Change apt_pkg.Cache() so that passing None for 'progress' results in

no progress output

1 files changed, 2 insertions, 1 deletions

diff --git a/doc/source/library/apt_pkg.rst b/doc/source/library/apt_pkg.rst
index 1b75a154..709648ac 100644
--- a/doc/source/library/apt_pkg.rst
+++ b/doc/source/library/apt_pkg.rst
@@ -40,7 +40,8 @@ Working with the cache
     The constructor takes an optional argument which must be a subclass of
     :class:`apt.progress.base.OpProgress`. This object will then be used to
     display information during the cache opening process (or possible creation
-    of the cache).
+    of the cache). It may also be ``None``, in which case no progress will
+    be emitted. If not given, progress will be printed to standard output.
 
     .. describe:: cache[pkgname]