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--- argparse_notes [2024/02/12 22:01] – raju
+++ argparse_notes [2024/02/12 22:18] (current) – raju
@@ Line 1: / Line 1: @@
-==== dummy 1 ====
-==== dummy 2 ====
-==== dummy 3 ====
-==== dummy 4 ====
 ==== --feature and --no-feature ====
+To do
+<code>
+command --feature
+</code>
+and
+<code>
+command --no-feature
+</code>
+For python >= 3.9:
+<code>
+parser.add_argument('--feature', action=argparse.BooleanOptionalAction)
+</code>
+For python < 3.9:
+<code>
+parser.add_argument('--feature', action='store_true')
+parser.add_argument('--no-feature', dest='feature', action='store_false')
+parser.set_defaults(feature=True)
+</code>
+In practice:
 <code>
 parser.add_argument(
@@ Line 15: / Line 33: @@
 parser.set_defaults(header=True)
 </code>
+Ref:-
+  * https://stackoverflow.com/questions/15008758/parsing-boolean-values-with-argparse
+  * https://docs.python.org/3/library/argparse.html#action -> search for ''<nowiki>--no-foo</nowiki>''