make floating point accuracy configurable per question instead of hard coded to 10

Author: xerbalind

alembic/versions/dbb90e86e357_add_accuracy_to_question.py

@@ -0,0 +1,33 @@
+"""Add accuracy to question
+
+Revision ID: dbb90e86e357
+Revises: 54d9cfe74362
+Create Date: 2025-11-26 14:59:58.073951
+
+"""
+from typing import Sequence, Union
+
+from alembic import op
+import sqlalchemy as sa
+import sqlmodel
+
+
+# revision identifiers, used by Alembic.
+revision: str = 'dbb90e86e357'
+down_revision: Union[str, Sequence[str], None] = '54d9cfe74362'
+branch_labels: Union[str, Sequence[str], None] = None
+depends_on: Union[str, Sequence[str], None] = None
+
+
+def upgrade() -> None:
+    """Upgrade schema."""
+    # ### commands auto generated by Alembic - please adjust! ###
+    op.add_column('question', sa.Column('accuracy', sa.Integer(), nullable=False, server_default="10"))
+    # ### end Alembic commands ###
+
+
+def downgrade() -> None:
+    """Downgrade schema."""
+    # ### commands auto generated by Alembic - please adjust! ###
+    op.drop_column('question', 'accuracy')
+    # ### end Alembic commands ###

app/api/models.py

@@ -41,6 +41,8 @@ class QuestionBase(SQLModel):
     max_score_display: str
     number: int = Field(unique=True)
     visible: bool = Field(default=False)
+    # number of decimals after the point that need to match the solution.
+    accuracy: int = Field(default=10)
 
 
 # Shared properties

app/api/routes.py

@@ -138,7 +138,7 @@ class TeamQuestion:
                 (
                     s
                     for s in question_submissions
-                    if is_answer_correct(s.answer, question.solution)
+                    if is_answer_correct(s.answer, question.solution, question.accuracy)
                 ),
                 None,
             )
@@ -203,7 +203,9 @@ class SubmissionCorrect:
     submissions = list(
         map(
             lambda s: SubmissionCorrect(
-                s.timestamp, s.answer, is_answer_correct(s.answer, question.solution)
+                s.timestamp,
+                s.answer,
+                is_answer_correct(s.answer, question.solution, question.accuracy),
             ),
             submissions,
         )
@@ -356,7 +358,7 @@ class TeamAnswer:
                 (
                     s
                     for s in question_submissions
-                    if is_answer_correct(s.answer, question.solution)
+                    if is_answer_correct(s.answer, question.solution, question.accuracy)
                 ),
                 None,
             )
@@ -754,7 +756,7 @@ async def admin_answers_csv(request: Request, session: SessionDep, auth: AdminDe
                 team_name,
                 question_no,
                 i.answer,
-                is_answer_correct(question.solution, i.answer),
+                is_answer_correct(question.solution, i.answer, question.accuracy),
             ]
         )
 

app/api/utils.py

@@ -22,7 +22,7 @@ def get_question_score(
 ) -> float:
     for submission in question_submissions:
         assert submission.question_id == question.id
-        if is_answer_correct(submission.answer, question.solution):
+        if is_answer_correct(submission.answer, question.solution, question.accuracy):
             return 0.9 ** (len(question_submissions) - 1) * question.max_score
 
     return 0.0
@@ -78,14 +78,14 @@ def encoded_logo(logo: Image.Image) -> str:
     return base64.b64encode(bytes.getvalue()).decode()
 
 
-def is_answer_correct(a: str, b: str) -> bool:
+def is_answer_correct(a: str, b: str, accuracy: int = 10) -> bool:
     if "." not in a and a == b:
         return True
     if a.count(".") == 1 and b.count(".") == 1:
         split_a = a.split(".")
         split_b = b.split(".")
-        after_decimal_a = textwrap.wrap(split_a[1], 10)[0]
-        after_decimal_b = textwrap.wrap(split_b[1], 10)[0]
+        after_decimal_a = textwrap.wrap(split_a[1], accuracy)[0]
+        after_decimal_b = textwrap.wrap(split_b[1], accuracy)[0]
         if split_a[0] == split_b[0] and after_decimal_a == after_decimal_b:
             return True
     return False

app/templates/pages/admin_question_form.html

@@ -84,6 +84,24 @@
       />
     </label>
 
+    <label>
+      Accuracy
+      <input
+        type="number"
+        name="accuracy"
+        aria-describedby="accuracy-helper"
+        required
+        {% if question %}
+          value="{{ question.accuracy }}"
+        {% else %}
+          value="10"
+        {% endif %}
+      />
+      <small id="accuracy-helper">
+        Number of decimals after the point where submissions need to exactly match the given solution.
+      </small>
+    </label>
+
     <label>
       Visible
       <input