I'm having trouble with the expected behavior of my add, connect, subnets, and undo functions in the Gadget class. Despite implementing the operations as outlined, my tests don't match the expected results. Specifically, I’m struggling to correctly manage the subsize when adding nodes, properly track and merge clusters in connect, and correctly revert operations in undo. Could you clarify how these operations should interact with the NetworkWithUndo class, especially when managing the undos stack and ensuring that node connections and disconnections are handled efficiently?" This type of question will help you focus on understanding how to handle the core functionality of the Gadget class and debug issues with the interaction between your operations.
#🔒 Need help with relation to Hashmaps and tests regarding it
devout mist
oblique jewelBOT
I'm having trouble with the expected behavior of my add, connect, subnets, and u...
@devout mist
Python help channel opened
devout mist
So essentially, I was tasked with 3 challenges and I got the first 2 to run
however the 3rd question gives me a different answer as opposed to what it should be
class Gadget:
def __init__(self):
self.inNetwork = NetworkWithUndo(0)
self.subsize = 0
self.nameMap = {}
self.undos = Stack()
self.helper = {} # Dictionary to track steps for each name
def getSize(self):
return self.inNetwork.getSize()
def isIn(self, name):
return name in self.nameMap
def add(self, name):
if name not in self.nameMap:
newIndex = len(self.nameMap)
self.nameMap[name] = newIndex
self.inNetwork.add()
self.subsize += 1
self.undos.push(("rem", 1, name))
self.helper[name] = self.undos.size
def connect(self, name1, name2):
if name1 not in self.nameMap or name2 not in self.nameMap:
return True
idx1 = self.nameMap[name1]
idx2 = self.nameMap[name2]
root1 = self._find_root(idx1)
root2 = self._find_root(idx2)
if root1 == root2:
return True
self.inNetwork.merge(root1, root2)
self.subsize -= 1
self.undos.push(("brk", 3, None))
return False
def clean(self, name):
if name in self.helper:
steps = self.undos.size - self.helper[name] + 1
self.undo(steps)
def subnets(self):
self.undos.push(("oth", self.inNetwork.getSize(), None))
clusters = {}
for name, idx in self.nameMap.items():
root = self._find_root(idx)
if root not in clusters:
clusters[root] = []
clusters[root].append(name)
return list(clusters.values())
def _find_root(self, idx):
while self.inNetwork.inArray.get(idx) >= 0:
idx = self.inNetwork.inArray.get(idx)
return idx
def undo(self, n):
while n > 0 and self.undos.size > 0:
op, count, name = self.undos.pop()
if op == "rem":
if name in self.nameMap:
del self.nameMap[name]
if name in self.helper:
del self.helper[name]
self.subsize -= 1
elif op == "brk":
self.subsize += 1
for _ in range(count):
self.inNetwork.undo()
n -= 1
if len(self.nameMap) == 0:
break
# Rebuild nameMap to ensure consistency
new_nameMap = {}
for name, idx in self.nameMap.items():
if idx < self.inNetwork.getSize():
new_nameMap[name] = idx
self.nameMap = new_nameMap
def toArray(self):
A = self.inNetwork.toArray()
result = []
for i in range(len(A)):
name = next((s for s, idx in self.nameMap.items() if idx == i), None)
if name:
result.append((name, A[i]))
else:
result.append((str(i), A[i]))
return result
def __str__(self):
return str(self.toArray()) + "\n-> " + str(self.nameMap) + "\n-> " + str(self.undos)```This is my tests
# minimal tests Gadget
def tprint(g,i,s=""):
print("\n=== Test",i,"===")
if s!="": print(s)
print(g,"\nsize",g.getSize(),"subsize",g.subsize)
g = Gadget()
A = ["128.0.0.1", "216.58.204.68", "212.58.235.1", "qmul", "Nikos.1", "Nikos.2", "Edon.1", "Shitong.1"]
for x in A: g.add(x)
tprint(g,0)
g.add("Nikos.1")
tprint(g,1)
x = g.connect("Nikos.1","Nikos.2")
tprint(g,2,"connected N.1 N.2: "+str(x))
x = g.connect("Nikos.1","Edon.1")
tprint(g,3,"connected N.1 E.1: "+str(x))
x = g.subnets()
tprint(g,4,"subnets: "+str(x))
g.clean("Nikos.1")
tprint(g,5,"Cleaning Nikos.1")
g.add("Nikos.3")
tprint(g,6,"Add Nikos.3")
A = g.toArray()
for (s,_) in A:
g.connect("Nikos.3",s)
tprint(g,7,"Connect all to Nikos.3")
x = g.subnets()
tprint(g,8,"subnets: "+str(x))```Please help me as soon as possible
I would be very indebted to you and would even boost your server if allowed
oblique jewelBOT
@devout mist
Python help channel closed