This content originally appeared on DEV Community and was authored by Aya Bouchiha
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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To Contact Me:
email: developer.aya.b@gmail.com
telegram: Aya Bouchiha
Hope you enjoyed reading this post :)
This content originally appeared on DEV Community and was authored by Aya Bouchiha
Aya Bouchiha | Sciencx (2021-08-06T08:35:53+00:00) 4 Important Dictionary Methods. Retrieved from https://www.scien.cx/2021/08/06/4-important-dictionary-methods/
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