mirror of
https://github.com/TheAlgorithms/Python.git
synced 2024-11-24 05:21:09 +00:00
41 lines
940 B
Python
41 lines
940 B
Python
# Author: OMKAR PATHAK
|
||
|
||
# We can use Python's dictionary for constructing the graph
|
||
|
||
class AdjacencyList(object):
|
||
def __init__(self):
|
||
self.List = {}
|
||
|
||
def addEdge(self, fromVertex, toVertex):
|
||
# check if vertex is already present
|
||
if fromVertex in self.List.keys():
|
||
self.List[fromVertex].append(toVertex)
|
||
else:
|
||
self.List[fromVertex] = [toVertex]
|
||
|
||
def printList(self):
|
||
for i in self.List:
|
||
print(i,'->',' -> '.join([str(j) for j in self.List[i]]))
|
||
|
||
if __name__ == '__main__':
|
||
al = AdjacencyList()
|
||
al.addEdge(0, 1)
|
||
al.addEdge(0, 4)
|
||
al.addEdge(4, 1)
|
||
al.addEdge(4, 3)
|
||
al.addEdge(1, 0)
|
||
al.addEdge(1, 4)
|
||
al.addEdge(1, 3)
|
||
al.addEdge(1, 2)
|
||
al.addEdge(2, 3)
|
||
al.addEdge(3, 4)
|
||
|
||
al.printList()
|
||
|
||
# OUTPUT:
|
||
# 0 -> 1 -> 4
|
||
# 1 -> 0 -> 4 -> 3 -> 2
|
||
# 2 -> 3
|
||
# 3 -> 4
|
||
# 4 -> 1 -> 3
|