How Can I Recursively Iterate and Print Key-Value Pairs from a Nested Dictionary?

Iterating Through Nested Dictionary Values

In this programming scenario, our goal is to traverse a potentially multi-layered dictionary structure and print key-value pairs where the values are not nested dictionaries themselves. If a value happens to be a nested dictionary, we need to recursively explore it and print its key-value pairs as well.

To achieve this, simple iteration techniques may not suffice. Instead, we can harness the power of recursion. Here's a revised function that incorporates recursion to effectively handle nested dictionaries of any depth:

def myprint(d):
    for k, v in d.items():
        if isinstance(v, dict):
            myprint(v)
        else:
            print("{0} : {1}".format(k, v))

By calling myprint with the initial dictionary, the function enters a recursive loop. It visits each key-value pair and checks if the value is a dictionary. If it is, the function calls itself with the value dictionary as the new input, effectively drilling down into any nested levels.

If the value is not a dictionary, the function simply prints the current key-value pair. This process continues until all levels of the dictionary have been traversed.

Here's a demonstration using a sample nested dictionary:

d = {
    "xml": {
        "config": {
            "portstatus": {"status": "good"},
            "target": "1",
        },
        "port": "11",
    }
}

myprint(d)

This will produce the desired output:

xml : {config: {portstatus: {status: good}, target: 1}, port: 11}
config : {portstatus: {status: good}, target: 1}
portstatus : {status: good}
status : good
target : 1
port : 11

As you can see, the function recursively iterates through the dictionary, printing all non-nested values and drilling down into nested dictionaries until it reaches the leaf nodes.

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