Could not load demo page

[mainpart]

I ran streamlit run frontend.py and got the following stacktrace in console

2023-08-13 10:28:49.012 `st.experimental_memo` is deprecated. Please use the new command `st.cache_data` instead, which has the same behavior. More information [in our docs](https://docs.streamlit.io/library/advanced-features/caching).
2023-08-13 10:28:49.014 `st.experimental_singleton` is deprecated. Please use the new command `st.cache_resource` instead, which has the same behavior. More information [in our docs](https://docs.streamlit.io/library/advanced-features/caching).
2023-08-13 10:29:07.267 Uncaught app exception
Traceback (most recent call last):
  File "/usr/local/lib/python3.10/site-packages/streamlit/runtime/caching/storage/in_memory_cache_storage_wrapper.py", line 87, in get
    entry_bytes = self._read_from_mem_cache(key)
  File "/usr/local/lib/python3.10/site-packages/streamlit/runtime/caching/storage/in_memory_cache_storage_wrapper.py", line 137, in _read_from_mem_cache
    raise CacheStorageKeyNotFoundError("Key not found in mem cache")
streamlit.runtime.caching.storage.cache_storage_protocol.CacheStorageKeyNotFoundError: Key not found in mem cache

During handling of the above exception, another exception occurred:

Traceback (most recent call last):
  File "/usr/local/lib/python3.10/site-packages/streamlit/runtime/caching/cache_data_api.py", line 634, in read_result
    pickled_entry = self.storage.get(key)
  File "/usr/local/lib/python3.10/site-packages/streamlit/runtime/caching/storage/in_memory_cache_storage_wrapper.py", line 89, in get
    entry_bytes = self._persist_storage.get(key)
  File "/usr/local/lib/python3.10/site-packages/streamlit/runtime/caching/storage/local_disk_cache_storage.py", line 155, in get
    raise CacheStorageKeyNotFoundError(
streamlit.runtime.caching.storage.cache_storage_protocol.CacheStorageKeyNotFoundError: Local disk cache storage is disabled (persist=None)

The above exception was the direct cause of the following exception:

Traceback (most recent call last):
  File "/usr/local/lib/python3.10/site-packages/streamlit/runtime/caching/cache_utils.py", line 263, in _get_or_create_cached_value
    cached_result = cache.read_result(value_key)
  File "/usr/local/lib/python3.10/site-packages/streamlit/runtime/caching/cache_data_api.py", line 636, in read_result
    raise CacheKeyNotFoundError(str(e)) from e
streamlit.runtime.caching.cache_errors.CacheKeyNotFoundError: Local disk cache storage is disabled (persist=None)

During handling of the above exception, another exception occurred:

Traceback (most recent call last):
  File "/usr/local/lib/python3.10/site-packages/streamlit/runtime/caching/storage/in_memory_cache_storage_wrapper.py", line 87, in get
    entry_bytes = self._read_from_mem_cache(key)
  File "/usr/local/lib/python3.10/site-packages/streamlit/runtime/caching/storage/in_memory_cache_storage_wrapper.py", line 137, in _read_from_mem_cache
    raise CacheStorageKeyNotFoundError("Key not found in mem cache")
streamlit.runtime.caching.storage.cache_storage_protocol.CacheStorageKeyNotFoundError: Key not found in mem cache

During handling of the above exception, another exception occurred:

Traceback (most recent call last):
  File "/usr/local/lib/python3.10/site-packages/streamlit/runtime/caching/cache_data_api.py", line 634, in read_result
    pickled_entry = self.storage.get(key)
  File "/usr/local/lib/python3.10/site-packages/streamlit/runtime/caching/storage/in_memory_cache_storage_wrapper.py", line 89, in get
    entry_bytes = self._persist_storage.get(key)
  File "/usr/local/lib/python3.10/site-packages/streamlit/runtime/caching/storage/local_disk_cache_storage.py", line 155, in get
    raise CacheStorageKeyNotFoundError(
streamlit.runtime.caching.storage.cache_storage_protocol.CacheStorageKeyNotFoundError: Local disk cache storage is disabled (persist=None)

The above exception was the direct cause of the following exception:

Traceback (most recent call last):
  File "/usr/local/lib/python3.10/site-packages/streamlit/runtime/caching/cache_utils.py", line 311, in _handle_cache_miss
    cached_result = cache.read_result(value_key)
  File "/usr/local/lib/python3.10/site-packages/streamlit/runtime/caching/cache_data_api.py", line 636, in read_result
    raise CacheKeyNotFoundError(str(e)) from e
streamlit.runtime.caching.cache_errors.CacheKeyNotFoundError: Local disk cache storage is disabled (persist=None)

During handling of the above exception, another exception occurred:

Traceback (most recent call last):
  File "/usr/local/lib/python3.10/site-packages/pytube/__main__.py", line 181, in fmt_streams
    extract.apply_signature(stream_manifest, self.vid_info, self.js)
  File "/usr/local/lib/python3.10/site-packages/pytube/extract.py", line 409, in apply_signature
    cipher = Cipher(js=js)
  File "/usr/local/lib/python3.10/site-packages/pytube/cipher.py", line 33, in __init__
    raise RegexMatchError(
pytube.exceptions.RegexMatchError: __init__: could not find match for ^\w+\W

During handling of the above exception, another exception occurred:

Traceback (most recent call last):
  File "/usr/local/lib/python3.10/site-packages/streamlit/runtime/scriptrunner/script_runner.py", line 552, in _run_script
    exec(code, module.__dict__)
  File "/Users/dmitry/DrumTranscriber/frontend.py", line 68, in <module>
    preds, samples, sr = get_predictions(input, start_from)
  File "/usr/local/lib/python3.10/site-packages/streamlit/runtime/caching/cache_utils.py", line 211, in wrapper
    return cached_func(*args, **kwargs)
  File "/usr/local/lib/python3.10/site-packages/streamlit/runtime/caching/cache_utils.py", line 240, in __call__
    return self._get_or_create_cached_value(args, kwargs)
  File "/usr/local/lib/python3.10/site-packages/streamlit/runtime/caching/cache_utils.py", line 266, in _get_or_create_cached_value
    return self._handle_cache_miss(cache, value_key, func_args, func_kwargs)
  File "/usr/local/lib/python3.10/site-packages/streamlit/runtime/caching/cache_utils.py", line 320, in _handle_cache_miss
    computed_value = self._info.func(*func_args, **func_kwargs)
  File "/Users/dmitry/DrumTranscriber/frontend.py", line 23, in get_predictions
    video = yt.streams.filter(only_audio=True).first()
  File "/usr/local/lib/python3.10/site-packages/pytube/__main__.py", line 296, in streams
    return StreamQuery(self.fmt_streams)
  File "/usr/local/lib/python3.10/site-packages/pytube/__main__.py", line 188, in fmt_streams
    extract.apply_signature(stream_manifest, self.vid_info, self.js)
  File "/usr/local/lib/python3.10/site-packages/pytube/extract.py", line 409, in apply_signature
    cipher = Cipher(js=js)
  File "/usr/local/lib/python3.10/site-packages/pytube/cipher.py", line 33, in __init__
    raise RegexMatchError(
pytube.exceptions.RegexMatchError: __init__: could not find match for ^\w+\W

[mainpart]

okay, i fugured this out

The issue is pytube library and particular this bug - pytube/pytube#1199

TLDR - solution for regexp

To go cipher.py in the pytube site packages
Change line 30
var_regex = re.compile(r"^\w+\W")
to
var_regex = re.compile(r"^$*\w+\W")

[yoshi-man]

great you got it figured, thanks for flagging this, will close this out now.