how to loop through a nested dictionary with python

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certainly! looping through a nested dictionary in python can be quite useful, especially when dealing with complex data structures. a nested dictionary is essentially a dictionary where the values can be other dictionaries. here's a step-by-step tutorial on how to iterate through such structures.

step 1: understanding nested dictionaries

a nested dictionary looks something like this:



step 2: looping through the nested dictionary

you can use nested loops to access each key and value within the nested dictionary. here’s how to do it:

1. **outer loop**: iterate over the keys of the outer dictionary (e.g., `person1`, `person2`).
2. **inner loop**: for each key, iterate over the keys of the inner dictionary (e.g., `name`, `age`, `city`).

example code

here’s an example of how to loop through the nested dictionary and print each person's information:



output

when you run this code, you will get the following output:



step 3: accessing specific values

if you want to access specific values in the nested dictionary, you can do so by directly referencing the keys. for example:



conclusion

looping through a nested dictionary allows you to access complex data structures easily. by using nested loops, you can extract and manipulate the data as needed. this technique is particularly useful in data processing, configuration management, and working with json-like structures in python.

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