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Finally a clean way to update dictionaries in python if you're unsure all keys exist

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BBBischof
Last edited Dec 18, 2017
Created on Dec 18, 2017

This example demonstrates a manual approach to updating dictionary values in Python when keys may or may not already exist, using conditional logic to check membership with `if i not in your_dict`. The code iterates over an iterator and assigns either a new value or the existing value plus an increment, handling both direct assignments from iterators and values sourced from a separate dictionary. It includes a concrete frequency-counting scenario with a `letters` list, producing a tally like `{'a': 3, 'b': 2, 'c': 1}`. The example

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