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Merge pull request #4 from JMR-dev/jr-membervariable_class_access

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Completed the factory
This commit was merged in pull request #4.
This commit is contained in:
Jason Ross
2022-08-09 10:34:19 -05:00
committed by GitHub
parent 7a2447da36 4f40a79085
commit d36794c1a7
2 changed files with 172 additions and 57 deletions
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Fleet.drawio.html
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fleet.py
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from abc import ABC, abstractmethod
import random
import enum
# ABC is imported from the standard library since Python does not natively support abstract methods and classes.
class Fleet():
fleet_members = []
def __init__(self, vtype, movspeed, travelmed, vehicleid):
self.vehicletype = vtype
self.movementspeed = movspeed
self.travelmedium = travelmed
self.uuid = vehicleid
def displayAllFleetMembers(self):
for i in self.vehicles:
print(i)
def displayVehicleType(self):
print(self.vehicletype)
for i in self.fleet_members:
print(str(i))
def addVehicle(self, newVehicleId):
self.fleet_members.append(newVehicleId)
class Vehicle(ABC):
'''Defines the properties of vehicles'''
# _fuelType = ("Diesel", "Gasoline", "Aviation Gas", "Electricity", "Nuclear", "100LL")
# https://www.geeksforgeeks.org/inheritance-and-composition-in-python/
def __str__(self):
return str(self.vehicleType)
@abstractmethod
def __init__(self, _gpsPosition, _velocity, _weight, _velocityType, _weightType, _status, vtype,movspeed, travelmed, vehicleid):
self.vehicleObject = Fleet(vtype,movspeed, travelmed, vehicleid)
def __init__(self, _gpsPosition, _velocity, _weight, _velocityType, _weightType, _status, vehicleid, _fuelType, _vehicleType):
self.gpsPosition = _gpsPosition
self.velocity = _velocity
self.velocityType = _weight
self.weightType = _velocityType
self.weight = _weightType
self.velocityType = _velocityType
self.weight = _weight
self.weightType = _weightType
self.status = _status
self.fuelType = _fuelType
self.vehicleType = _vehicleType
def loadCargo(self, _weight):
self.status = "loading cargo"
print(self.status)
class fuelTypes(enum.Enum):
Diesel = 1
Gasoline = 2
Aviation_Kerosene = 3
Electricity = 4
Nuclear = 5
Aviation_Gas = 6
class VehicleTypes(enum.Enum):
# This enum exists to provide easy access to the user creating a new object type
semi_Truck = 1
train = 2
truck = 3
van = 4
car = 5
hovercraft = 6
barge = 7
ship = 8
airplane = 9
helicopter = 10
class GroundVehicleInterface(ABC):
'''Resource on Python interfaces. This is duck typed. https://realpython.com/python-interface/ Interfaces make a contract that a method must be implemented if an interface is inherited and allows differing implementations of the same method.'''
@abstractmethod
def travel(self):
pass
class GroundVehicle(Vehicle, GroundVehicleInterface):
class GroundVehicle(Vehicle):
@abstractmethod
def __init__(self, _isModular, _moveGroundVehicle, _gpsPosition, _velocity, _weight, _velocityType, _weightType, _status, vtype,movspeed, travelmed, vehicleid):
super().__init__(_gpsPosition, _velocity, _weight, _velocityType, _weightType, _status, vtype,movspeed, travelmed, vehicleid)
def __init__(self, _isModular, _moveGroundVehicle, _gpsPosition, _velocity, _weight, _velocityType, _weightType, _status,vehicleid, _fuelType, _vehicleType):
super().__init__(_gpsPosition, _velocity, _weight, _velocityType, _weightType, _status,vehicleid, _fuelType, _vehicleType)
self.isModular = _isModular
# modifier to GPS position
self.moveGroundVehicle = _moveGroundVehicle
# modifier to GPS position
class RoadVehicle(GroundVehicle):
@abstractmethod
def __init__(self, _axlecount, _isModular, _moveGroundVehicle, _gpsPosition, _velocity, _weight, _velocityType, _weightType, _status, vtype,movspeed, travelmed, vehicleid):
super().__init__(_isModular, _moveGroundVehicle, _gpsPosition, _velocity, _weight, _velocityType, _weightType, _status, vtype,movspeed, travelmed, vehicleid)
def __init__(self, _axlecount, _isModular, _moveGroundVehicle, _gpsPosition, _velocity, _weight, _velocityType, _weightType, _status, vehicleid, _fuelType, _vehicleType):
super().__init__(_isModular, _moveGroundVehicle, _gpsPosition, _velocity, _weight, _velocityType, _weightType, _status, vehicleid, _fuelType, _vehicleType)
self.axleCount = _axlecount
class Train(GroundVehicle):
def __init__(self, _noOfCarsAttached, _locomotiveCount):
# Put class specific variables at the end of the constructor/super call
class Train(GroundVehicle, GroundVehicleInterface):
def __init__(self, _noOfCarsAttached, _locomotiveCount, _isModular, _moveGroundVehicle, _gpsPosition, _velocity, _weight, _velocityType, _weightType, _status, vehicleid, _fuelType):
super().__init__(_isModular, _moveGroundVehicle, _gpsPosition, _velocity, _weight, _velocityType, _weightType, _status, vehicleid, _fuelType, VehicleTypes.train)
self.noOfCarsAttached = _noOfCarsAttached
self.locomotiveCount = _locomotiveCount
@@ -73,32 +91,94 @@ class Train(GroundVehicle):
print(f"The train has {self.locomotiveCount} locomotives attached.")
def travel(self):
print("Speed 60mph, Direction E")
def loadCargo(self, _weight, _noOfCarsAttached):
super().loadCargo(_weight)
self.weight = _weight + input(f"Enter cargo weight (integer values only).")
try:
weight = int(weight)
except ValueError:
self.weight = _weight + input(f"That entry was not an integer. Enter cargo weight in integers only.")
Train1 = Train(20, 2)
# Pattern used for loadCargo - https://stackoverflow.com/questions/38987072/how-to-force-integer-input-in-python-3-x
# Train1 = Train(20, 2)
Train1.displayCarCount()
Train1.displayLocomotiveCount()
# Train1.displayCarCount()
# Train1.displayLocomotiveCount()
# At this point, my code should print out the values from the car count and the locomotive count. Further demonstration of abstract and concrete classes to follow.
# Always encapsulate parent constructors into child classes to make those variables available
class semi_Truck(RoadVehicle):
def __init__(self, _noOfTrailersAttached, _axlecount, _isModular, _moveGroundVehicle, _gpsPosition, _velocity, _weight, _velocityType, _weightType, _status, vtype,movspeed, travelmed, vehicleid):
class semi_Truck(RoadVehicle, GroundVehicleInterface):
def __init__(self, _noOfTrailersAttached, _axlecount, _isModular, _moveGroundVehicle, _gpsPosition, _velocity, _weight, _velocityType, _weightType, _status, vehicleid, _fuelType):
self.noOfTrailersAttached = _noOfTrailersAttached
# super in Python returns an object representing the parent class and
super().__init__(_axlecount, _isModular, _moveGroundVehicle, _gpsPosition, _velocity, _weight, _velocityType, _weightType, _status, vtype,movspeed, travelmed, vehicleid)
super().__init__(_axlecount, _isModular, _moveGroundVehicle, _gpsPosition, _velocity, _weight, _velocityType, _weightType, _status, vehicleid, _fuelType, VehicleTypes.semi_Truck)
# Don't modify passed in values unless absolutely necessary
def displaySemiAttributes(self):
print(f"The semi has {self.noOfTrailersAttached} trailers attached", f"and {self.axleCount} axles.")
def travel(self):
print(self.status)
def loadCargo(self, _weight):
super().loadCargo(_weight)
# How do I access the set value in the init above?
try:
self.weight = _weight + int(input(f"Enter cargo weight (integer values only)."))
print(f"The semi truck is {self.status}.", f"Cargo weight is {self.weight}.")
except ValueError:
self.weight = _weight + int(input(f"That entry was not an integer. Enter cargo weight in integers only."))
print(f"The semi truck is {self.status}.", f"Cargo weight is {self.weight}.")
# https://realpython.com/factory-method-python/
# Factory method patterns, both standard and polymorphic - https://python-3-patterns-idioms-test.readthedocs.io/en/latest/Factory.html#preventing-direct-creation
class VehicleFactory():
def factory(self, _type):
# try:
if _type == VehicleTypes.semi_Truck:
truckToBuild = semi_Truck(2, 4, True, [40.0000, 50.0000], [30.0000, 20.000], 60, 90000, "mph", "lbs", "traveling", "307UNHL", fuelTypes.Diesel)
return truckToBuild
# Make these parameters and not hard coded values
elif _type == VehicleTypes.train:
return Train(4, 5, True, [40.0000, 50.0000], [30.0000, 20.000], 60, 90000, "mph", "lbs", "traveling", "307UNHL", fuelTypes.Diesel )
else:
print("Bad vehicle creation: " + str(type))
# except TypeError:
# print("Unexpected object creation error")
ShippingFleet = Fleet()
factory1 = VehicleFactory()
SemiTruck1 = factory1.factory(VehicleTypes.semi_Truck)
# print(SemiTruck1)
Train1 = factory1.factory(VehicleTypes.train)
ShippingFleet.addVehicle(Train1)
ShippingFleet.addVehicle(SemiTruck1)
# ShippingFleet.displayAllFleetMembers()
ShippingFleet.displayAllFleetMembers()
# Create object first before asking for input. Then insert object
STruck = semi_Truck(2, 4, True, [40.0000, 40.0000], [56.0000, 89.0000], 60, 90000, "mph", "lbs,", "Ready", "Semi Truck", 100, "Ground", "1F8HNG7")
# STruck = semi_Truck(2, 4, True, [40.0000, 40.0000], [56.0000, 89.0000], 60, 90000, "mph", "lbs,", "Ready", "1F8HNG7", "diesel")
# When possible, build your argument requirements from the top down so that by the time you implement your concrete classes, you know all the data points that you need to include.
# Remember to be careful to check that you are running the method on an instance of the class, not on the class definition.
STruck.displaySemiAttributes()
# STruck.displaySemiAttributes()
# STruck.loadCargo(90000)
# Next - implement abstracted methods and constructor classes. Demonstrate use of super if Python supports it.
@@ -106,22 +186,45 @@ STruck.displaySemiAttributes()
# Make vehicle objects, add them to the fleet, and then have displayAllVehicles show the newly added vehicle. Stretch/further off, have different types of vehicles travel regardless of type.
'''
Code scratchpad
Code scratchpad
For the travel method implemented from the interface
For the travel method implemented from the interface
Vehicle.velocity = self.moveGroundVehicle
print("Traveling")
Vehicle.velocity = self.moveGroundVehicle
print("Traveling")
Object implementation
Semi_Truck1 = semi_Truck(f"This truck has {2} trailers attached", f"and {4} axles.", True, [49.8900000, 50.900000])
# vehicle1 = Fleet("car", 120, "ground", Fleet.vehicles[0])
# vehicle1.displayAllFleetMembers()
# addVehicle = Fleet("hovercraft", 50, "ground/water", 0)
# vehicle1.displayAllFleetMembers()
Error message
Enter cargo weight (integer values only).70000
Traceback (most recent call last):
File "/Users/jason.ross/workspace/python_oop_practice/vehicle_oop_example/fleet.py", line 126, in <module>
STruck.loadCargo(90000)
File "/Users/jason.ross/workspace/python_oop_practice/vehicle_oop_example/fleet.py", line 113, in loadCargo
self.weight = _weight + input(f"Enter cargo weight (integer values only).")
TypeError: unsupported operand type(s) for +: 'int' and 'str'
Scrapped factory class
def inputFunc(self, user_input, listVehicleTypes):
def _listVtypes():
listVehicleTypes = print(map(VehicleTypes))
return listVehicleTypes
user_input = [input("Enter vehicle weight"), ]
return listVehicleTypes, user_input
Object implementation
Semi_Truck1 = semi_Truck(f"This truck has {2} trailers attached", f"and {4} axles.", True, [49.8900000, 50.900000])
# vehicle1 = Fleet("car", 120, "ground", Fleet.vehicles[0])
# vehicle1.displayAllFleetMembers()
# addVehicle = Fleet("hovercraft", 50, "ground/water", 0)
# vehicle1.displayAllFleetMembers()
'''
def serialize(self, user_input, inputFunc):
serializer = inputFunc(user_input, VehicleTypes)
return serializer(user_input)
'''