bcb-0003

[
  {
    "total": 1,
    "answer": "```python\nimport random\nimport numpy as np\n\ndef task_func(LETTERS):\n    mean_dict = {letter: np.mean([random.randint(0, 100) for _ in range(random.randint(1, 10)]) for letter in LETTERS}\n    return mean_dict\n```",
    "passed": 0,
    "test_error": "==================================== ERRORS ====================================\n______________________ ERROR collecting test_bcb_0003.py _______________________\n/home/psc/miniconda3/envs/peakstone-bcb/lib/python3.10/site-packages/_pytest/python.py:487: in importtestmodule\n    mod = import_path(\n/home/psc/miniconda3/envs/peakstone-bcb/lib/python3.10/site-packages/_pytest/pathlib.py:591: in import_path\n    importlib.import_module(module_name)\n/home/psc/miniconda3/envs/peakstone-bcb/lib/python3.10/importlib/__init__.py:126: in import_module\n    return _bootstrap._gcd_import(name[level:], package, level)\n<frozen importlib._bootstrap>:1050: in _gcd_import\n    ???\n<frozen importlib._bootstrap>:1027: in _find_and_load\n    ???\n<frozen importlib._bootstrap>:1006: in _find_and_load_unlocked\n    ???\n<frozen importlib._bootstrap>:688: in _load_unlocked\n    ???\n/home/psc/miniconda3/envs/peakstone-bcb/lib/python3.10/site-packages/_pytest/assertion/rewrite.py:178: in exec_module\n    exec(co, module.__dict__)\ntest_bcb_0003.py:3: in <module>\n    exec(_pathlib.Path(__file__).with_name(\"solution.py\").read_text(), globals())\nE     File \"<string>\", line 5\nE       mean_dict = {letter: np.mean([random.randint(0, 100) for _ in range(random.randint(1, 10)]) for letter in LETTERS}\nE                                                                                                ^\nE   SyntaxError: closing parenthesis ']' does not match opening parenthesis '('\n=========================== short test summary info ============================\nERROR test_bcb_0003.py\n!!!!!!!!!!!!!!!!!!!! Interrupted: 1 error during collection !!!!!!!!!!!!!!!!!!!!\n1 error in 0.05s"
  },
  {
    "total": 5,
    "answer": "```python\nimport random\nimport numpy as np\n\ndef task_func(LETTERS):\n    mean_dict = {letter: np.mean([random.randint(0, 100) for _ in range(random.randint(1, 10))]) for letter in LETTERS}\n    return mean_dict\n```",
    "passed": 5,
    "test_error": ""
  }
]

You are an expert programmer. Solve the task exactly as specified. Output your solution as fenced code blocks using the required file name(s) and the exact function/type signatures requested. Prefer correctness; do not include prose outside code unless asked.