Web Reference: Jul 11, 2025 · This is the simplest way to add or update a key-value pair in a dictionary. We access the dictionary by specifying the key inside square brackets and assign the corresponding value. To update this dict with a single new key and value, you can use the subscript notation (see Mappings here) that provides for item assignment: We can also update the dict with multiple values efficiently as well using the update method. Aug 6, 2024 · Learn how to append key-value pairs in a Python dictionary using methods such as square bracket notation, .update () for bulk additions, and .setdefault () for conditional inserts.
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