实现课程推荐函数

def solve():
    from pyodide.http import open_url
    from io import StringIO
    import pandas as pd
    courses_csv = open_url(____).read()
    courses = pd.read_csv(StringIO(____))
    def recommend_courses(____):
        result = courses[(____) & (____)]
        result = result.sort_values(____).head(____)
        return result[['____', '____', '____']].to_dict(____)
    recs = recommend_courses(____)
    for r in recs:
        print(____)