How to implement guide with merging multiple dictionaries in python 3.11 and preserving unique keys
I've looked through the documentation and I'm still confused about This might be a silly question, but I'm trying to merge multiple dictionaries in Python 3.11 while ensuring that any unique keys from each dictionary are preserved without overwriting values. My dictionaries look something like this: ```python dict1 = {'a': 1, 'b': 2} dict2 = {'b': 3, 'c': 4} dict3 = {'c': 5, 'd': 6} ``` I want to merge these dictionaries so that the final result keeps all the unique keys and their values. If a key exists in multiple dictionaries, I want to store the values in a list. Here's what I have tried: ```python from collections import defaultdict merged_dict = defaultdict(list) for d in [dict1, dict2, dict3]: for key, value in d.items(): merged_dict[key].append(value) ``` However, when I print `merged_dict`, I get this output: ```python defaultdict(<class 'list'>, {'a': [1], 'b': [2, 3], 'c': [4, 5], 'd': [6]}) ``` This is almost what I want, but I realize I need to ensure that it only combines values for keys that overlap, and I want to handle this in a more elegant way without using `defaultdict`. Is there a better approach to achieve this? Also, Iām working with a performance warning when processing large dictionaries, which could be related to how I'm merging them. Any suggestions on best practices for merging in a more efficient manner would be appreciated! My development environment is Windows. Any help would be greatly appreciated! I'd really appreciate any guidance on this.