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-rw-r--r--ipalib/constants.py6
1 files changed, 5 insertions, 1 deletions
diff --git a/ipalib/constants.py b/ipalib/constants.py
index 7e562b530..06ff99d5e 100644
--- a/ipalib/constants.py
+++ b/ipalib/constants.py
@@ -19,9 +19,13 @@
# Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
"""
-All constants centralized in one file.
+All constants centralised in one file.
"""
+# The parameter system treats all these values as None:
+NULLS = (None, '', u'', tuple(), [])
+
+
# Used for a tab (or indentation level) when formatting for CLI:
CLI_TAB = ' ' # Two spaces