Category : | Sub Category : Posted on 2025-11-03 22:25:23
When working with dictionaries in Python, there are several key operations that you can perform to manipulate the data. One common operation is adding new key-value pairs to a dictionary. This can be done by simply assigning a value to a new key, like so: ```python my_dict = {"key1": "value1", "key2": "value2"} my_dict["key3"] = "value3" ``` In this example, we add a new key-value pair "key3": "value3" to the dictionary `my_dict`. Another common operation is accessing the value associated with a specific key. This can be done by using the key inside square brackets: ```python value = my_dict["key2"] print(value) # Output: value2 ``` Here, we access the value associated with the key "key2" in the dictionary `my_dict`. Additionally, you can iterate over the keys or values in a dictionary using a loop. For example, to iterate over the keys, you can use the `keys()` method: ```python for key in my_dict.keys(): print(key) # Output: key1, key2, key3 ``` Similarly, you can iterate over the values using the `values()` method: ```python for value in my_dict.values(): print(value) # Output: value1, value2, value3 ``` Dictionaries in Python also provide a method called `items()` that allows you to iterate over both keys and values simultaneously as tuples: ```python for key, value in my_dict.items(): print(f"Key: {key}, Value: {value}") ``` These are just a few examples of the operations you can perform with dictionaries in Python. By understanding how to manipulate dictionaries, you can effectively organize and retrieve data in your programs. also visit the following website https://www.subconsciousness.net
