py3: make Check Book work

when working with lxml.etree strings, everything is explicitly bytes
eli-schwartz · Apr 23, 2019 · abea7a5 · abea7a5
1 parent 2aa2de4
commit abea7a5
Showing 1 changed file with 1 addition and 1 deletion.
diff --git a/src/calibre/ebooks/oeb/polish/check/opf.py b/src/calibre/ebooks/oeb/polish/check/opf.py
@@ -370,7 +370,7 @@ def check_opf(container):
                 errors.append(IncorrectCover(container.opf_name, cover.sourceline, cover.get('content', '')))
             raw = etree.tostring(cover)
             try:
-                n, c = raw.index('name="'), raw.index('content="')
+                n, c = raw.index(b'name="'), raw.index(b'content="')
             except ValueError:
                 n = c = -1
             if n > -1 and c > -1 and n > c: