Python - Accessing Nested Dictionaries

We are given a nested dictionary and our task is to access the value inside the nested dictionaries in Python using different approaches. In this article, we will see how to access value inside the nested dictionaries in Python.

Easiest method to access Nested dictionary is by using keys. If you know the structure of nested dictionary, this method is useful.

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Access Nested Dictionaries Using get() Method

In this example, values in the nested market dictionary are accessed using get()method. The color is printed by chaining get() calls with the respective keys for fruits and apple, providing a safe way to handle potential missing keys.

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Explanation:

• nested_dict.get("fruit", {}): Get the dictionary associated with key "fruit". If "fruit" is not found, it returns an empty dictionary ({}).
• .get("apple", {}): Get the dictionary for key "apple" inside the "fruit" dictionary.
• .get("color"): Get the value for key "color" inside the "apple" dictionary. Returns None if "color" does not exist.

Access Nested Dictionary - using for loop

For Loop can be used when you don't know the structure of dictionary or when keys are dynamically determined.

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Explanation:

• For loop iterates through each key in the keys list.
• current = current.get(key, {}): Get the value associated with current key. If the key is missing, it returns to an empty dictionary ({}) to prevent errors.

Access Nested Dictionaries Using Recursive Function

In this example, a recursive function named get_nd is used to retrieve the color from the nested market dictionary. The function recursively navigates through the dictionary hierarchy, utilizing the get() method to handle missing keys.