py3 porting

src/calibre/utils/browser.py

@@ -1,16 +1,15 @@
 #!/usr/bin/env python2
 # vim:fileencoding=UTF-8:ts=4:sw=4:sta:et:sts=4:ai
+# License: GPLv3 Copyright: 2010, Kovid Goyal <kovid at kovidgoyal.net>
+from __future__ import absolute_import, division, print_function, unicode_literals
 
-__license__   = 'GPL v3'
-__copyright__ = '2010, Kovid Goyal <kovid@kovidgoyal.net>'
-__docformat__ = 'restructuredtext en'
-
-import copy, ssl
+import copy
+import ssl
 
 from mechanize import Browser as B, HTTPSHandler
 
 from polyglot import http_client
-from polyglot.http_cookie import CookieJar, Cookie
+from polyglot.http_cookie import Cookie, CookieJar
 
 
 class ModernHTTPSHandler(HTTPSHandler):

src/calibre/utils/cleantext.py

@@ -1,6 +1,7 @@
-__license__ = 'GPL 3'
-__copyright__ = '2010, sengian <sengian1@gmail.com>'
-__docformat__ = 'restructuredtext en'
+#!/usr/bin/env python2
+# vim:fileencoding=utf-8
+# License: GPLv3 Copyright: 2010, Kovid Goyal <kovid at kovidgoyal.net>
+from __future__ import absolute_import, division, print_function, unicode_literals
 
 import re
 from polyglot.builtins import codepoint_to_chr, map, range, filter
@@ -24,7 +25,7 @@ def ascii_pat(for_binary=False):
     if ans is None:
         chars = set(range(32)) - {9, 10, 13}
         chars.add(127)
-        pat = u'|'.join(map(codepoint_to_chr, chars))
+        pat = '|'.join(map(codepoint_to_chr, chars))
         if for_binary:
             pat = pat.encode('ascii')
         ans = re.compile(pat)
@@ -38,14 +39,14 @@ def clean_ascii_chars(txt, charlist=None):
     This is all control chars except \t, \n and \r
     '''
     is_binary = isinstance(txt, bytes)
-    empty = b'' if is_binary else u''
+    empty = b'' if is_binary else ''
     if not txt:
         return empty
 
     if charlist is None:
         pat = ascii_pat(is_binary)
     else:
-        pat = u'|'.join(map(codepoint_to_chr, charlist))
+        pat = '|'.join(map(codepoint_to_chr, charlist))
         if is_binary:
             pat = pat.encode('utf-8')
     return pat.sub(empty, txt)
@@ -57,15 +58,15 @@ def allowed(x):
 
 
 def py_clean_xml_chars(unicode_string):
-    return u''.join(filter(allowed, unicode_string))
+    return ''.join(filter(allowed, unicode_string))
 
 
 clean_xml_chars = native_clean_xml_chars or py_clean_xml_chars
 
 
 def test_clean_xml_chars():
-    raw = u'asd\x02a\U00010437x\ud801b\udffe\ud802'
-    if native_clean_xml_chars(raw) != u'asda\U00010437xb':
+    raw = 'asd\x02a\U00010437x\ud801b\udffe\ud802'
+    if native_clean_xml_chars(raw) != 'asda\U00010437xb':
         raise ValueError('Failed to XML clean: %r' % raw)
 
 
@@ -75,7 +76,7 @@ def test_clean_xml_chars():
 # @param text The HTML (or XML) source text.
 # @return The plain text, as a Unicode string, if necessary.
 
-def unescape(text, rm=False, rchar=u''):
+def unescape(text, rm=False, rchar=''):
     def fixup(m, rm=rm, rchar=rchar):
         text = m.group(0)
         if text[:2] == "&#":

src/calibre/utils/formatter_functions.py

@@ -6,7 +6,7 @@ Created on 13 Jan 2011
 
 @author: charles
 '''
-from __future__ import print_function
+from __future__ import absolute_import, division, print_function, unicode_literals
 
 __license__   = 'GPL v3'
 __copyright__ = '2010, Kovid Goyal <kovid@kovidgoyal.net>'
@@ -838,7 +838,7 @@ class BuiltinFormatsSizes(BuiltinFormatterFunction):
     def evaluate(self, formatter, kwargs, mi, locals):
         fmt_data = mi.get('format_metadata', {})
         try:
-            return ','.join(k.upper()+':'+str(v['size']) for k,v in iteritems(fmt_data))
+            return ','.join(k.upper()+':'+unicode_type(v['size']) for k,v in iteritems(fmt_data))
         except:
             return ''
 
@@ -857,7 +857,7 @@ class BuiltinFormatsPaths(BuiltinFormatterFunction):
     def evaluate(self, formatter, kwargs, mi, locals):
         fmt_data = mi.get('format_metadata', {})
         try:
-            return ','.join(k.upper()+':'+str(v['path']) for k,v in iteritems(fmt_data))
+            return ','.join(k.upper()+':'+unicode_type(v['path']) for k,v in iteritems(fmt_data))
         except:
             return ''
 
@@ -1088,7 +1088,7 @@ class BuiltinBooksize(BuiltinFormatterFunction):
             try:
                 v = mi._proxy_metadata.book_size
                 if v is not None:
-                    return str(mi._proxy_metadata.book_size)
+                    return unicode_type(mi._proxy_metadata.book_size)
                 return ''
             except:
                 pass

src/calibre/utils/network.py

@@ -1,10 +1,8 @@
 #!/usr/bin/env python2
 # vim:fileencoding=UTF-8:ts=4:sw=4:sta:et:sts=4:ai
-from __future__ import with_statement
+# License: GPLv3 Copyright: 2010, Kovid Goyal <kovid at kovidgoyal.net>
 
-__license__   = 'GPL v3'
-__copyright__ = '2010, Kovid Goyal <kovid@kovidgoyal.net>'
-__docformat__ = 'restructuredtext en'
+from __future__ import absolute_import, division, print_function, unicode_literals
 
 from calibre.constants import iswindows, islinux, isbsd
 from calibre.utils.config_base import tweaks