After submitting the assignment, i am getting this error. What does this mean?
Cell #22. Can’t compile the student’s code. Error: AttributeError(“‘NoneType’ object has no attribute ‘index’”)
Traceback (most recent call last):
File “/home/www/app/grading/exceptions.py”, line 112, in handle_solution_errors
yield {}
File “/home/www/app/grading/abstract.py”, line 393, in _grade
context = compiled_code.run(cell_index=cell.index)
File “/home/www/app/grading/submission/compiled_code.py”, line 195, in run
return list(self._code_items.values())[cell_num - 1].run()
File “/home/www/app/grading/submission/compiled_code.py”, line 54, in run
return import_module(self.import_statement, items)
File “/usr/local/lib/python3.7/importlib/init.py”, line 127, in import_module
return _bootstrap._gcd_import(name[level:], package, level)
File “”, line 1006, in _gcd_import
File “”, line 983, in _find_and_load
File “”, line 967, in _find_and_load_unlocked
File “”, line 677, in _load_unlocked
File “”, line 728, in exec_module
File “”, line 219, in _call_with_frames_removed
File “/tmp/student_solution_cells/cell_22.py”, line 24, in
abs_risks = lr_ARR_quantile(X_dev, y_dev, lr)
File “/tmp/student_solution_cells/cell_20.py”, line 71, in lr_ARR_quantile
arr_by_risk_group.index = None
AttributeError: ‘NoneType’ object has no attribute ‘index’