py3: Fix error in Kobo driver when sorting collections

Fixes #1098 (py3: Ignore TypeError when sorting device collections for kobo driver)

src/calibre/devices/kobo/books.py

@@ -7,16 +7,14 @@ import os, time, sys
 from functools import cmp_to_key
 
 from calibre.constants import preferred_encoding, DEBUG, ispy3
-from calibre import isbytestring, force_unicode
+from calibre import isbytestring
-from calibre.utils.icu import sort_key
 
 from calibre.ebooks.metadata.book.base import Metadata
-from calibre.devices.usbms.books import Book as Book_
+from calibre.devices.usbms.books import Book as Book_, CollectionsBookList, none_cmp
-from calibre.devices.usbms.books import CollectionsBookList
 from calibre.utils.config_base import prefs
 from calibre.devices.usbms.driver import debug_print
 from calibre.ebooks.metadata import author_to_author_sort
-from polyglot.builtins import unicode_type, string_or_bytes, iteritems, itervalues, cmp
+from polyglot.builtins import unicode_type, iteritems, itervalues
 
 
 class Book(Book_):
@@ -292,24 +290,6 @@ class KTCollectionsBookList(CollectionsBookList):
         # Sort collections
         result = {}
 
-        def none_cmp(xx, yy):
-            x = xx[1]
-            y = yy[1]
-            if x is None and y is None:
-                # No sort_key needed here, because defaults are ascii
-                return cmp(xx[2], yy[2])
-            if x is None:
-                return 1
-            if y is None:
-                return -1
-            if isinstance(x, string_or_bytes) and isinstance(y, string_or_bytes):
-                x, y = sort_key(force_unicode(x)), sort_key(force_unicode(y))
-            c = cmp(x, y)
-            if c != 0:
-                return c
-            # same as above -- no sort_key needed here
-            return cmp(xx[2], yy[2])
-
         for category, lpaths in iteritems(collections):
             books = sorted(itervalues(lpaths), key=cmp_to_key(none_cmp))
             result[category] = [x[0] for x in books]

src/calibre/devices/usbms/books.py

@@ -20,6 +20,31 @@ from calibre.utils.icu import sort_key
 from polyglot.builtins import string_or_bytes, iteritems, itervalues, cmp
 
 
+def none_cmp(xx, yy):
+    x = xx[1]
+    y = yy[1]
+    if x is None and y is None:
+        # No sort_key needed here, because defaults are ascii
+        return cmp(xx[2], yy[2])
+    if x is None:
+        return 1
+    if y is None:
+        return -1
+    if isinstance(x, string_or_bytes) and isinstance(y, string_or_bytes):
+        x, y = sort_key(force_unicode(x)), sort_key(force_unicode(y))
+    try:
+        c = cmp(x, y)
+    except TypeError:
+        c = 0
+    if c != 0:
+        return c
+    # same as above -- no sort_key needed here
+    try:
+        return cmp(xx[2], yy[2])
+    except TypeError:
+        return 0
+
+
 class Book(Metadata):
 
     def __init__(self, prefix, lpath, size=None, other=None):
@@ -280,30 +305,6 @@ class CollectionsBookList(BookList):
         # Sort collections
         result = {}
 
-        def none_cmp(xx, yy):
-            x = xx[1]
-            y = yy[1]
-            if x is None and y is None:
-                # No sort_key needed here, because defaults are ascii
-                return cmp(xx[2], yy[2])
-            if x is None:
-                return 1
-            if y is None:
-                return -1
-            if isinstance(x, string_or_bytes) and isinstance(y, string_or_bytes):
-                x, y = sort_key(force_unicode(x)), sort_key(force_unicode(y))
-            try:
-                c = cmp(x, y)
-            except TypeError:
-                c = 0
-            if c != 0:
-                return c
-            # same as above -- no sort_key needed here
-            try:
-                return cmp(xx[2], yy[2])
-            except TypeError:
-                return 0
-
         for category, lpaths in iteritems(collections):
             books = sorted(itervalues(lpaths), key=cmp_to_key(none_cmp))
             result[category] = [x[0] for x in books]