In Python, the use of lambda functions is encouraged for short, simple operations, especially in functional programming contexts. However, when the lambda is assigned to a variable, it loses its anonymous nature, and using def for named functions becomes a more readable and conventional choice, particularly for more complex scenarios.

In essence, while the code is functionally/technically accurate, some developers might argue that, for readability and adherence to PEP guidelines, using def for named functions. It's a matter of coding style and preference rather than a strict correctness issue.