Data download with FIDO breaks inside streamlit with parfive>=2.0.0

[AthKouloumvakos]

It seems that the data download breaks with parfive>=2.0.0 with the error below.

The problem is probably an incompatibility between the parfive(asyncio) and streamlit and needs further investigation.

RuntimeError: set_wakeup_fd only works in main thread of the main interpreter
Traceback:
File "/Users/user/opt/anaconda3/envs/PyThea/lib/python3.9/site-packages/streamlit/runtime/scriptrunner/script_runner.py", line 556, in _run_script
    exec(code, module.__dict__)
File "/Users/user/Desktop/Koulou_MAC/myPython/myProject/streamlit_apps/PyThea/PyThea/PyThea_app.py", line 427, in <module>
    run()
File "/Users/user/Desktop/Koulou_MAC/myPython/myProject/streamlit_apps/PyThea/PyThea/PyThea_app.py", line 209, in run
    st.session_state.map_[imager] = download_fits(st.session_state.date_process,
File "/Users/user/Desktop/Koulou_MAC/myPython/myProject/streamlit_apps/PyThea/./PyThea/utils.py", line 119, in download_fits
    downloaded_files = Fido.fetch(result)
File "/Users/user/opt/anaconda3/envs/PyThea/lib/python3.9/site-packages/sunpy/net/fido_factory.py", line 432, in fetch
    results = downloader.download()
File "/Users/user/opt/anaconda3/envs/PyThea/lib/python3.9/site-packages/parfive/downloader.py", line 330, in download
    return self._run_in_loop(self.run_download())
File "/Users/kouloa1/opt/anaconda3/envs/PyThea/lib/python3.9/site-packages/parfive/downloader.py", line 249, in _run_in_loop
    self._add_shutdown_signals(loop, task)
File "/Users/user/opt/anaconda3/envs/PyThea/lib/python3.9/site-packages/parfive/downloader.py", line 226, in _add_shutdown_signals
    loop.add_signal_handler(sig, task.cancel)
File "/Users/user/opt/anaconda3/envs/PyThea/lib/python3.9/asyncio/unix_events.py", line 97, in add_signal_handler
    raise RuntimeError(str(exc))

[AthKouloumvakos]

In ba524a1 I pin parfive to == 1.5.1

[AthKouloumvakos]

It seems that loop.add_signal_handler(sig, task.cancel) from parfive throws the error.