from SortedLList import SortedLList

class Shipyard:
def __init__(self):
   # Initialize the shipyard with empty containers list
   self.containers = SortedLList()

def add(self, owner, destination, weight):
   # First, create a new package
   pkg = Package(owner, destination, weight)
   # Check if there is already a container for the package destination
   if not self.containers.isEmpty():
         for cnt in self.containers:
            # Also check if the capacity is enough
            if cnt.destination == destination and cnt.capacity >= weight:
               # Add the package to container and update capacity
               cnt.add(pkg)
               cnt.capacity -= weight
               print("Package succesfully added!")
               return

   # Otherwise, we have to create a new container
   cnt = Container()
   # Check if package weight exceeds capacity
   if pkg.weight <= cnt.capacity:
         # add the new package to it, so it can get the destination attribute
         cnt.add(pkg)
         cnt.capacity -= weight
         # and add the container to the Shipyard list, sorted by destination attribute alphabetically
         self.containers.insert(cnt, 'destination')
         print("Package succesfully added!")
   else:
         print("Package too heavy to be added!")

def printAll(self):
   # print headline
   print("Shipping yard contents:")
   # we can traverse the list with for loop since we defined __iter__ method in SortedLList class
   for cnt in self.containers:
         # print each container info
         # we can say print(cnt) because we defined __str__ method in Container class
         print(cnt)
         print("Container content: ")
         for pkg in cnt.packages:
            # print each package info
            print(pkg)

def printContainers(self):
   # Print container info
   print("Containers list: ")
   for cnt in self.containers:
         print(cnt)

def printDest(self, destination):
   # Print all the container heading for specific destination
   # with their contents
   print("Containers set for the", destination, ':')
   for cnt in self.containers:
         if cnt.destination == destination:
            print(cnt)
            print("Container content: ")
            for pkg in cnt.packages:
               print(pkg)

Part A: Random Numbers This is a small exercise in random numbers...