AttributeError: 'NoneType' object has no attribute 'find'
时间: 2023-09-17 09:13:06 浏览: 39
This error occurs when you try to call the `find` method on a variable that is `None`. In other words, you are trying to find something in a variable that doesn't exist or has not been assigned a value.
To fix this error, you need to make sure that the variable is not `None` before calling the `find` method on it. You can do this by checking if the variable is `None` using an `if` statement.
For example:
```
string = None
if string is not None:
index = string.find('something')
print(index)
else:
print('string is None')
```
In this code, we check if the `string` variable is `None` before calling the `find` method on it. If the variable is `None`, we print a message indicating that the variable is `None`. Otherwise, we find the index of the substring 'something' in the string and print it.