NameError: name '_name_' is not defined
时间: 2023-09-15 18:18:54 浏览: 44
这个错误通常是因为代码中写错了 `__name__` 的变量名,正确的写法是两个下划线,一个单词。
在 Python 中,`__name__` 是一个特殊的全局变量,表示当前模块的名称。当 Python 解释器执行一个脚本文件时,会把该脚本文件的 `__name__` 设为 `"__main__"`,表示该模块是主模块。如果在一个模块中写了 `if __name__ == "__main__":`,则表示这个模块是作为主程序运行的,会执行这个条件语句块中的代码。
相关问题
NameError: name '_Disk__name_' is not defined
This error occurs when you try to access a private attribute or method of a class in Python. In this case, it seems like you are trying to access the private attribute `__name__` of a class called `_Disk`.
In Python, any attribute or method that starts with two underscores is considered private and cannot be accessed from outside the class. However, Python does not actually prevent you from accessing these attributes or methods. Instead, it mangles the name by adding `_ClassName` before the attribute name, where `ClassName` is the name of the class.
So, in order to access the private attribute `__name__` of the `_Disk` class, you should use the mangled name `_Disk__name__`.
For example:
```
class _Disk:
def __init__(self, name):
self.__name__ = name
disk = _Disk("MyDisk")
print(disk._Disk__name__) # Output: "MyDisk"
```
Note that accessing private attributes or methods is generally not recommended as it can make your code harder to maintain and debug. If possible, you should use public attributes and methods instead.
NameError: name scores_mean_discrete is not defined
这个错误提示意味着你正在尝试使用一个名为 `scores_mean_discrete` 的变量,但它没有被定义或声明。这可能是因为你在代码中的某个地方没有正确地定义或赋值给这个变量。
你需要检查一下代码中是否存在以下情况:
- 变量名拼写错误
- 变量在使用之前没有被定义或声明
- 变量在使用之前被意外地删除或修改
如果你能提供更多的代码或上下文信息,我可以更加具体地帮助你解决这个问题。