In python, how can I check if a filename ends in \'.html\' or \'_files\'?
You probably want to know if a file name ends in these strings, not the file istelf:
if file_name.endswith((".html", "_files")):
# whatever
To test whether a file ends in one of these strings, you can do this:
with open(file_name) as f:
f.seek(-6, 2) # only read the last 6 characters of the file
if f.read().endswith((".html", "_files")):
# whatever