name 'file_name' is not defined

这个错误通常是因为你在代码中使用了`__file__`变量，但是这个变量只有在脚本被执行时才会被定义。如果你在交互式环境中使用这个变量，就会出现这个错误。解决这个问题的方法有两种：

1.将代码放在脚本中执行，而不是在交互式环境中执行。

2.在代码中添加一个判断，以确保`__file__`变量已经被定义。例如：

if __name__ == '__main__':
    file_name = __file__

这样，当你在交互式环境中执行代码时，`file_name`变量不会被定义，因为`__name__`变量的值不是`'__main__'`。

相关问题

name '__file__' is not defined

The error message "'__file__' is not defined" typically occurs when you try to access the special Python variable __file__ in the wrong context.

The __file__ variable is used to obtain the path of the current file being executed. It is only defined when a script is executed directly as the main program, and not when it is imported as a module.

Here are some common situations where you may encounter this error:

1. Trying to use __file__ in an interactive interpreter session or a script that is imported as a module.
2. Using a tool or framework that modifies the way scripts are executed or imported, which can result in the __file__ variable not being defined.
3. Running a script in a restricted execution environment that doesn't allow access to certain built-in variables, including __file__.

To fix this error, you can try the following solutions:

1. Use a different way to get the path of the current file, such as using the pathlib module or passing the file path as an argument to the script.
2. Use a different tool or framework that doesn't modify the way scripts are executed or imported.
3. If you're running into this error in a restricted execution environment, you may need to modify the environment or use a different approach to achieve your goal.

NameError: name '__file__' is not defined

这个错误通常是在交互式环境中使用了一个与 __file__ 相关的功能，但是 __file__ 只在脚本模式下定义。如果你需要在交互式环境中使用 __file__，你可以使用 try-except 语句来避免它：

try:
    # do something with __file__
except NameError:
    # handle exception

或者，你可以使用 pathlib 库来代替 __file__，因为它在脚本和交互式环境中都能正常工作，例如：

from pathlib import Path

path = Path.cwd()  # 获取当前工作目录的路径对象

希望这能帮助你解决问题。