Hello everybody, I'm Aya Bouchiha, today, we'll talk about 4 important dictionary methods.
clear()
clear(): this method lets you delete all the dictionary's items;
user = { "name": "Aya Bouchiha", "email":"developer.aya.b@gmail.com", } print(len(user)) # 2 user.clear() print(user) # {} print(len(user)) # 0 copy()
copy(): lets you get a copy of the specified dictionary.
user = { "name": "Aya Bouchiha", "email":"developer.aya.b@gmail.com", } admin = user.copy() # {'name': 'Aya Bouchiha', 'email': 'developer.aya.b@gmail.com'} print(admin) user['name'] = 'John Doe' # {'name': 'John Doe', 'email': 'developer.aya.b@gmail.com'} print(user) # {'name': 'Aya Bouchiha', 'email': 'developer.aya.b@gmail.com'} print(admin) setdefault(key, value)
setdefault(key, value(optional)): this method returns the value of the given key If It exists, otherwise, It creates a new item with the given key and value and returns its value.
user = { "name": "Aya Bouchiha", "email":"developer.aya.b@gmail.com", } print(user.setdefault('name', 'unknown')) # Aya Bouchiha print(user.setdefault('is_admin', 'False')) # False # {'name': 'Aya Bouchiha', 'email': 'developer.aya.b@gmail.com', 'is_admin': 'False'} print(user) values()
values(): this method returns all the given dictionary's values as a list.
products_prices_in_dollar = { "laptop":1000, "phone":150, "mouse":10, "keyboard":7 } print(products_prices_in_dollar.values()) # dict_values([1000, 150, 10, 7]) # converts from dollar to moroccan dirham # 1000+150+10+7 = 1167$ => 11670 moroccan dirhams sum_in_dirham = sum(products_prices_in_dollar.values()) * 10 # you have to pay 11670 dirhams print(you have to pay {sum_in_dirham} dirhams') Summary
- clear(): deletes all the dictionary's items;
- copy(): returns a copy of the specified dictionary.
- setdefault(): returns the value of the given key If It exists, otherwise, It create a new item with the given key and value and returns its value.
- values():returns all the given ditionary's values as a list
Reference
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email: developer.aya.b@gmail.com
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