<pre>

# 导入必要的库

import random

# 定义课程类

class Course:

def __init__(self, name, duration):

self.name = name

self.duration = duration

# 定义教室类

class Classroom:

def __init__(self, id):

self.id = id

self.available = True

# 定义教师类

class Teacher:

def __init__(self, name):

self.name = name

# 初始化数据

courses = [Course("数学", 2), Course("物理", 2), Course("化学", 2)]

classrooms = [Classroom(i) for i in range(1, 4)]

teachers = [Teacher("张老师"), Teacher("李老师"), Teacher("王老师")]

# 排课函数

def schedule_courses(courses, classrooms, teachers):

schedule = {}

for course in courses:

room = random.choice(classrooms)

while not room.available:

room = random.choice(classrooms)

room.available = False

teacher = random.choice(teachers)

schedule[course.name] = {"duration": course.duration, "classroom": room.id, "teacher": teacher.name}

return schedule

# 输出排课结果

print(schedule_courses(courses, classrooms, teachers))

</pre>