w.configure(option=value, ...)
Set the values of one or more options. For the options whose names are Python reserved words (class, from, in), use a trailing underbar: 'class_', 'from_', 'in_'.
You can also set the value of an option for widget w with the statement
w[option] = value
If you call the .config() method on a widget with no arguments, you'll get a dictionary of all the widget's current options. The keys are the option names (including aliases like bd for borderwidth). The value for each key is:
for most entries, a five-tuple: (option name, option database key, option database class, default value, current value); or,
for alias names (like 'fg'), a two-tuple: (alias name, equivalent standard name).
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