To fix the error where "T_Or" is not defined, you should either define "T_Or" as a property of the class or use it with "self" if it's meant to be an instance variable.

---FILEPATH /Users/someone/Projects/proj01/pyright_not_defined.py
---FIND
```python
    def handleInput(self, input):
        if input == T_Or or input == self.T_And:
```
---REPLACE
```python
    def handleInput(self, input):
        # Assuming T_Or should be an instance variable, similar to T_And
        if input == self.T_Or or input == self.T_And:
```
---COMPLETE