IDLE: configdialog -- factor out VarTrace class #75036

assignee = 'https://github.com/terryjreedy'
closed_at = <Date 2017-07-28.22:37:27.464>
created_at = <Date 2017-07-05.06:03:26.402>
labels = ['expert-IDLE', 'type-feature', '3.7']
title = 'IDLE: configdialog -- factor out VarTrace class'
updated_at = <Date 2017-07-28.22:39:16.355>
user = 'https://github.com/terryjreedy'

activity = <Date 2017-07-28.22:39:16.355>
actor = 'terry.reedy'
assignee = 'terry.reedy'
closed = True
closed_date = <Date 2017-07-28.22:37:27.464>
closer = 'terry.reedy'
components = ['IDLE']
creation = <Date 2017-07-05.06:03:26.402>
creator = 'terry.reedy'
dependencies = []
files = []
hgrepos = []
issue_num = 30853
keywords = []
message_count = 22.0
messages = ['297703', '298886', '298921', '298929', '299012', '299014', '299270', '299271', '299274', '299280', '299283', '299286', '299312', '299313', '299359', '299382', '299388', '299420', '299428', '299430', '299438', '299439']
nosy_count = 2.0
nosy_names = ['terry.reedy', 'cheryl.sabella']
pr_nums = ['2872', '2903', '2914', '2935', '2936', '2937']
priority = 'normal'
resolution = 'fixed'
stage = 'resolved'
status = 'closed'
superseder = None
type = 'enhancement'
url = 'https://bugs.python.org/issue30853'
versions = ['Python 3.6', 'Python 3.7']