closes #655 - support action='version'

README.md

@@ -163,6 +163,7 @@ Gooey does its best to choose sensible defaults based on the options it finds. C
 | store_const | CheckBox |<img src="https://github.com/chriskiehl/GooeyImages/raw/images/readme-images/f538c850-07c5-11e5-8cbe-864badfa54a9.png"/>|
 | store_true | CheckBox | <img src="https://github.com/chriskiehl/GooeyImages/raw/images/readme-images/f538c850-07c5-11e5-8cbe-864badfa54a9.png"/>|
 | store_False | CheckBox|  <img src="https://github.com/chriskiehl/GooeyImages/raw/images/readme-images/f538c850-07c5-11e5-8cbe-864badfa54a9.png"/>   |
+| version | CheckBox|  <img src="https://github.com/chriskiehl/GooeyImages/raw/images/readme-images/f538c850-07c5-11e5-8cbe-864badfa54a9.png"/>   |
 | append | TextCtrl |  <img src="https://github.com/chriskiehl/GooeyImages/raw/images/readme-images/f54e9f5e-07c5-11e5-86e5-82f011c538cf.png"/>  | 
 | count | DropDown &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; | <img src="https://github.com/chriskiehl/GooeyImages/raw/images/readme-images/f53ccbe4-07c5-11e5-80e5-510e2aa22922.png"/> | 
 | Mutually Exclusive Group | RadioGroup | <img src="https://github.com/chriskiehl/GooeyImages/raw/images/readme-images/f553feb8-07c5-11e5-9d5b-eaa4772075a9.png"/>

gooey/python_bindings/argparse_to_json.py

@@ -12,7 +12,8 @@ from argparse import (
     _StoreFalseAction,
     _StoreTrueAction,
     _StoreAction,
-    _SubParsersAction)
+    _SubParsersAction,
+    _VersionAction)
 from collections import OrderedDict
 from functools import partial
 from uuid import uuid4
@@ -277,8 +278,10 @@ def categorize2(groups, widget_dict, options):
 def categorize(actions, widget_dict, options):
     _get_widget = partial(get_widget, widget_dict)
     for action in actions:
+        if is_version(action):
+            yield action_to_json(action, _get_widget(action, 'CheckBox'), options)
 
-        if is_mutex(action):
+        elif is_mutex(action):
             yield build_radio_group(action, widget_dict, options)
 
         elif is_standard(action):
@@ -352,6 +355,9 @@ def is_file(action):
     ''' action with FileType '''
     return isinstance(action.type, argparse.FileType)
 
+def is_version(action):
+    return isinstance(action, _VersionAction)
+
 def is_standard(action):
     """ actions which are general "store" instructions.
     e.g. anything which has an argument style like:

gooey/tests/test_argparse_to_json.py

@@ -155,6 +155,26 @@ class TestArgparse(unittest.TestCase):
             self.assertEqual(getin(item, ['data', 'default']), None)
 
 
+    def test_version_maps_to_checkbox(self):
+        testcases = [
+            [['--version'], {}, 'TextField'],
+            # we only remap if the action is version
+            # i.e. we don't care about the argument name itself
+            [['--version'], {'action': 'store'}, 'TextField'],
+            # should get mapped to CheckBox becuase of the action
+            [['--version'], {'action': 'version'}, 'CheckBox'],
+            # ditto, even through the 'name' isn't 'version'
+            [['--foobar'], {'action': 'version'}, 'CheckBox'],
+        ]
+        for args, kwargs, expectedType in testcases:
+            with self.subTest([args, kwargs]):
+                parser = argparse.ArgumentParser(prog='test')
+                parser.add_argument(*args, **kwargs)
+                result = argparse_to_json.convert(parser, num_required_cols=2, num_optional_cols=2)
+                contents = getin(result, ['widgets', 'test', 'contents'])[0]
+                self.assertEqual(contents['items'][0]['type'], expectedType)
+
+
     def test_textinput_with_list_default_mapped_to_cli_friendly_value(self):
         """
         Issue: #500