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  • Python复杂对象转json

    Python复杂对象转json

    python不常用, 出了岔子, 想将几个实体转成json, 但是因为实体列表里的实体里面套实体列表...直接使用json.dumps(obj)会出现一些错误, 只能给里面的列表添加的时候调用object.__dict__, 但是外层使用object.__dict__就会报错, 很迷, 大概就是里面的元素无法序列化, 或者是某一个属性无法找到对应的"key".

    嗐, 直接上代码:

    # 其实这么写就可以了=.=
    json.dumps(obj=self.students,
                default=lambda x : x.__dict__, sort_keys=False, indent=2)
    

    这里是一个小Demo:

    import json
    
    class Course:
    
        def __init__(self, courseNum, courseName, courseCredit):
            self.CourseNum = courseNum
            self.CourseName = courseName
            self.CourseCredit = courseCredit
    
    class Student:
    
        def __init__(self, studentNum, studentName, *courses):
            self.StudentNum = studentNum
            self.StudentName = studentName
            self.Courses = []
            self.Courses += courses
    
    class IStudentResp(object):
    
        def AddStudent(self, student):
            pass
    
        def SelectStudent(self, studentNum):
            pass
    
        def DeleteStudent(self, studentNum):
            pass
    
        def AddCourse(self, studentNum, course):
            pass
    
        def SelectCourse(self, studentNum, courseNum):
            pass
    
        def DeleteCourse(self, studentNum, courseNum):
            pass
    
    class StudentResp(IStudentResp):
        students = []
        def __init__(self):
            pass
    
        def AddStudent(self, student):
            self.students.append(student)
    
        def SelectStudent(self, studentNum):
            for stu in self.students:
                if studentNum == stu.StudentNum:
                    return stu
    
        def DeleteStudent(self, studentNum):
            self.students.remove(self.SelectStudent(studentNum))
    
        def AddCourse(self, studentNum, course):
            self.SelectStudent(studentNum).Courses.append(course)
    
        def SelectCourse(self, studentNum, courseNum):
            for stu in self.students:
                if stu.StudentNum == studentNum:
                    for course in stu.Courses:
                        if course.CourseNum == courseNum:
                            return course
    
        def DeleteCourse(self, studentNum, courseNum):
            self.SelectStudent(studentNum).Courses
                .remove(self.SelectCourse(studentNum, courseNum))
    
        def show(self):
            print(json.dumps(obj=self.students,
                default=lambda x : x.__dict__, sort_keys=False, indent=2))
            # print(json.dumps(self.students))
    
    if __name__ == "__main__":
        sp = StudentResp()
        sp.AddStudent(Student("001", "001", Course("A", "A", 2), Course("A", "A", 2)))
        sp.AddStudent(Student("002", "001", Course("A", "A", 2), Course("A", "A", 2)))
        sp.AddStudent(Student("003", "001", Course("A", "A", 2), Course("A", "A", 2)))
        sp.AddStudent(Student("004", "001", Course("A", "A", 2), Course("A", "A", 2)))
        sp.AddCourse("001", Course("A", "A", 2))
        sp.AddCourse("001", Course("A", "A", 2))
        sp.AddCourse("001", Course("A", "A", 2))
        sp.AddCourse("001", Course("A", "A", 2))
    
        sp.show()
    
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  • 原文地址:https://www.cnblogs.com/donpangpang/p/12741309.html
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