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Dictionaries Dictionaries are unordered collections of key-value pairs. Keys must be immutable (like strings, numbers, or tuples), while values can be of any data type.
my_dict = {"name": "Alice", "age": 30, "city": "[New York](./../new-york/)"}
print(my_dict["name"]]) # Accessing values using keys
Accessing a non-existent key raises a KeyError. Use the get() method for safer access:
print(my_dict.get("country", "Unknown")) # Returns "Unknown" if "country" is not found
Adding and modifying entries:
my_dict["occupation"]] = "Engineer"
my_dict["age"]] = 31
Iterating through dictionaries:
for key in my_dict:
print(key, my_dict[key]])
for key, value in my_dict.items():
print(key, value)
Other useful methods:
keys(): Returns a view object containing keys.values(): Returns a view object containing values.items(): Returns a view object containing key-value pairs as tuples.pop(key): Removes and returns the value associated with the key.popitem(): Removes and returns an arbitrary key-value pair.clear(): Removes all items.copy(): Creates a shallow copy.