Classe « Variable » Python 3.11.3

Méthode tkinter.Variable.trace_variable

Signature de la méthode trace_variable

def trace_variable(self, mode, callback) 

Description

help(Variable.trace_variable)

Define a trace callback for the variable.

        MODE is one of "r", "w", "u" for read, write, undefine.
        CALLBACK must be a function which is called when
        the variable is read, written or undefined.

        Return the name of the callback.

        This deprecated method wraps a deprecated Tcl method that will
        likely be removed in the future.  Use trace_add() instead.