`Total of weights must be greater than zero` in Pyodide

[jqdq]

Describe the bug While generating crosswords in Pyodide, an exception rises sometimes:

Uncaught (in promise) PythonError: Traceback (most recent call last):
  File "/lib/python311.zip/_pyodide/_base.py", line 540, in eval_code_async
    await CodeRunner(
  File "/lib/python311.zip/_pyodide/_base.py", line 365, in run_async
    await coroutine
  File "<exec>", line 8, in <module>
  File "/lib/python3.11/site-packages/platyrhynchos/director/direct_search.py", line 16, in generate_crossword
    word, colrow = await cruciverbalist.choose_and_fill(crossword)
                   ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
  File "/lib/python3.11/site-packages/platyrhynchos/cruciverbalist/base.py", line 62, in choose_and_fill
    return await self.find_word(colrows)
           ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
  File "/lib/python3.11/site-packages/platyrhynchos/cruciverbalist/base.py", line 54, in find_word
    choice = random.choices(words, weights=list(range(len(words))), k=1)[0]
             ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
  File "/lib/python311.zip/random.py", line 509, in choices
    raise ValueError('Total of weights must be greater than zero')
ValueError: Total of weights must be greater than zero
    PythonError https://cdn.jsdelivr.net/pyodide/v0.23.1/full/pyodide.asm.js:9
    new_error https://cdn.jsdelivr.net/pyodide/v0.23.1/full/pyodide.asm.js:9
    _PyCFunctionWithKeywords_TrampolineCall https://cdn.jsdelivr.net/pyodide/v0.23.1/full/pyodide.asm.js:9
pyodide.asm.js:9:105278
    a http://localhost:8080/main.js:971
    <anonymous> webpack-internal:///./src/index.js:27
    AsyncFunctionThrow self-hosted:760
    (Async: setTimeout handler)
    hiwire_call_bound https://cdn.jsdelivr.net/pyodide/v0.23.1/full/pyodide.asm.js:9

Additional context It might be due to lack of words