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220b4a7 | 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 176 177 178 179 180 181 182 183 184 185 186 187 188 189 190 191 192 193 194 195 196 197 | """
Task definitions: Easy → Medium → Hard
Each task has: code snippet, context, ground truth bugs, and grading rubric.
"""
TASKS = {
"easy_syntax": {
"task_id": "easy_syntax",
"task_name": "Python Syntax Error Detection",
"difficulty": "easy",
"language": "python",
"max_steps": 5,
"context": (
"This Python function is supposed to calculate a discounted price. "
"It should raise a ValueError if discount exceeds 100%, otherwise "
"return the price after applying the discount. Find and fix any errors."
),
"code_snippet": """\
def calculate_discount(price, discount_percent):
if discount_percent > 100
raise ValueError("Discount cannot exceed 100%")
discount = price * (discount_percent / 100)
return price - discount
result = calculate_discount(200, 15)
print(result)
""",
"ground_truth": {
"issue_type": "syntax_error",
"bug_line": 2,
"keywords": ["colon", "syntax", "if statement", "missing :", ":"],
"fix_keywords": ["if discount_percent > 100:"],
"description": "Missing colon at end of if statement on line 2",
},
},
"medium_logic": {
"task_id": "medium_logic",
"task_name": "Logic Bug: Off-by-One in Palindrome Check",
"difficulty": "medium",
"language": "python",
"max_steps": 8,
"context": (
"This function checks whether a given string is a palindrome "
"(reads the same forwards and backwards, ignoring spaces and case). "
"It passes some basic tests but fails on others. Find the logic bug and fix it."
),
"code_snippet": """\
def is_palindrome(s: str) -> bool:
s = s.lower().replace(" ", "")
for i in range(len(s) // 2):
if s[i] != s[-i]: # Compare from both ends
return False
return True
# Expected: True for "racecar", "A man a plan a canal Panama"
# Expected: False for "hello", "world"
print(is_palindrome("racecar")) # Should be True
print(is_palindrome("hello")) # Should be False
print(is_palindrome("A man a plan a canal Panama")) # Should be True
""",
"ground_truth": {
"issue_type": "logic_bug",
"bug_line": 4,
"keywords": [
"off-by-one", "index", "-i", "-(i+1)", "s[-i]",
"s[0]", "zero", "first character", "always equal"
],
"fix_keywords": ["s[-(i+1)]", "s[-i-1]", "-(i+1)"],
"description": (
"s[-i] when i=0 evaluates to s[0] (the first character), "
"so it always equals s[i] at i=0. Should be s[-(i+1)]."
),
"test_cases": [
{"input": "racecar", "expected": True},
{"input": "hello", "expected": False},
{"input": "amanaplanacanalpanama", "expected": True},
{"input": "abba", "expected": True},
{"input": "abc", "expected": False},
],
},
},
"hard_security": {
"task_id": "hard_security",
"task_name": "Security Vulnerability: SQL Injection & Path Traversal",
"difficulty": "hard",
"language": "python",
"max_steps": 10,
"context": (
"This is a user authentication module for a web application. "
"It handles login and serves user-uploaded profile documents. "
"Perform a thorough security review — identify ALL vulnerabilities "
"and provide a fixed, secure version of the code."
),
"code_snippet": """\
import sqlite3
import os
def authenticate_user(username: str, password: str) -> bool:
\"\"\"Authenticate user against the database.\"\"\"
conn = sqlite3.connect("users.db")
cursor = conn.cursor()
# Build query with user input directly
query = (
"SELECT * FROM users WHERE username='"
+ username
+ "' AND password='"
+ password
+ "'"
)
cursor.execute(query)
result = cursor.fetchone()
conn.close()
return result is not None
def get_user_document(username: str, filename: str) -> str:
\"\"\"Return contents of a user's uploaded document.\"\"\"
base_dir = "/app/user_docs"
filepath = os.path.join(base_dir, username, filename)
with open(filepath, "r") as f:
return f.read()
def hash_password(password: str) -> str:
\"\"\"Hash password before storage.\"\"\"
import hashlib
return hashlib.md5(password.encode()).hexdigest()
""",
"ground_truth": {
"vulnerabilities": [
{
"issue_type": "security_vulnerability",
"name": "SQL Injection",
"keywords": [
"sql injection", "injection", "parameterized",
"prepared statement", "user input", "string concatenation",
"sanitize", "placeholder", "?"
],
"fix_keywords": [
"?", "parameterized", "cursor.execute(query, (username",
"execute(query, "
],
"severity": "critical",
},
{
"issue_type": "security_vulnerability",
"name": "Path Traversal",
"keywords": [
"path traversal", "directory traversal", "../",
"os.path.abspath", "startswith", "realpath",
"sanitize", "filename", "escape"
],
"fix_keywords": [
"abspath", "realpath", "startswith", "normpath"
],
"severity": "high",
},
{
"issue_type": "security_vulnerability",
"name": "Weak Password Hashing (MD5)",
"keywords": [
"md5", "weak", "hash", "bcrypt", "argon2",
"sha256", "pbkdf2", "salt", "password hashing"
],
"fix_keywords": [
"bcrypt", "argon2", "pbkdf2", "hashlib.sha256",
"passlib", "werkzeug"
],
"severity": "high",
},
],
},
},
}
def get_task(task_id: str) -> dict:
if task_id not in TASKS:
raise ValueError(f"Unknown task: {task_id}. Available: {list(TASKS.keys())}")
return TASKS[task_id]
def list_tasks() -> list:
return [
{
"task_id": t["task_id"],
"task_name": t["task_name"],
"difficulty": t["difficulty"],
"language": t["language"],
"max_steps": t["max_steps"],
}
for t in TASKS.values()
]
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