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-rw-r--r--cloudinit/DataSource.py4
1 files changed, 3 insertions, 1 deletions
diff --git a/cloudinit/DataSource.py b/cloudinit/DataSource.py
index bdcac4ef..623f96b6 100644
--- a/cloudinit/DataSource.py
+++ b/cloudinit/DataSource.py
@@ -157,7 +157,9 @@ class DataSource:
# ie, pkglist=[ "foo", "" ]
# will first try to load foo.DataSource<item>
# then DataSource<item>
-def list_sources(cfg_list, depends, pkglist=[]):
+def list_sources(cfg_list, depends, pkglist=None):
+ if pkglist is None:
+ pkglist = []
retlist = []
for ds_coll in cfg_list:
for pkg in pkglist: