Which of the following is a recommended practice for comments in Python?

• A. Comments should always be long and detailed
• B. Comments should explain non-obvious code
• C. Comments should be avoided in production code
• D. Comments should repeat the code

Answer: (B)

The recommended practice for comments in Python is to ensure they explain non-obvious code. This means that comments should provide clarity and insight into the logic or purpose of code segments that may not be immediately understandable to someone reading the code for the first time. The aim of comments is to enhance code readability and maintainability, making it easier for developers to understand what the code is doing and why certain decisions were made.

Using comments to clarify non-obvious aspects of the code facilitates collaboration among developers, as well as aids in future code revisions or debugging. Clear and concise explanations of complex logic or algorithms can save time and reduce confusion in team environments.

Other practices, such as making comments excessively long and detailed or repeating the code, do not align with the best practices in software development. Long comments can clutter the code and may overwhelm readers, while simply repeating what the code does adds no value. Comments should complement the code, not duplicate its functionality. Avoiding comments entirely in production code is also not advisable, as it deprives readers of valuable context about the code's purpose and logic.