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Coddy Python 여정의 Logic & Flow 섹션에 포함된 레슨 — 78개 중 44번째.

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쉬움

하나의 인자 course (문자열)를 받는 list_students_by_course라는 이름의 함수를 만드세요. 이 함수는 다음을 수행해야 합니다:

student_records 딕셔너리를 반복하여 지정된 course에 등록된 모든 학생을 찾습니다.
해당 과목에 등록된 학생들의 이름 리스트를 반환합니다.
해당 과목에 등록된 학생이 없으면 빈 리스트를 반환합니다.

코드의 맨 아래에 다음 코드 블록을 추가(또는 교체)하세요:

add_student("Alice", 20, ["Math", "Physics"])
add_student("Bob", 22, ["Math", "Biology"])
add_student("Diana", 23, ["Chemistry", "Physics"])
print(list_students_by_course("Math"))  # Should return ["Alice", "Bob"]
print(list_students_by_course("Physics"))  # Should return ["Alice", "Diana"]
print(list_students_by_course("Biology"))  # Should return ["Bob"]
print(list_students_by_course("History"))  # Should return an empty list

직접 해보기

student_records = {}

def add_student(name, age, courses):
    if name in student_records:
        print(f"Student '{name}' already exists.")
        return
    student_records[name] = {"age": age, "grades": set(), "courses": set(courses)}
    print(f"Student '{name}' added successfully.")

def add_grade(name, grade):
    if name not in student_records:
        print(f"Student '{name}' not found.")
        return
    student_records[name]["grades"].add(grade)
    print(f"Grade {grade} added for student '{name}'.")

def is_enrolled(name, course):
    if name not in student_records:
        print(f"Student '{name}' not found.")
        return False
    return course in student_records[name]["courses"]

def calculate_average_grade(name):
    if name not in student_records:
        print(f"Student '{name}' not found.")
        return None
    grades = student_records[name]["grades"]
    if not grades:
        return 0
    return sum(grades) / len(grades)


add_student("Alice", 20, ["Math", "Physics"])
add_student("Bob", 22, ["Biology", "Chemistry"])
add_grade("Alice", 90)
add_grade("Alice", 85)
add_grade("Bob", 75)
print(calculate_average_grade("Alice"))  # Should return 87.5
print(calculate_average_grade("Bob"))  # Should return 75.0
print(calculate_average_grade("Charlie"))  # Non-existent student, should print message and return None
print(calculate_average_grade("Alice"))  # Should return 87.5 again