Evaluator Report

student name — student roll number

File: submissions/sample_solutions.ipynb

Total: 23/27 (85.19%)

Question: check_number

**Return:** A string like `'5 is Positive'`, `'-2 is Negative'`, or `'0 is Zero'`

Assertion	Status	Score
assert check_number(5) == "5 is Positive"	passed	1
assert check_number(-2) == "-2 is Negative"	passed	1
assert check_number(0) == "0 is Zero"	passed	1

Question: sum_1_to_n

**Example:** Input `5` → `15` **Return:** Integer sum of all numbers from 1 to n.

Assertion	Status	Score	Error
assert sum_1_to_n(5) == 15	passed	1
assert sum_1_to_n(10) == 55	passed	1

Question: count_letter

**Example:** Input `('banana', 'a')` → `3` **Return:** The count of that letter in the word.

Assertion	Status	Score	Error
assert count_letter("banana", "a") == 3	passed	1
assert count_letter("apple", "p") == 2	passed	1

Question: even_numbers_1_to_10

**Return:** `[2, 4, 6, 8, 10]`

Assertion	Status	Score	Error
assert even_numbers_1_to_10() == [2, 4, 6, 8, 10]	passed	1

Question: average_of_three

**Example:** Input `(4, 8, 10)` → `7.3333...` **Return:** Arithmetic mean of the three numbers.

Assertion	Status	Score	Error
assert round(average_of_three(4, 8, 10), 2) == 7.33	passed	1
assert average_of_three(3, 3, 3) == 3	passed	1

Question: load_head

**Hint:** Use `pd.read_csv(dataset_path)` **Return:** The first 5 rows as a DataFrame.

Assertion	Status	Score	Error
[context setup]	failed	0	Traceback (most recent call last): File "/Volumes/MacSSD/Areas/Github_Repositories/evaluator/src/evaluator/comparison/comparison_service.py", line 39, in run_assertions exec(context_code, student_namespace) ~~~~^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ File "<string>", line 6, in <module> NameError: name 'load_head' is not defined

Question: dataset_shape

**Return:** A tuple like `(rows, columns)`

Assertion	Status	Score	Error
assert isinstance(result, tuple)	passed	1
assert len(result) == 2	passed	1
assert result[0] > 0	passed	1
assert result[1] == 7	passed	1
assert result == (458, 7)	failed	0	Traceback (most recent call last): File "/Volumes/MacSSD/Areas/Github_Repositories/evaluator/src/evaluator/comparison/comparison_service.py", line 55, in run_assertions exec(code, student_namespace) ~~~~^^^^^^^^^^^^^^^^^^^^^^^^^ File "<string>", line 1, in <module> AssertionError

Question: column_names

**Return:** A list of column names.

Assertion	Status	Score
assert isinstance(result, list)	passed	1
assert result == ['Name', 'Team', 'Position', 'Height', 'Weight', 'College', 'Salary']	passed	1
assert len(result) == 7	passed	1

Question: average_of_column

**Example:** If column name is `'Sales'`, return the mean of that column. **Hint:** Use `df[column_name].mean()`

Assertion	Status	Score	Error
[context setup]	failed	0	Traceback (most recent call last): File "/Volumes/MacSSD/Areas/Github_Repositories/evaluator/src/evaluator/comparison/comparison_service.py", line 39, in run_assertions exec(context_code, student_namespace) ~~~~^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ File "<string>", line 8, in <module> File "<string>", line 3, in average_of_column File "/Volumes/MacSSD/Areas/Github_Repositories/evaluator/.venv/lib/python3.13/site-packages/pandas/core/series.py", line 6570, in mean return NDFrame.mean(self, axis, skipna, numeric_only, kwargs) ~~~~~~~~~~~~^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ File "/Volumes/MacSSD/Areas/Github_Repositories/evaluator/.venv/lib/python3.13/site-packages/pandas/core/generic.py", line 12485, in mean return self._stat_function( ~~~~~~~~~~~~~~~~~~~^ "mean", nanops.nanmean, axis, skipna, numeric_only, kwargs ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ ) ^ File "/Volumes/MacSSD/Areas/Github_Repositories/evaluator/.venv/lib/python3.13/site-packages/pandas/core/generic.py", line 12442, in _stat_function return self._reduce( ~~~~~~~~~~~~^ func, name=name, axis=axis, skipna=skipna, numeric_only=numeric_only ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ ) ^ File "/Volumes/MacSSD/Areas/Github_Repositories/evaluator/.venv/lib/python3.13/site-packages/pandas/core/series.py", line 6478, in _reduce return op(delegate, skipna=skipna, kwds) File "/Volumes/MacSSD/Areas/Github_Repositories/evaluator/.venv/lib/python3.13/site-packages/pandas/core/nanops.py", line 147, in f result = alt(values, axis=axis, skipna=skipna, kwds) File "/Volumes/MacSSD/Areas/Github_Repositories/evaluator/.venv/lib/python3.13/site-packages/pandas/core/nanops.py", line 404, in new_func result = func(values, axis=axis, skipna=skipna, mask=mask, **kwargs) File "/Volumes/MacSSD/Areas/Github_Repositories/evaluator/.venv/lib/python3.13/site-packages/pandas/core/nanops.py", line 719, in nanmean the_sum = values.sum(axis, dtype=dtype_sum) File "/Volumes/MacSSD/Areas/Github_Repositories/evaluator/.venv/lib/python3.13/site-packages/numpy/_core/_methods.py", line 51, in _sum return umr_sum(a, axis, dtype, out, keepdims, initial, where) TypeError: can only concatenate str (not "int") to str

Question: filter_by_value

**Example:** `filter_by_value(dataset_path, 'Region', 'East')` **Return:** Filtered DataFrame

Assertion	Status	Score	Error
assert isinstance(guards, pd.DataFrame)	passed	1
assert len(guards) > 0	failed	0	Traceback (most recent call last): File "/Volumes/MacSSD/Areas/Github_Repositories/evaluator/src/evaluator/comparison/comparison_service.py", line 55, in run_assertions exec(code, student_namespace) ~~~~^^^^^^^^^^^^^^^^^^^^^^^^^ File "<string>", line 1, in <module> AssertionError
assert all(guards['Position'] == 'PG')	passed	1
assert list(guards.columns) == ['Name', 'Team', 'Position', 'Height', 'Weight', 'College', 'Salary']	passed	1
assert isinstance(team_result, pd.DataFrame)	passed	1
assert len(team_result) > 0	passed	1
assert all(team_result['Team'] == 'Boston Celtics')	passed	1