parse_pgarray: allow None

diff --git a/python/skytools/parsing.py b/python/skytools/parsing.py
index 318b1bf93b8b40ecc8e22adc63d0c5e24b6d1d13..3d16a3a13ebd0e4fa96228d6a4ddbf10068f6fcc 100644 (file)
--- a/python/skytools/parsing.py
+++ b/python/skytools/parsing.py
@@ -25,6 +25,8 @@ def parse_pgarray(array):
     >>> parse_pgarray("[0,3]={1,2,3}")
     ['1', '2', '3']
     """
+    if array is None:
+        return None
     if not array or array[0] not in ("{", "[") or array[-1] != '}':
         raise Exception("bad array format: must be surrounded with {}")
     res = []