1 files changed, 26 insertions, 0 deletions
diff --git a/_action/splitappend.py b/_action/splitappend.py
new file mode 100644
index 0000000..77008e2
--- /dev/null
+++ b/_action/splitappend.py
@@ -0,0 +1,26 @@
+# coding: utf-8
+
+import argparse
+
+
+class SplitAppendAction(argparse._AppendAction):
+    """append to list, like normal "append", but split first
+    (default split on ',')
+
+    parser = argparse.ArgumentParser()
+    parser.add_argument('-d', action=SplitAppendAction)
+
+    the following argument have the same list as result:
+       -d ab -d cd -d kl -d mn
+       -d ab,cd,kl,mn
+       -d ab,cd -d kl,mn
+    """
+    def __init__(self, *args, **kw):
+        self._split_chr = ','
+        argparse.Action.__init__(self, *args, **kw)
+
+    def __call__(self, parser, namespace, values, option_string=None):
+        # _AppendAction does not return a value
+        for value in values.split(self._split_chr):
+            argparse._AppendAction.__call__(
+                self, parser, namespace, value, option_string)