Homework: Student Grade Report

作业: 学生成绩报告

≈ 45 min · python-lists python-functions python-loops · Open in WolfCode

Chapter 5 capstone — pulls together lists, loops, conditionals, functions. Five functions, one assembler.

The 5 functions

average(scores) — mean; guard for empty
highest(scores) — max; guard for empty
pass_count(scores, threshold=60) — count passing scores
letter_grade(avg) — Ch.2 elif chain
report(name, scores) — orchestrator, calls all four

The shape

The orchestrator — see how it composes the helpers

def average(scores):
    if not scores:
        return 0.0
    return sum(scores) / len(scores)

def highest(scores):
    if not scores:
        return 0
    return max(scores)

def pass_count(scores, threshold=60):
    return len([s for s in scores if s >= threshold])

def letter_grade(avg):
    if avg >= 90: return "A"
    elif avg >= 80: return "B"
    elif avg >= 70: return "C"
    elif avg >= 60: return "D"
    else: return "F"

def report(name, scores):
    avg = average(scores)
    return {
        "name": name,
        "average": round(avg, 2),
        "highest": highest(scores),
        "pass_count": pass_count(scores),
        "grade": letter_grade(avg),
    }

print(report("Ada Lovelace", [85, 92, 78, 95, 88]))
print(report("Edge Case", []))

Loading Python runtime (~5 MB, one-time)…

Acceptance criteria

All 8 tests pass
report calls at least 3 of the 4 helpers
average survives empty input
All average values rounded to 2 decimals