# Khai báo dict bằng dấu {}
dict_demo = {"first_name": "Long", "last_name": "Vo", "age": 24}
print(dict_demo)  # {'first_name': 'Long', 'last_name': 'Vo', 'age': 24}
 
# Lấy giá trị của key
print(dict_demo["first_name"])  # Long
print(dict_demo.get("age"))  # 24
print(dict_demo.get("hometown"))  # None
print(dict_demo.get("hometown", "Ca Mau"))  # Ca Mau
print(dict_demo)  # {'first_name': 'Long', 'last_name': 'Vo', 'age': 24}
 
# Thêm key-value mới
dict_demo["hometown"] = "Ca Mau"
print(dict_demo)  # {'first_name': 'Long', 'last_name': 'Vo', 'age': 24, 'hometown': 'Ca Mau'}
 
# Xóa key-value
print(dict_demo.pop('hometown')) # Ca Mau
print(dict_demo)  # {'first_name': 'Long', 'last_name': 'Vo', 'age': 24}
 
del dict_demo["age"]
print(dict_demo)  # {'first_name': 'Long', 'last_name': 'Vo'}
 
# Lấy danh sách keys
print(dict_demo.keys())  # dict_keys(['first_name', 'last_name'])
 
# Lấy danh sách values
print(dict_demo.values())  # dict_values(['Long', 'Vo'])
 
# Lấy danh sách key-value
print(dict_demo.items())  # dict_items([('first_name', 'Long'), ('last_name', 'Vo')])
 

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