错误：“返回”超出函数范围

错误：“返回”超出函数范围

Why??

 def get_all_students(self):
    database = open(self.database_path, 'r')
    list_of_students = list()
    for idx, l in enumerate(database.readlines()):
        params = list()
        params.append(idx)
        params += l.split(self.data_delimiter)
        student = Student(*self.item_un_escape(params))
        list_of_students.append(student)
    return list_of_students

编辑：我将发布课程的其余部分，但我很确定它的缩进正确。似乎找不到错误，我敢打赌这可能是一些愚蠢的事情。抱歉，第一次用 python 编码，但这个错误已经困扰我大约一个小时了！哈哈

Edit2：它在 params.append(idx) 上抛出错误，说意外缩进？

from student import Student

database_path = 'C:/Users/Alan/Desktop/flask/flask/app/database'


class Database(object):
    data_delimiter = ','

    @staticmethod
    def escape_new_lines(value):
        if type(value) == str:
            value = value.replace('\n', '@n-nl@')
            value = value.replace('\r', '@r-nl@')
        return value

    @staticmethod
    def un_escape_new_lines(value):
        if type(value) == str:
            value = value.replace('@n-nl@', '\n')
            value = value.replace('@r-nl@', '\r')
        return value

    def __init__(self, database_path=database_path):
        self.database_path = database_path

    def get_all_students(self):
        database = open(self.database_path, 'r')
        list_of_students = list()
        for idx, l in enumerate(database.readlines()):
            params = list()
            params.append(idx)
            params += l.split(self.data_delimiter)
            student = Student(*self.item_un_escape(params))
            list_of_students.append(student)
        return list_of_students

您发布的代码很好。您可能的错误是由于在 return 语句之前缺少缩进。EDIT:正如@Anonymous 在评论中指出的那样，另一种可能性是您将制表符缩进与空格缩进混合在一起。检查你的缩进。