advanced patterns When Using Python Dictionary Comprehensions for Filtering Data
I'm stuck trying to I'm attempting to set up I've been struggling with this for a few days now and could really use some help... I'm stuck on something that should probably be simple... I'm running into issues when trying to filter a dictionary using a dictionary comprehension in Python 3.9. I expected to create a new dictionary containing only the items that meet a specific condition, but I'm getting unexpected results. Here's the code snippet I used: ```python original_dict = { 'a': 1, 'b': 2, 'c': 3, 'd': 4 } # I want to filter out items where values are even filtered_dict = {k: v for k, v in original_dict.items() if v % 2 != 0} print(filtered_dict) ``` When I run this code, I see the following output: ``` {'a': 1, 'c': 3} ``` This is exactly what I expected. However, I then attempted to expand this logic to also include some additional conditions based on keys: ```python filtered_dict = {k: v for k, v in original_dict.items() if v % 2 != 0 and k != 'c'} print(filtered_dict) ``` Now, I'm expecting to get `{'a': 1}` since 'c' should be excluded. However, the output is: ``` {'a': 1} ``` This is correct, but I am confused why it behaves this way. I thought the filtering logic was straightforward. Could it be that using multiple conditions in the comprehension is causing some kind of logical behavior Iām not seeing? Are there best practices I should follow when filtering with more than one condition? Any insights would be appreciated! For reference, this is a production mobile app. My development environment is Ubuntu 22.04.