def import_courses_from_file(file_name): with open(file_name, 'r',encoding='utf-8') as file: for line in file: data = line.strip().split(',') if len(data) >= 4: course_info.append({'课程编号': data[0], '课程名称': data[1],'课程学分': data[2],'上课时间':data[3]}) else: print("错误：行数据不完整，跳过该行") print(course_info) import_students_from_file(r"C:\Users\Lenovo\Desktop\文件导入学生信息.txt" json格式保存正确但信息导入失败，修改此代码

def import_courses_from_file(file_name):
course_info = []
with open(file_name, 'r', encoding='utf-8') as file:
for line in file:
data = line.strip().split(',')
if len(data) >= 4:
course_info.append({'课程编号': data[0], '课程名称': data[1], '课程学分': data[2], '上课时间': data[3]})
else:
print("错误：行数据不完整，跳过该行")
return course_info

course_info = import_courses_from_file(r"C:\Users\Lenovo\Desktop\文件导入学生信息.txt")
print(course_info)

相关问题

class Course: courses = [ Course('Advanced Mathematics', 4, 'Monday 8:30-10:10'), Course('College English', 3, 'Tuesday 2:30-4:10'), Course('Computer programming', 4, 'Wednesday 10:30-12:10'), Course('Computer Design', 3, 'Thursday 4:30-6:10') ] def __init__(self, name, credit, time): self.name = name self.credit = credit self.time = time self.courses = [] def add_course(self,course): self.courses.append(course) def print_courses(self): for course in self.courses: print(course.name) def choose_class(): print(''' 1.'Advanced Mathematics', 'credit:4', 'Monday 8:30-10:10')) 2.'College English', 'credit:3', 'Tuesday 2:30-4:10' 3.'Computer programming', 'credit:4', 'Wednesday 10:30-12:10' 4.'Computer Design', 'credit:3', 'Thursday 4:30-6:10''') ch = int(input('Please choose the class that you want:')) if ch == 1: Course.add_course(Course('Advanced Mathematics', 4, 'Monday 8:30-10:10')) elif ch == 2: Course.add_course(Course('College English', 3, 'Tuesday 2:30-4:10')) elif ch == 3: Course.add_course(Course('Computer programming', 4, 'Wednesday 10:30-12:10')) elif ch == 4: Course.add_course(Course('Computer Design', 3, 'Thursday 4:30-6:10')) Course.choose_class() Course.print_courses()

这段代码定义了一个课程类 `Course`，其中包含课程名称、学分和上课时间等属性，以及添加课程和打印已选课程的方法。其中 `courses` 列表包含了四门课程的信息。

在 `choose_class()` 函数中，通过打印课程信息列表，等待用户输入选择的课程，并根据用户的选择调用 `add_course()` 方法将该课程添加到已选课程列表中。

最后，调用 `print_courses()` 方法打印已选课程列表。但是，需要注意的是 `choose_class()` 函数中的最后一行 `Course.choose_class()` 应该是多余的，应该删除。

class Course: def __init__(self, name, credit, time): self.name = name self.credit = credit self.time = time self.courses = [] def add_course(self,course): self.courses.append(course) def print_courses(self): for course in self.courses: print(course.name) def choose_class(): print(''' 1.'Advanced Mathematics', 'credit:4', 'Monday 8:30-10:10')) 2.'College English', 'credit:3', 'Tuesday 2:30-4:10' 3.'Computer programming', 'credit:4', 'Wednesday 10:30-12:10' 4.'Computer Design', 'credit:3', 'Thursday 4:30-6:10''') ch = int(input('Please choose the class that you want:')) if ch == 1: Course.add_course(Course('Advanced Mathematics', 4, 'Monday 8:30-10:10')) elif ch == 2: Course.add_course(Course('College English', 3, 'Tuesday 2:30-4:10')) elif ch == 3: Course.add_course(Course('Computer programming', 4, 'Wednesday 10:30-12:10')) elif ch == 4: Course.add_course(Course('Computer Design', 3, 'Thursday 4:30-6:10'))

这段代码定义了一个课程类 `Course`，包含了课程名称、学分和上课时间等属性，以及添加课程和打印课程的方法。另外还定义了一个 `choose_class()` 函数，让用户选择课程并添加到课程列表中。

但是，这段代码存在几个问题：

1. `courses` 属性应该在类的外部定义，而不是在 `__init__` 方法中定义。否则每次实例化对象时都会创建一个新的空列表，而无法保留已经添加的课程。
2. 在 `choose_class()` 函数中，应该先创建一个 `Course` 对象，再将其添加到课程列表中。而不是直接调用 `add_course()` 方法，因为该方法需要先获取对应的 `Course` 对象。
3. 在 `choose_class()` 函数中，应该加上异常处理，防止用户输入不合法的选项。

修改后的代码如下：

class Course:
    courses = []

    def __init__(self, name, credit, time):
        self.name = name
        self.credit = credit
        self.time = time
        
    def add_course(self,course):
        self.courses.append(course)
    
    def print_courses(self):
        for course in self.courses:
            print(course.name)

def choose_class():
    print('''1. 'Advanced Mathematics', 'credit:4', 'Monday 8:30-10:10'
2. 'College English', 'credit:3', 'Tuesday 2:30-4:10'
3. 'Computer programming', 'credit:4', 'Wednesday 10:30-12:10'
4. 'Computer Design', 'credit:3', 'Thursday 4:30-6:10' ''')
    ch = input('Please choose the class that you want:')
    try:
        ch = int(ch)
        if ch == 1:
            course = Course('Advanced Mathematics', 4, 'Monday 8:30-10:10')
        elif ch == 2:
            course = Course('College English', 3, 'Tuesday 2:30-4:10')
        elif ch == 3:
            course = Course('Computer programming', 4, 'Wednesday 10:30-12:10')
        elif ch == 4:
            course = Course('Computer Design', 3, 'Thursday 4:30-6:10')
        else:
            raise ValueError
        Course.courses.append(course)
    except ValueError:
        print("Invalid option")

choose_class()