Question

我正在努力学习课程，有些事情正在重新开始，我得到了

"NameError: global name 'self' is not defined"

每个类字段都会发生同样的情况。你能帮我找到我做错了什么吗谢谢

代码：

class Assignment:
    def __init__(self, name, discription, deadline, grade, studentID):
        self.name = name
        self.studentID = studentID
        self.description = discription
        self.deadline = deadline
        self.grade = grade

    def __str__(self):
        return "studentID:" + self.studentID + "assignment name:" + self.name +" description:" + self.description + " deadline:" + self.deadline + " grade:" + self.grade

    def validation(self):
        errors= []
        if self.studendID == "":
            errors.append("No existing student ID.")  
        if self.description == "":
            errors.append("No existing description.")
        if self.deadline == "":
            errors.append("No existing deadline.")      
        if self.deadline == "":
            errors.append("No existing deadline.")    
        return errors

    @staticmethod
    def dummyAssignments():
        ret = []
        for studentID in range(100, 121):
            print "sda"
            a = Assignment(self, name, discription, deadline, grade, studentID)
            ret.append(a)            
        return ret   

def testAssigment():
    a = Assignment("","","","","")
    print a



testAssigment()   
print Assignment.dummyAssignments()

Answer 1

问题在于：

a = Assignment(self, name, discription, deadline, grade, studentID)

这是@staticmethod，因此self未定义。

实际上，除了studentID之外，没有定义这些值，只考虑它 -

Answer 2

在实例化课程时，您无需传递self。

Assignment(self, name, discription, deadline, grade, studentID)

应该是

Assignment(name, discription, deadline, grade, studentID)

错误告诉您，您正在尝试使用未在本地或全局范围内定义的var self。

Answer 3

dummyAssignments 静态方法只有studentID，但没有任何其他字段。

尝试为每个字段提供默认值：

class Assignment:
    def __init__(self, name='', discription='', deadline='', grade='', studentID =''):
        self.name = name
        self.studentID = studentID
        self.description = discription
        self.deadline = deadline
        self.grade = grade

    def __str__(self):
        return "studentID:" + self.studentID + "assignment name:" + self.name +" description:" + self.description + " deadline:" + self.deadline + " grade:" + self.grade

    def validation(self):
        errors= []
        if self.studendID == "":
            errors.append("No existing student ID.")  
        if self.description == "":
            errors.append("No existing description.")
        if self.deadline == "":
            errors.append("No existing deadline.")      
        if self.deadline == "":
            errors.append("No existing deadline.")    
        return errors

    @staticmethod
    def dummyAssignments():
        ret = []
        for studentID in range(100, 121):
            print "sda"
            a = Assignment(studentID=studentID)
            ret.append(a)            
        return ret   

def testAssigment():
    a = Assignment("","","","","")
    print a



testAssigment()   
print Assignment.dummyAssignments()

Answer 4

在你的课堂上宣布：

class Assignment:

将其更改为

class Assignment():

或

class Assignment(object):

NameError：全局名称'self'未定义-Classes

4 个答案: