Fixes found by check

src/calibre/ebooks/conversion/plugins/snb_output.py

@@ -4,7 +4,7 @@ __license__ = 'GPL 3'
 __copyright__ = '2010, Li Fanxi <lifanxi@freemindworld.com>'
 __docformat__ = 'restructuredtext en'
 
-import os, string
+import os
 
 from calibre.customize.conversion import OutputFormatPlugin, OptionRecommendation
 from calibre.ptempfile import TemporaryDirectory

src/calibre/ebooks/rtf2xml/check_encoding.py

@@ -1,5 +1,5 @@
-from __future__ import unicode_literals, absolute_import, print_function, division
 #!/usr/bin/env python2
+from __future__ import unicode_literals, absolute_import, print_function, division
 import sys
 
 

src/odf/opendocument.py

@@ -606,7 +606,7 @@ def OpenDocumentTextMaster():
 
 
 def __loadxmlparts(z, manifest, doc, objectpath):
-    from load import LoadParser
+    from .load import LoadParser
     from xml.sax import make_parser, handler
 
     for xmlfile in (objectpath+'settings.xml', objectpath+'meta.xml', objectpath+'content.xml', objectpath+'styles.xml'):