1 files changed, 29 insertions, 0 deletions
diff --git a/action/date.py b/action/date.py
new file mode 100644
index 0000000..4b73a30
--- /dev/null
+++ b/action/date.py
@@ -0,0 +1,29 @@
+# coding: utf-8
+# Copyright Ruamel bvba 2007-2018
+
+from __future__ import print_function, absolute_import, division, unicode_literals
+
+import argparse
+import datetime
+
+
+class DateAction(argparse.Action):
+    """argparse action for parsing dates with or without dashes
+
+    parser = argparse.ArgumentParser()
+    parser.add_argument('--verbose', '-v', action=DateAction)
+    """
+    def __init__(self, option_strings, dest, nargs=None, **kwargs):
+        if nargs != 1 and nargs not in [None, '?', '*']:
+            raise ValueError("DateAction can only have one argument")
+        super(DateAction, self).__init__(option_strings, dest, nargs=nargs, **kwargs)
+
+    def __call__(self, parser, namespace, values, option_string=None):
+        if values is None:
+            return None
+        s = values
+        for c in './-_':
+            s = s.replace(c, '')
+        val = datetime.datetime.strptime(s, '%Y%m%d').date()
+        #    val = self.const
+        setattr(namespace, self.dest, val)