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Solve the following problem using Python, implementing the functions described below, one line at a time
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Description:
 def alignment_display(self):
 """Fills screen with uppercase E's for screen focus and alignment."""

        self.dirty.update(range(self.lines))
        for y in range(self.lines):
            for x in range(self.columns):
                self.buffer[y][x] = self.buffer[y][x]._replace(data="E")