Why does my dictionary comprehension throw a KeyError when filtering based on nested dictionary values in Python 3.9?
I'm not sure how to approach I'm working on a personal project and I'm attempting to set up I'm trying to figure out After trying multiple solutions online, I still can't figure this out..... I've hit a wall trying to I've been banging my head against this for hours..... I tried several approaches but none seem to work. I'm trying to filter a dictionary in Python 3.9 based on values stored in a nested dictionary structure, but I'm running into a `KeyError` that I need to seem to resolve. I have a main dictionary where each key points to another dictionary containing user data. I want to filter this main dictionary to include only users who have a specific attribute set to a certain value within their nested dictionary. Here’s the structure of my main dictionary: ```python users = { 'user1': {'age': 25, 'status': 'active'}, 'user2': {'age': 30, 'status': 'inactive'}, 'user3': {'age': 22, 'status': 'active'}, } ``` I want to create a new dictionary that only includes users with status 'active'. I tried the following dictionary comprehension: ```python active_users = {k: v for k, v in users.items() if v['status'] == 'active'} ``` However, I keep getting a `KeyError: 'status'` when I run this. I've double-checked that all nested dictionaries have the 'status' key, but I suspect there might be a case where a user entry is missing this key, causing the scenario. To handle this, I attempted to add an additional check: ```python active_users = {k: v for k, v in users.items() if 'status' in v and v['status'] == 'active'} ``` But I’m still working with the same behavior. I also tried wrapping the filter logic in a try-except block, but that didn’t help because I’d still like to include as many valid entries as possible. Can anyone guide to understand why the `KeyError` is occurring and how I can safely filter this dictionary without running into this scenario? Has anyone else encountered this? Thanks in advance! For context: I'm using Python on macOS. Hoping someone can shed some light on this. I'm developing on macOS with Python. Hoping someone can shed some light on this. Am I missing something obvious? Could someone point me to the right documentation?