I've very recently migrated to Py 3.5. This code was working properly in Python 2.7:

with open(fname, 'rb') as f: lines = [x.strip() for x in f.readlines()] for line in lines: tmp = line.strip().lower() if 'some-pattern' in tmp: continue ... code 

After upgrading to 3.5, I'm getting the TypeError: a bytes-like object is required, not 'str' error on the last line (the pattern search code).

I've tried using the '.decode()' function on either side of the statement, also tried 'if tmp.find('some-pattern') != -1: continue' - to no avail....

What am I missing here?