courselist_LV.py - class Node: "A class used to represent a...

class Node:
"""A class used to represent a Node in a Doubly Linked List"""
def __init__(self, value=None):
"""Constructor for the Node class"""
self.value = value
self.next = None
self.prev = None
def __str__(self):
"""ToString implementation for the Node class"""
return str(self.value)
# In[36]:
class CourseList:
"""A class containing a list of items linked through references"""
def __init__(self):
"""Constructor for the LinkedList class"""
self.head = None
self.last = None
self.count = 0
def __str__(self):
"""ToString implementation for the LinkedList class"""
result = ""
current = self.head
while current != None:
result += str(current.value)
result += "\n"
current = current.next
return result
def __iter__(self):
self.currentIter = self.head
return self
def __next__(self):
if self.currentIter != None:
self.currentIter = self.currentIter.next
if self.currentIter == None:
raise StopIteration()
return self.currentIter
else:
raise StopIteration()
def calculate_gpa(self):
gpa = 0.0
node =self.head
if self.size() > 0:
compute = 0.0
count = 0.0
for i in range( self.length() ):
str(node.value.credit_hr()), str(node.value.grade())
compute += ( node.value.credit_hr() * node.value.grade() )
count += node.value.credit_hr()
nodePrev = node
node = node.next
gpa = compute / count