Built in methods in dictionary by nawfal.pptx

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1. Built in methods in dictionary Power by: Nawfal.L

2. Introduction to Dictionaries Definition :  A dictionary is an unordered collection of key-value pairs. Syntax :   { key1: value1, key2: value2,….} Example : my_dict = {'name': 'Alice', 'age': 25, 'city': 'New York'}

3. Common Dictionary Methods C lear() :   Removes all elements from the dictionary Example : my_dict.clear () Copy() :   Returns a shallow copy of the dictionary Example : new_dict = my_dict.copy ()

4.   Accessing Elements get(key ):   Returns the value for the specified key Example: value = my_dict.get ('name ') keys ():   Returns a view object of all keys Example: keys = my_dict.keys ()

5. Modifying Dictionaries update () : Updates the dictionary with the specified key-value pairs Example : my_dict.update ({'age': 26 }) pop(key ) :   Removes the element with the specified key Example : age = my_dict.pop ('age')

6. Iterating Through Dictionaries I tems() :   Returns a view object of key-value pairs Example : for key, value in my_dict.items (): print(key, value )

7.   Additional Methods P opitem () : Removes and returns the last inserted key-value pair . Example : last_item = my_dict.popitem () setdefault (key, default ) : Returns the value of the specified key. If the key does not exist, inserts the key with the specified value. Example : my_dict.setdefault ('country', 'USA')