Gets error "Error on reading from the event loop self pipe" at exit after parsing pcapng file

[MortenZdk]

The single.pcapng file (attached in .zip) contains a single packet, and is parsed with the script:

import pyshark

cap = pyshark.FileCapture('single.pcapng')

print('# WP: Before')
print(cap[0])
print('# WP: After') 

This results in the output, with error after the print of packet:

# WP: Before ... # WP: After Error on reading from the event loop self pipe loop: \ Traceback (most recent call last): File "C:\Python39\lib\asyncio\proactor_events.py", line 777, in _loop_self_reading f = self._proactor.recv(self._ssock, 4096) File "C:\Python39\lib\asyncio\windows_events.py", line 445, in recv self._register_with_iocp(conn) File "C:\Python39\lib\asyncio\windows_events.py", line 718, in _register_with_iocp _overlapped.CreateIoCompletionPort(obj.fileno(), self._iocp, 0, 0) OSError: [WinError 87] The parameter is incorrect

So it appears that the error occurs at exit of script, and not during execution.

Versions:

• Python: 3.9.6, 32-bit
• pyshark: 0.4.3

single.zip

[ixfd64]

Try closing the FileCapture object with cap.close() before the script finishes.

[heathdbrown]

I was getting the WinError 87 and the suggested .close() on the capture fixed it, thanks @ixfd64.