在大连某大学实施排课系统时，我们面临着复杂的需求和严格的性能要求。为了满足这些需求，我们设计并实现了一个基于Python的排课系统。以下是系统的核心部分代码。

首先，定义课程类和教师类：

        class Course:
            def __init__(self, name, teacher, students):
                self.name = name
                self.teacher = teacher
                self.students = students

        class Teacher:
            def __init__(self, name, courses):
                self.name = name
                self.courses = courses
        

接着，定义教室类和时间表类：

        class Classroom:
            def __init__(self, name, capacity):
                self.name = name
                self.capacity = capacity

        class Schedule:
            def __init__(self):
                self.classrooms = {}
                self.courses = []
        

然后，实现排课算法。这里采用贪心算法来分配课程到教室和时间：

        def schedule_courses(courses, classrooms, schedule):
            for course in courses:
                assigned = False
                for classroom_name, classroom in classrooms.items():
                    if classroom.capacity >= len(course.students) and classroom_name not in schedule.classrooms:
                        schedule.classrooms[classroom_name] = course
                        schedule.courses.append(course)
                        assigned = True
                        break
                if not assigned:
                    print("无法为课程 {} 分配教室".format(course.name))
        

最后，调用上述函数来安排课程：

        if __name__ == "__main__":
            # 初始化数据
            courses = [Course("数学", "张老师", ["学生A", "学生B"]), Course("物理", "李老师", ["学生C", "学生D"])]
            teachers = [Teacher("张老师", ["数学"]), Teacher("李老师", ["物理"])]
            classrooms = {"教室1": Classroom("教室1", 30), "教室2": Classroom("教室2", 50)}
            schedule = Schedule()

            # 调用排课算法
            schedule_courses(courses, classrooms, schedule)

            # 输出结果
            for classroom, course in schedule.classrooms.items():
                print(f"课程 {course.name} 分配至 {classroom}")
        

以上是大连排课系统的源码实现，通过这个系统可以有效地管理和分配课程资源。