource
good (Good) The Good which was orderd
order_type (OrderType) Which kind of Order this was
is_successful (bool) whether or not the Order was successful
clearing_price (float) The price per unit of the good that was ordered
as defined by the Pop which ordered it
"""
SIGNIFICANT = 0.25 # 25% more or less is "significant"
SIG_IMBALANCE = 0.33
LOW_INVENTORY = 0.1 # 10% of ideal inventory = "LOW"
HIGH_INVENTORY = 2.0 # 200% of ideal inventory = "HIGH"
MIN_PRICE = 0.01 # lowest allowed price of a Good
if is_successful:
# add this trade to the observed trading range
self.observed_trading_range[good].append(clearing_price)
public_mean_price = self.market.avg_historial_price(good, 1)
belief = self.price_belief[good]
mean = belief.mean()
wobble = 0.05 # the degree which the Pop should bid outside the belief
# how different the public mean price is from the price belief
delta_to_mean = mean - public_mean_price
if is_successful:
if order_type is OrderType.buy_order and delta_to_mean > SIGNIFICANT:
# this Pop overpaid, shift belief towards mean
belief.low -= delta_to_mean / 2
belief.high -= delta_to_mean / 2
elif order_type is OrderType.sell_order and delta_to_mean < -SIGNIFICANT:
# this Pop underpaid!, shift belief towards mean
belief.low -= delta_to_mean / 2
belief.high -= delta_to_mean / 2
# increase the belief's certainty
belief.low += wobble * mean
belief.high -= wobble * mean
else:
# shift towards mean
belief.low -= delta_to_mean / 2
belief.high -= delta_to_mean / 2
# check for inventory special cases
stocks = self.inventory.get_amount(good)
ideal = self.inventory.get_ideal(good)
# if we're buying and inventory is too low
# meaning we're desperate to buy
if order_type is OrderType.buy_order and stocks < LOW_INVENTORY * ideal:
wobble *= 2
# if we're selling and inventory is too high
# meaning we're desperate to sell
elif order_type is OrderType.sell_order and stocks > HIGH_INVENTORY * ideal:
wobble *= 2
# all other cases
else:
buys = self.market.history.buy_orders.average(good, 1)
sells = self.market.history.sell_orders.average(good, 1)
supply_vs_demand = (buys - sells) / (buys + sells)
if supply_vs_demand > SIG_IMBALANCE or supply_vs_demand < -SIG_IMBALANCE:
# too much supply? lower bid lower to sell faster
# too much demand? raise price to buy faster
new_mean = public_mean_price * (1 - supply_vs_demand)
delta_to_mean = mean - new_mean
# shift the price belief to the new price mean
belief.low -= delta_to_mean / 2
belief.high -= delta_to_mean / 2
# decrease belief's certainty since we've just changed it (we could be wrong)
belief.low -= wobble * mean
belief.high += wobble * mean
# make sure the price belief doesn't decrease below the minimum
if belief.low < MIN_PRICE:
belief.low = MIN_PRICE
elif belief.high < MIN_PRICE:
belief.high = MIN_PRICE
def __repr__(self):
return "<Pop: id={} type={}>".format(self.id, self.pop_type.title)
def __eq__(self, other):
return self.id == other.id
def __key__(self):
return self.id
def __hash__(self):
return hash(self.__key__())
def export(self):
return {
'pop_type': self.pop_type.ref(),
'inventory': self.inventory.export(),
'money': self.money,
'money_yesterday': self.money_yesterday,
'successful_trades': self.successful_trades,
'failed_trades': self.failed_trades,
}