Added Dictionary practice tutorial

Author: majid shahbaz

src/datastructures/dict/dict_examples.py

@@ -110,4 +110,4 @@ def tuple_break(student_tuple):
 #Using comprehension
 rev = {v:k for k,v in original.items()}
 print(f"Reverted dict => {rev}")
-#Reverted dict => {1: 'a', 2: 'b', 3: 'c'}
+#Reverted dict => {1: 'a', 2: 'b', 3: 'c'}