Added dictionary to Python

Author: ChucklesDroid

Dictionaries/dictionary.py

@@ -0,0 +1,34 @@
+#  Dictionary is collection of key-value pairs. Dictionary is ordered(from 
+#  python 3.6 onwards), changeable and does not contain any duplicates
+
+capitals = {'US':'Washington',
+            'UK':'London',
+            'Germany':'Berlin',
+            'South Korea':'Seoul'}
+print(capitals)
+
+#  To print value we will make use of specific key
+print(capitals['US'])
+#  print(capitals['France']) # This will generate error as this not defined in dictionary
+#  So to overcome this we will make use of .get
+print(capitals.get('France')) #This will give output 'NONE'
+
+#  To add a new key to dictionary we will make use of update
+capitals.update({'France':'Paris'})
+print("Dictionary was updated :",end="")
+print(capitals)
+
+#  To change an existing value of a key we make use of update
+capitals.update({'US':'Chicago'})
+print("Value for Washington was updated",end="")
+print(capitals)
+
+#  To remove a particular key-value pair we will make use of pop
+capitals.pop('US')
+print("Value popped is US: ",end="")
+print(capitals)
+
+#  To clear a list make use of clear
+capitals.clear()
+print("Dictionary Cleared: ",end="")
+print(capitals)