Method validate

Lib/test/test_ttk/test_widgets.py:426–431

(to_insert)

    def test_validation(self):
        validation = []
        def validate(to_insert):
            if not 'a' <= to_insert.lower() <= 'z':
                validation.append(False)
                return False
            validation.append(True)
            return True

        self.entry['validate'] = 'key'
        self.entry['validatecommand'] = self.entry.register(validate), '%S'