Trying to make installable package

EngieApi/Contracts.py

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+import datetime
+
+import numpy as np
+
+from EngieApi.DistributionCosts import Capaciteitstarief
+from EngieApi.EngieAPI import EngieAPI
+
+
+class Dynamic:
+    def __init__(self, btw=1.21):
+
+        self.btw = btw
+        self.vast = 100.7  # EUR / jaar
+
+        self.groene_stroom = 0.00530  # EUR / kWh
+        self.wwk = 0.02544  # EUR / kWh
+
+        # Supplementen
+        self.energiebijdrage = 0.0020417  # EUR / kWh
+        # federale accijns
+        # 0 < kwh < 20000: 1.44160 cent / kWh
+        # 20000 < kwh < 50000: 1.22748 cent / kWh
+        # 50000 < kwh < 100000: 1.15540 cent / kWh
+        self.federale_accijns = 0.0144160  # EUR / kWh
+
+    def calculate_price_per_kwh(self, date, peak: float):
+        """calculate_price_per_kwh
+
+        :param date: date to calculate for
+        :type date: date
+        """
+        api = EngieAPI()
+        epex_spot = np.array(api.get_epex_spot(date))
+
+        prijs = 0.2040 + 0.1 * (epex_spot)  # zonder BTW per Cent/kWh
+        # cent to eur
+        prijs /= 100
+        prijs += self.groene_stroom + self.wwk + self.energiebijdrage + self.federale_accijns
+        
+        # distirbution costs
+        d = Capaciteitstarief()
+        p, yearly = d.calculate_per_kwh(peak=peak)
+        prijs += p
+        
+        # add btw
+        prijs *= self.btw
+        return prijs, yearly + self.vast
+
+    def calculate_total_price_for_day(self, verbruik: list[int], date: datetime.date, peak: float) -> float:
+        """calculate_total_price_for_day calculate total price for given usage
+
+        :param verbruik: a list of hourly usage values
+        :type verbruik: list[int]
+        :param date: the date for the energy prices
+        :type date: datetime.date
+        :param peak: the monthly peak for the distribution costs
+        :type peak: float
+        :return: the total calculated price
+        :rtype: float
+        """
+        prices, yearly = self.calculate_price_per_kwh(date, peak)
+
+        total = np.dot(prices, np.array(verbruik).T) + yearly / 365
+        return total