Incorrect filename reported for an exception raised in an imported file

```python
#modules/mod_exc.py
def problem():
    return 0/0

#test_context.py
from mod_exc import problem
problem()
```
Error:
```
Exception in </config/pyscript/test_context.py> line 2:
        return 0/0
                 ^
ZeroDivisionError: division by zero
```
Expected filename: `/config/pyscript/modules/mod_exc.py`