[BUG] NameError on self-referential class type annotations in matrix_exponentiation.py

[Kanika0306]

Repository commit

15bcd92

Python version (python --version)

Python 3.11.7

Dependencies version (pip freeze)

N/A (Standard library only)

Expected behavior

Importing Python.maths.matrix_exponentiation should complete without error, allowing the Matrix class and type hints to be parsed cleanly:

import Python.maths.matrix_exponentiation


### Actual behavior


---

### **Actual behavior** *
```markdown
Importing `Python.maths.matrix_exponentiation` fails during module evaluation with a `NameError`:

```text
Traceback (most recent call last):
  File "<string>", line 1, in <module>
  File "Python/maths/matrix_exponentiation.py", line 13, in <module>
    class Matrix:
  File "Python/maths/matrix_exponentiation.py", line 22, in Matrix
    def __mul__(self, b: Matrix) -> Matrix:
                         ^^^^^^
NameError: name 'Matrix' is not defined