Use Parquet to bypass Arrow #601
Merged
Conversation
This file contains bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters.
Learn more about bidirectional Unicode characters
whitphx
force-pushed
the
feature/bypass-arrow-serialization
branch
from
ec9d97c
to
00e96d9
Compare
lukasmasuch
approved these changes
Aug 23, 2023
| @@ -260,7 +260,6 @@ As _stlite_ runs on the web browser environment ([Pyodide](https://pyodide.org/) | |||
|
|
|||
| - `st.spinner()` does not work with blocking methods like `pyodide.http.open_url()` because stlite runs on a single-threaded environment, so `st.spinner()` can't execute its code to start showing the spinner during the blocking method occupies the only event loop. | |||
| - `time.sleep()` is no-op. Use `asyncio.sleep()` instead. This is a restriction from Pyodide runtime. See https://github.com/pyodide/pyodide/issues/2354. The following section about top-level await may also help to know how to use async functions on stlite. | |||
| - `st.experimental_data_editor` does not work as it relies on PyArrow, but it doesn't work on Pyodide. Track this issue on https://github.com/whitphx/stlite/issues/509. | |||
| - For URL access, `urllib` and `requests` don't work on Pyodide/stlite, so we have to use alternative methods provided by Pyodide, such as [`pyodide.http.pyfetch()`](https://pyodide.org/en/stable/usage/api/python-api/http.html#pyodide.http.pyfetch) or [`pyodide.http.open_url()`](https://pyodide.org/en/stable/usage/api/python-api/http.html#pyodide.http.open_url). See https://pyodide.org/en/stable/usage/faq.html#how-can-i-load-external-files-in-pyodide for the details. For `pyodide.http.pyfetch()`, see also the following section about top-level await. | |||
| - The C extension packages that are not built for Pyodide cannot be installed. See https://pyodide.org/en/stable/usage/faq.html#micropip-can-t-find-a-pure-python-wheel for the details. | |||
There was a problem hiding this comment.
nit: maybe add something like:
st.bokeh_chartdoes not work since Pyodide uses Bokeh version 3.x while Streamlit only supports 2.x. The 3.x support for Streamlit is tracked here: Support bokeh 3.0.3 streamlit/streamlit#5858- There are some small differences in how (less common) data types of DataFrame columns are handled in
st.dataframe,st.data_editor,st.table, and Altair-based charts. The reason is that stlite uses the Parquet format instead of the Arrow IPC format to serialize dataframes.
There was a problem hiding this comment.
Thanks! I added the second one in this PR, and will do the first one in another PR.
Sign up for free
to join this conversation on GitHub.
Already have an account?
Sign in to comment
Add this suggestion to a batch that can be applied as a single commit.
This suggestion is invalid because no changes were made to the code.
Suggestions cannot be applied while the pull request is closed.
Suggestions cannot be applied while viewing a subset of changes.
Only one suggestion per line can be applied in a batch.
Add this suggestion to a batch that can be applied as a single commit.
Applying suggestions on deleted lines is not supported.
You must change the existing code in this line in order to create a valid suggestion.
Outdated suggestions cannot be applied.
This suggestion has been applied or marked resolved.
Suggestions cannot be applied from pending reviews.
Suggestions cannot be applied on multi-line comments.
Suggestions cannot be applied while the pull request is queued to merge.
Suggestion cannot be applied right now. Please check back later.
Resolves #509