provide six.pkgname to replace __package__

six.py

@@ -928,6 +928,22 @@ def python_2_unicode_compatible(klass):
  return klass
 
 
+def pkgname(globals):
+ """
+ Return the package name of a module.
+
+ On Python 2 under __future__.absolute_import __package__ is None until an
+ explcit relative import is attempted.
+
+ six.pgkname(globals()) is equivalent to __package__ on Python 3.
+ """
+ pkgname_ = globals.get("__package__")
+ if pkgname_ is not None:
+ return pkgname_
+ modname = globals.get("__name__")
+ return modename if "__path__" in globals else modname.rpartition(".")[0]
+
+
 # Complete the moves implementation.
 # This code is at the end of this module to speed up module loading.
 # Turn this module into a package.