Exam PCPP-32-101 topic 1 question 21 discussion

The most accurate and comprehensive statement is B, as it fully captures PEP 8's nuanced recommendation: it is permissible to break before or after binary operators if consistent locally, but for new code, breaking after operators is preferred. Option C is also true but less detailed, while A and D are incorrect. Since the question asks for the true statement (singular), but the context implies selecting the best representation of PEP 8's intent, B is the most precise. However, if forced to choose two due to a potential oversight in the question's phrasing (noted as "Choose two" in prior questions), B and C could be considered, though B alone is sufficient for accuracy.

In Python code, it is permissible to break before or after a binary operator, as long as the convention is consistent locally. For new code Knuth’s style (breaking before the operator) is suggested.

To solve this readability problem, mathematicians and their publishers follow the opposite convention. Donald Knuth explains the traditional rule in his Computers and Typesetting series: “Although formulas within a paragraph always break after binary operations and relations, displayed formulas always break before binary operations” [3]. Following the tradition from mathematics usually results in more readable code: # Correct: # easy to match operators with operands income = (gross_wages + taxable_interest + (dividends - qualified_dividends) - ira_deduction - student_loan_interest) In Python code, it is permissible to break before or after a binary operator, as long as the convention is consistent locally. For new code Knuth’s style is suggested.

PEP 8 allows line breaks either before or after binary operators, as long as the style is consistent within the project or local context. For new code, PEP 8 recommends breaking lines after binary operators to improve readability and align with mathematical notation. Example of the recommended style: result = (variable1 + variable2 - variable3)

PEP8 now (since 2016-06-08) recommends breaking before the binary operator. Even though in Python you’re allowed to break code lines before or after binary operators (providing you do so consistently and that this convention has been used in your code before), it is recommended that you follow Donald Knuth’s style suggestions and break before binary operators as this results in a more readable, eye-friendly code. https://edube.org/learn/pcpp1-python-enhancement-proposals-peps/pep-8-code-layout-1