fix: make the app launchable when nest_asyncio is applied

[mikeldking]

resolves #1353

This resolves the issue that nest asyncio makes the application fail to launch. Many notebooks, including ones from llamaIndex, have nest_asyncio applied at the top. In these cases the server cannot crash. This makes it so that the server runs via the "asyncio" eventloop when it is applied.

import os
import phoenix as px
import logging
import nest_asyncio

nest_asyncio.apply()
logging.basicConfig(level=logging.INFO)
px.launch_app()

INFO:phoenix.session.session:Running Phoenix in a process
INFO:phoenix.services:command: [/Users/mikeldking/.virtualenvs/phoenix/bin/python](https://file+.vscode-resource.vscode-cdn.net/Users/mikeldking/.virtualenvs/phoenix/bin/python) main.py --export_path [/var/folders/1s/4vdv59n15b1ghg42frdd8f480000gn/T/tmp1z1xx6_c/exports](https://file+.vscode-resource.vscode-cdn.net/var/folders/1s/4vdv59n15b1ghg42frdd8f480000gn/T/tmp1z1xx6_c/exports) --host 127.0.0.1 --port 6006 --umap_params 0.0,30,500 datasets --primary phoenix_dataset_67bf7bad-1f57-4312-840a-2d32aa6b262a
🌍 To view the Phoenix app in your browser, visit http://127.0.0.1:6006/
📺 To view the Phoenix app in a notebook, run `px.active_session().view()`
📖 For more information on how to use Phoenix, check out https://docs.arize.com/phoenix

[RogerHYang]

See alternate solution here.

[mikeldking]

See alternate solution here.

Oh nice, yeah let's do that

[mikeldking]

Though it seems like there is a performance hit

When you're writing production code, it is better to use uvloop than the built-in asyncio event loop. Uvloop is a fast, drop-in replacement for the built-in asyncio event loop of Python. It is written in Cython and built on top of libuv, which is a multi-platform support library with a focus on asynchronous I/O.

[RogerHYang]

Though it seems like there is a performance hit

When you're writing production code, it is better to use uvloop than the built-in asyncio event loop. Uvloop is a fast, drop-in replacement for the built-in asyncio event loop of Python. It is written in Cython and built on top of libuv, which is a multi-platform support library with a focus on asynchronous I/O.

True, but the server is not handling (hundreds of) thousands of requests/s, so it's probably an acceptable trade-off.

[RogerHYang]

LGTM