pynag with python3.6 TypeError

Question

I'm trying to read my nagios config data as follows:

pynag.Model.cfg_file = "path_to_nagios.cfg"
all_hosts = pynag.Model.Host.objects.all"

This returns an error TypeError: endswith first arg must be bytes or a tuple of bytes

From what I've read so far, it seems that it's related to how files are opened in python3 Do you know how to correct this? Thanks.

Answer 1

The fix was in the library code. The def parse_file() is opening files as 'rb'. The reason this is an error in Python 3 and not Python 2 is that Python 2 treats bytes as an alias or synonym for str. It doesn't make a distinction between byte strings and unicode strings as is done in Python 3.

In pynag/Parsers/init.py changed

lines = open(self.filename, 'rb').readlines()

to

lines = open(self.filename, 'r').readlines()