closes #329 - string coersion is too broad causing typing errors

gooey/python_bindings/argparse_to_json.py

@@ -54,6 +54,8 @@ group_defaults = {
 
 item_default = {
     'error_color': '#ea7878',
+    'label_color': '#ff1111',
+    'help_color': '#363636',
     'validator': {
         'type': 'local',
         'test': 'lambda x: True',
@@ -301,7 +303,7 @@ def build_radio_group(mutex_group, widget_group, options):
     'cli_type': 'optional',
     'group_name': 'Choose Option',
     'required': mutex_group.required,
-    'options': getattr(mutex_group, 'gooey_options', {}),
+    'options': merge(item_default, getattr(mutex_group, 'gooey_options', {})),
     'data': {
       'commands': [action.option_strings for action in mutex_group._group_actions],
       'widgets': list(categorize(mutex_group._group_actions, widget_group, options))
@@ -334,7 +336,7 @@ def action_to_json(action, widget, options):
     # Issue #321:
     # Defaults for choice types must be coerced to strings
     # to be able to match the stringified `choices` used by `wx.ComboBox`
-    default = (str(clean_default(action.default))
+    default = (safe_string(clean_default(action.default))
                if widget in dropdown_types
                else clean_default(action.default))
 
@@ -373,3 +375,14 @@ def clean_default(default):
     `default` parameter in Argparse cause errors in Gooey.
     '''
     return default.__name__ if callable(default) else default
+
+
+def safe_string(value):
+    """
+    Coerce a type to string as long as it isn't None
+    """
+    if value is None or isinstance(value, bool):
+        return value
+    else:
+        return str(value)
+

gooey/tests/test_argparse_to_json.py

@@ -1,21 +1,7 @@
-import json
-import sys
-import time
 import unittest
 from argparse import ArgumentParser
-from concurrent import futures
-from os import path
-import wx
-
-from gooey.gui import application
-from gooey.gui.lang.i18n import _
-from gooey.gui.util.freeze import getResourcePath
-from gooey.gui.util.quoting import quote
-from gooey.gui.components.widgets import Dropdown
-from python_bindings import argparse_to_json
-import os
-from pprint import pprint
 
+from python_bindings import argparse_to_json
 from util.functional import getin
 
 
@@ -59,5 +45,17 @@ class TestArgparse(unittest.TestCase):
         self.assertEqual(getin(result, ['data', 'choices']), ['1', '2', '3'])
         # default value is also converted to a string type
         self.assertEqual(getin(result, ['data', 'default']), '1')
+
+    def test_choice_string_cooersion_no_default(self):
+        """
+        Make sure that choice types without a default don't create
+        the literal string "None" but stick with the value None
+        """
+        parser = ArgumentParser()
+        parser.add_argument('--foo', choices=[1, 2, 3])
+
+        choice_action = parser._actions[-1]
+        result = argparse_to_json.action_to_json(choice_action, 'Dropdown', {})
+        self.assertEqual(getin(result, ['data', 'default']), None)