Replace Values in Dictionary in Python

When working with dictionaries in Python, to replace a value in a dictionary, you can reassign a value to any key by accessing the item by key.

dictionary = {"apples":3, "bananas":4, "pears":5}

dictionary["apples"] = 6

print(dictionary)

#Output:
{"apples":6, "bananas":4, "pears":5}

In Python, dictionaries are a collection of key/value pairs separated by commas. When working with dictionaries, it can be useful to be able to easily access certain elements to replace their values.

We can easily replace values of keys in a Python dictionary.

To access the value of a specific key, you just need to call access it with the key name.

For example, if we have the following dictionary and want to get the value of the “apples” key, we can do so by accessing the item with the key “apples”.

dictionary = {"apples":3, "bananas":4, "pears":5}

print(dictionary["apples"])

#Output:
3

Then, if you want to replace the value and reassign a new value to a key, you can just use regular assignment.

Below is an example in Python of how to reassign and replace a value in a dictionary.

dictionary = {"apples":3, "bananas":4, "pears":5}

dictionary["apples"] = 6

print(dictionary)

#Output:
{"apples":6, "bananas":4, "pears":5}

Changing Key Names in Python Dictionary

If you are want to change the name of a key in a dictionary in Python, then you can use the dictionary pop() function.

Below shows you an example of how you can rename a key in a dictionary in Python.

dictionary = {"apples":3, "bananas":4, "pears":5}

dictionary["watermelon"] = dictionary.pop("apples")

print(dictionary)

#Output:
{"bananas":4, "pears":5, "watermelon":3}

Hopefully this article has been useful for learning how to replace values in dictionaries using Python.