错误NameError: name 'xxx' is not defined总结 情况一:要加双引号(" ")或者(' ')而没加 情况二:字符缩进格式的问题 情况三:`if __name__=='__main__' :` 没有和`class类`进行对齐 情况四:NameError: name 'file' is not defined 情况五:NameError: name '模块' is not defined 情况六:NameE...
class MainHandler(webapp.RequestHandler): File "main.py", line 38, in MainHandler self.writeOut(template.render(path, template_data)) NameError: name 'self' is not defined 我究竟做错了什么?
class MyClass(object): def __init(self): pass i=12345 def f(self): return "hello word" def main(): passif __name__=='__main__' : print(MyClass().f())
In [82]: p.selfDemo() My Demo In [83]: In [83]: class MyClass002: ...: def selfDemo(self): ...: print self ...: In [84]: p=MyClass002() In [85]: p.selfDemo() <__main__.MyClass002 instance at 0x7f308a0394d0> In [86]:...
In [5]: class Human(object): ...: def __init__(self, weight): ...: sel...
在上面的示例中，我们在定义 MyClass 类时使用了 self 参数，并在其中访问了类实例的属性 self.name。
下面的内容可以解释这个问题。也许你会想试试这个？
Python的错误其实也是class,所有的错误类型都继承自BaseException,所以在使用except时需要注意的是,它不但捕获该类型的错误,还把其子类也“一网打尽”。比如: 1 2 3 4 5 6 try: foo() exceptValueError as e: print('ValueError') exceptUnicodeError as e: ...
Instance attributes are defined in the constructor. The following example defines instance attributes name and age in the constructor. Example: Instance Attributes Copy class Student: schoolName = 'XYZ School' # class attribute def __init__(self): # constructor self.name = '' # instance ...
NameError: name ‘self’ is not defined The “self” variable holds information about an object inside a class. All of the values that have been assigned to an object are available in the “self” variable. “self” must be passed as an argument if you want to use it in a method. ...