Modernize Python 2 code to get ready for Python 3

Author: cclauss

ciphers/playfair_cipher.py

@@ -85,7 +85,7 @@ def decode(ciphertext, key):
     plaintext = ""
 
     # https://en.wikipedia.org/wiki/Playfair_cipher#Description
-    for char1, char2 in chunk(ciphertext, 2):
+    for char1, char2 in chunker(ciphertext, 2):
         row1, col1 = divmod(table.index(char1), 5)
         row2, col2 = divmod(table.index(char2), 5)
 

data_structures/AVL/AVL.py

@@ -1,6 +1,7 @@
 '''
 A AVL tree
 '''
+from __future__ import print_function
 
 
 class Node:

data_structures/Graph/BellmanFord.py

@@ -1,3 +1,5 @@
+from __future__ import print_function
+
 def printDist(dist, V):
 	print("\nVertex Distance")
 	for i in range(V):

data_structures/Graph/BreadthFirstSearch.py

@@ -1,4 +1,6 @@
 # Author: OMKAR PATHAK
+from __future__ import print_function
+
 
 class Graph():
     def __init__(self):

data_structures/Graph/DepthFirstSearch.py

@@ -1,4 +1,6 @@
 # Author: OMKAR PATHAK
+from __future__ import print_function
+
 
 class Graph():
     def __init__(self):

data_structures/Graph/Dijkstra.py

@@ -1,3 +1,4 @@
+from __future__ import print_function
 
 def printDist(dist, V):
 	print("\nVertex Distance")

data_structures/Graph/FloydWarshall.py

@@ -1,3 +1,4 @@
+from __future__ import print_function
 
 def printDist(dist, V):
 	print("\nThe shortest path matrix using Floyd Warshall algorithm\n")
@@ -7,7 +8,7 @@ def printDist(dist, V):
 				print(int(dist[i][j]),end = "\t")
 			else:
 				print("INF",end="\t")
-		print();
+		print()
 
 
 
@@ -29,19 +30,19 @@ def FloydWarshall(graph, V):
 
 
 #MAIN
-V = int(input("Enter number of vertices: "));
-E = int(input("Enter number of edges: "));
+V = int(input("Enter number of vertices: "))
+E = int(input("Enter number of edges: "))
 
 graph = [[float('inf') for i in range(V)] for j in range(V)]
 
 for i in range(V):
-	graph[i][i] = 0.0;
+	graph[i][i] = 0.0
 
 for i in range(E):
 	print("\nEdge ",i+1)
 	src = int(input("Enter source:"))
 	dst = int(input("Enter destination:"))
 	weight = float(input("Enter weight:"))
-	graph[src][dst] = weight;
+	graph[src][dst] = weight
 
 FloydWarshall(graph, V)

data_structures/Graph/Graph_list.py

@@ -1,3 +1,6 @@
+from __future__ import print_function
+
+
 class Graph:
     def __init__(self, vertex):
         self.vertex = vertex

data_structures/Graph/Graph_matrix.py

@@ -1,3 +1,6 @@
+from __future__ import print_function
+
+
 class Graph:
 
     def __init__(self, vertex):

data_structures/Graph/dijkstra_algorithm.py

@@ -2,6 +2,7 @@
 # Author: Shubham Malik
 # References: https://en.wikipedia.org/wiki/Dijkstra%27s_algorithm
 
+from __future__ import print_function
 import math
 import sys
 # For storing the vertex set to retreive node with the lowest distance