[UI] Add gettext.ngettext to __builtin__.__dict__

Handle plurality with getttext using ngettext. Added to
__builtin__.__dict__ as _n

.pylintrc

@@ -254,7 +254,7 @@ dummy-variables-rgx=_$|dummy
 
 # List of additional names supposed to be defined in builtins. Remember that
 # you should avoid to define new builtins when possible.
-additional-builtins=_,__request__
+additional-builtins=_,_n,__request__
 
 # List of strings which can identify a callback function by name. A callback
 # name must start or end with one of those strings.

deluge/ui/util/lang.py

@@ -22,11 +22,12 @@ log.addHandler(logging.NullHandler())  # Silence: No handlers could be found for
 def set_dummy_trans(warn_msg=None):
     import __builtin__
 
-    def _func(txt):
+    def _func(*txt):
         if warn_msg:
-            log.warn("'%s' has been marked for translation, but translation is unavailable.", txt)
-        return txt
+            log.warn("'%s' has been marked for translation, but translation is unavailable.", txt[0])
+        return txt[0]
     __builtin__.__dict__["_"] = _func
+    __builtin__.__dict__["_n"] = _func
 
 
 def get_translations_path():
@@ -111,6 +112,8 @@ def setup_translations(setup_gettext=True, setup_pygtk=False):
             gettext.bind_textdomain_codeset(domain, 'UTF-8')
             gettext.textdomain(domain)
             gettext.install(domain, translations_path, unicode=True)
+            import __builtin__
+            __builtin__.__dict__["_n"] = gettext.ngettext
         except Exception as ex:
             log.error("Unable to initialize gettext/locale!")
             log.exception(ex)

docs/source/conf.py

@@ -10,6 +10,7 @@
 # All configuration values have a default value; values that are commented out
 # serve to show the default value.
 
+import __builtin__
 import os
 import sys
 from datetime import date
@@ -21,6 +22,10 @@ try:
 except ImportError:
     get_version = None
 
+# Must add these for autodoc to import packages successully
+__builtin__.__dict__["_"] = lambda x: x
+__builtin__.__dict__["_n"] = lambda s, p, n: s if n == 1 else p
+
 # If your extensions are in another directory, add it here. If the directory
 # is relative to the documentation root, use os.path.abspath to make it
 # absolute, like shown here.

tox.ini

@@ -5,7 +5,7 @@
 
 [flake8]
 max-line-length = 120
-builtins = _,__request__
+builtins = _,_n,__request__
 exclude = .git,.tox,dist,build
 
 [pep8]