NameError: name 'instance' isn't defined
时间: 2023-10-08 07:06:38 浏览: 31
这个错误是因为在代码中使用了一个名为 'instance' 的变量,但是在使用之前没有定义它。要解决这个问题,你需要确保在使用 'instance' 变量之前先对它进行定义或赋值。可以通过将 'instance' 变量赋予一个值,例如:
```python
instance = None
```
或者根据你的需求给 'instance' 变量赋予一个适当的值。这样就可以避免 'NameError: name 'instance' isn't defined' 错误的发生。
相关问题
NameError: name 'Ture' isn't defined
NameError: name 'Ture' isn't defined是Python中的一个错误提示,它表示你在代码中使用了一个未定义的变量或函数名。在这个例子中,正确的写法应该是True而不是Ture,因为Python中的布尔值只有True和False两种。如果你在代码中使用了一个未定义的变量或函数名,Python会抛出这个错误提示。
NameError: name 'GPIO' isn't defined
It seems that you are encountering a NameError with the 'GPIO' module. This error typically occurs when the 'GPIO' module has not been imported or is not available in your current environment.
To resolve this issue, you need to make sure that you have the 'GPIO' module installed and imported correctly. The 'GPIO' module is commonly used for controlling hardware peripherals, such as the Raspberry Pi's General Purpose Input/Output (GPIO) pins.
If you are working with the Raspberry Pi, you can install the RPi.GPIO library by running the following command:
```
pip install RPi.GPIO
```
After installing the library, you can import it in your Python script with the following line:
```
import RPi.GPIO as GPIO
```
Make sure that your script is running in an environment where the 'RPi.GPIO' library is accessible. If you are running your script outside of a Raspberry Pi, you may encounter this error because the library is specific to that platform.
If you have already installed the 'RPi.GPIO' library and are still encountering this error, please provide more details about your setup and the specific code you are running so that I can assist you further.
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