CSVReader crashes when reading an empty file

[ckrenslehner]

The next statement in the iter function of the class CSVReader is not inside the for loop. There for a Stopiteration error is not catched.

Rewriting the code like this fixes this:

def __iter__(self):
        for (index, line) in enumerate(self.file):
            if index > 0:
                timestamp, arbitration_id, extended, remote, error, dlc, data = line.split(',')

                yield Message(
                    timestamp=float(timestamp),
                    is_remote_frame=(remote == '1'),
                    is_extended_id=(extended == '1'),
                    is_error_frame=(error == '1'),
                    arbitration_id=int(arbitration_id, base=16),
                    dlc=int(dlc),
                    data=b64decode(data),
                )

        self.stop()

[bessman]

This is fixed in develop:

python-can/can/io/csv.py

Lines 91 to 96 in b873299

	# skip the header line
	try:
	next(self.file)
	except StopIteration:
	# don't crash on a file with only a header
	return

[karlding]

Closing since the fix is released as part of v3.3.3.