# Creating an empty dictionary
dict1 = {}
# Creating a dictionary with initial key-value pairs
dict2 = {
"name": "Alice",
"age": 25,
"city": "New York"
}
# Using the dict() constructor
dict3 = dict(name="Bob", age=30, city="Los Angeles")
print(dict1)
print(dict2)
print(dict3){}
{'name': 'Alice', 'age': 25, 'city': 'New York'}
{'name': 'Bob', 'age': 30, 'city': 'Los Angeles'}
person = {
"name": "Alice",
"age": 25,
"city": "New York"
}
print(person["name"])
print(person.get("age"))
# Accessing a non-existing key using get()
print(person.get("address", "Address not found"))Alice 25 Address not found
person = {
"name": "Alice",
"age": 25,
"city": "New York"
}
# Modifying existing key
person["age"] = 26
# Adding a new key-value pair
person["email"] = "[email protected]"
print(person){'name': 'Alice', 'age': 26, 'city': 'New York', 'email': '[email protected]'}
person = {
"name": "Alice",
"age": 25,
"city": "New York"
}
# Removing a key-value pair using del
del person["city"]
# Removing a key-value pair using pop()
email = person.pop("email", "Email not found")
print(person)
print("Email:", email){'name': 'Alice', 'age': 25}
Email: Email not found
person = {
"name": "Alice",
"age": 25,
"city": "New York"
}
for key in person:
print(key)name age city
person = {
"name": "Alice",
"age": 25,
"city": "New York"
}
for value in person.values():
print(value)Alice 25 New York
person = {
"name": "Alice",
"age": 25,
"city": "New York"
}
for key, value in person.items():
print(f"Key: {key}, Value: {value}")Key: name, Value: Alice Key: age, Value: 25 Key: city, Value: New York
person = {
"name": "Alice",
"age": 25,
"city": "New York"
}
# Check if key exists
if "name" in person:
print("Name exists in the dictionary.")
else:
print("Name does not exist in the dictionary.")Name exists in the dictionary.