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Unexpected ValueError when Using Python's List Comprehension with Conditional Logic

👀 Views: 13 đŸ’Ŧ Answers: 1 📅 Created: 2025-05-31
python list-comprehension valueerror Python

I'm working through a tutorial and I'm trying to debug I'm working on a personal project and I've been working on this all day and I'm working through a tutorial and I'm working with a `ValueError` when using list comprehension in Python 3.10, specifically when trying to filter out None values while transforming a list..... Here's the code I'm working with: ```python my_list = [1, 2, None, 4, None, 6] result = [x * 2 for x in my_list if x is not None] ``` I expected `result` to be `[2, 4, 8, 12]`, but instead, I'm getting a `ValueError` with the message: `ValueError: too many values to unpack (expected 2)`. I've double-checked the original data and ensured that there are no tuples or multiple values in the list. I've also tried changing the conditional logic to just `if x:` but that only skips zeros as well, which is not what I want. Is there something I'm missing with how list comprehensions handle None values or perhaps something else in my implementation? Any insights would be appreciated, as I've been exploring on this for a while! I've been using Python for about a year now. Is this even possible? The stack includes Python and several other technologies. My development environment is Windows 10. This is part of a larger CLI tool I'm building. Any ideas what could be causing this? I'm developing on Linux with Python. Am I approaching this the right way?