1. typo fix {playfair_cipher.py, AVL.py}

2. Corrected Logic {AVL.py, 104-107}
3. Removed unnecessary semicolons {BellmanFord.py, Dijkstra.py}

Author: ashutoshcp

ciphers/playfair_cipher.py

@@ -13,8 +13,8 @@ def chunker(seq, size):
 
 def prepare_input(dirty):
     """
-    Prepare the plaintext by uppcasing it 
-    and seperating repeated letters with X's
+    Prepare the plaintext by up-casing it
+    and separating repeated letters with X's
     """
 
     dirty = ''.join([c.upper() for c in dirty if c in string.ascii_letters])
@@ -38,7 +38,7 @@ def prepare_input(dirty):
 
 def generate_table(key):
 
-    # I and J are used interchangably to allow
+    # I and J are used interchangeably to allow
     # us to use a 5x5 table (25 letters)
     alphabet = "ABCDEFGHIKLMNOPQRSTUVWXYZ"
     # we're using a list instead of a '2d' array because it makes the math 

data_structures/AVL/AVL.py

@@ -1,6 +1,6 @@
-'''
-A AVL tree
-'''
+"""
+An AVL tree
+"""
 from __future__ import print_function
 
 
@@ -101,10 +101,10 @@ def rebalance(self, node):
                 if height_left > height_right:
                     left_child = n.left
                     if left_child is not None:
-                        h_right = (right_child.right.height
-                                    if (right_child.right is not None) else 0)
-                        h_left = (right_child.left.height
-                                    if (right_child.left is not None) else 0)
+                        h_right = (left_child.right.height
+                                    if (left_child.right is not None) else 0)
+                        h_left = (left_child.left.height
+                                    if (left_child.left is not None) else 0)
                     if (h_left > h_right):
                         self.rotate_left(n)
                         break

data_structures/Graph/BellmanFord.py

@@ -7,11 +7,11 @@ def printDist(dist, V):
 			print(i,"\t",int(dist[i]),end = "\t")
 		else:
 			print(i,"\t","INF",end="\t")
-		print();
+		print()
 
 def BellmanFord(graph, V, E, src):
 	mdist=[float('inf') for i in range(V)]
-	mdist[src] = 0.0;
+	mdist[src] = 0.0
 
 	for i in range(V-1):
 		for j in range(V):
@@ -35,13 +35,13 @@ def BellmanFord(graph, V, E, src):
 
 
 #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 = [dict() for j in range(E)]
 
 for i in range(V):
-	graph[i][i] = 0.0;
+	graph[i][i] = 0.0
 
 for i in range(E):
 	print("\nEdge ",i+1)

data_structures/Graph/Dijkstra.py

@@ -7,7 +7,7 @@ def printDist(dist, V):
 			print(i,"\t",int(dist[i]),end = "\t")
 		else:
 			print(i,"\t","INF",end="\t")
-		print();
+		print()
 
 def minDist(mdist, vset, V):
 	minVal = float('inf')
@@ -25,7 +25,7 @@ def Dijkstra(graph, V, src):
 
 	for i in range(V-1):
 		u = minDist(mdist, vset, V)
-		vset[u] = True;
+		vset[u] = True
 
 		for v in range(V):
 			if (not vset[v]) and graph[u][v]!=float('inf') and mdist[u] + graph[u][v] < mdist[v]:
@@ -38,20 +38,20 @@ def Dijkstra(graph, V, src):
 
 
 #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
 
 gsrc = int(input("\nEnter shortest path source:"))
 Dijkstra(graph, V, gsrc)